Jeffrey Gould
Robert L. Hess Endowed Professor of Pediatrics
Pediatrics - Neonatal and Developmental Medicine
Academic Appointments
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Professor - University Medical Line, Pediatrics - Neonatal and Developmental Medicine
Professional Education
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MD, U.Rochester School of Medicine, Medicine (1965)
Current Research and Scholarly Interests
Gould is director of the Perinatal Epidemiology and Health Outcomes Research Unit in the division of Neonatology at the School of Medicine and Lucile Packard Childrens Hospital. He also directs the California Perinatal Quality Care Collaborative, a network of 104 California hospitals that provide intensive care to newborns that have volunteered to submit and compare uniform care processes and outcome data and conduct quality improvement initiatives for their mothers and newborns.
Gould is a leading public health researcher in population-based studies related to neonatal and perinatal diseases. Much of his research is focused on developing strategies to assess the quality of perinatal care based on risk-adjusted indicators of neonatal morbidity.
2024-25 Courses
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Independent Studies (5)
- Directed Reading in Pediatrics
PEDS 299 (Aut, Win, Spr, Sum) - Early Clinical Experience
PEDS 280 (Aut, Win, Spr, Sum) - Graduate Research
PEDS 399 (Aut, Win, Spr, Sum) - Medical Scholars Research
PEDS 370 (Aut, Win, Spr, Sum) - Undergraduate Directed Reading/Research
PEDS 199 (Aut, Win, Spr, Sum)
- Directed Reading in Pediatrics
All Publications
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Methodologic considerations in estimating racial disparity of mortality among very preterm infants.
Pediatric research
2024
Abstract
This review explores methodological considerations in estimating racial disparities in mortality among very preterm infants (VPIs). Significant methodological variations are evident across studies, potentially affecting the estimated mortality rates of VPIs across racial groups and influencing the perceived direction and magnitude of racial disparities. Key methodological approaches include the birth-based approach versus the fetuses-at-risk approach, with each offering distinct insights depending on the specific research questions posed. Cohort selection and the decision for crude versus adjusted comparison are also critical elements that shape the outcomes and interpretations of these studies. This review underscores the importance of careful methodological planning and highlights that no single approach is definitively superior; rather, each has its strengths and limitations depending on the research objectives. The findings suggest that adjusting the methodological approach to align with specific research questions and contexts is essential for accurately assessing and addressing racial disparities in neonatal mortality. IMPACT: Elucidates the impact of methodological choices on perceived racial disparities in neonatal mortality. Offers a comprehensive comparison of birth-based vs. fetuses-at-risk approaches in the context of racial disparity research. Provides guidance on the cohort selection and adjustment criteria critical for interpreting studies on racial disparities in very preterm infant mortality.
View details for DOI 10.1038/s41390-024-03485-w
View details for PubMedID 39179872
View details for PubMedCentralID 7287569
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Evaluating Epidemiologic Trends and Variations in NICU Admissions in California, 2008 to 2018.
Hospital pediatrics
2023; 13 (11): 976-83
Abstract
Previous research suggests increasing numbers of and variation in NICU admissions. We explored whether these trends were reflected in California by examining NICU admissions and birth data in aggregate and among patient and hospital subpopulations more susceptible to variations in care.In this retrospective cohort study, we evaluated NICU utilization between 2008 and 2018 for all live births at hospitals that provide data to the California Perinatal Quality Care Collaborative. We compared hospital- and admission-level data across birth weight (BW), gestational age (GA), and illness acuity categories. Trends were analyzed by using linear regression models.We identified 472 402 inborn NICU admissions and 3 960 441 live births across 144 hospitals. Yearly trends in NICU admissions remained stable among all births and higher acuity births (mean admission rates 11.9% and 4.1%, respectively). However, analysis of the higher acuity births revealed significant increases in NICU admission rates for neonates with higher BW and GA (BW ≥ 2500g: 1.8% in 2008, 2.1% in 2018; GA ≥ 37 weeks: 1.5% in 2010, 1.8% in 2018). Kaiser hospitals had a decreasing trend of NICU admissions compared to non-Kaiser hospitals (Kaiser: 13.9% in 2008, 10.1% in 2018; non-Kaiser: 11.3% in 2008, 12.3% in 2018).Overall NICU admission rates in California were stable from 2008-2018. However, trends similar to national patterns emerged when stratified by infant GA, BW, and illness acuity as well as Kaiser or non-Kaiser hospitals, with increasing admission rates for infants born at higher BW and GA and within non-Kaiser hospitals.
View details for DOI 10.1542/hpeds.2023-007190
View details for PubMedID 37867440
View details for PubMedCentralID PMC10593864
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In Situ Simulation and Clinical Outcomes in Infants Born Preterm.
The Journal of pediatrics
2023: 113715
Abstract
To evaluate impact of a multi-hospital collaborative quality improvement project implementing in situ simulation training for neonatal resuscitation on clinical outcomes for infants born preterm.Twelve neonatal intensive care units (NICUs) were divided into 4 cohorts; each completed a 15-month long program in a stepped wedge manner. Data from California Perinatal Quality Care Collaborative were used to evaluate clinical outcomes. Very low birthweight (VLBW) infants born between 22 through 31 weeks gestation were included. Primary outcome was survival without chronic lung disease (CLD); secondary outcomes included intubation in the delivery room (DR), DR continuous positive airway pressure (CPAP), hypothermia (<36ºC) upon NICU admission, severe intraventricular hemorrhage, and mortality prior to hospital discharge. A mixed effects multivariable regression model was used to assess the intervention effect.Between March 2017 and December 2020, a total of 2,626 eligible VLBW births occurred at 12 collaborative participating sites. Rate of survival without CLD at participating sites was 74.1% in Mar-Aug2017 and 76.0% in Jul-Dec 2020 (RR 1.03 [0.94,1.12]; no significant improvement occurred during the study period for both participating and non-participating sites. The effect of in situ simulation on all secondary outcomes was stable.Implementation of a multi-hospital collaborative providing in situ training for neonatal resuscitation did not result in significant improvement in survival without CLD. Ongoing in situ simulations may have an impact on unit practice and unmeasured outcomes.
View details for DOI 10.1016/j.jpeds.2023.113715
View details for PubMedID 37659586
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Cohort selection and the estimation of racial disparity in mortality of extremely preterm neonates.
Pediatric research
2023
Abstract
BACKGROUND: Racial disparities in preterm neonatal mortality are long-standing. We aimed to assess how cohort selection influences mortality rates and racial disparity estimates.METHODS: With 2014-2018 California data, we compared neonatal mortality rates among Black and non-Hispanic White very low birth weight (VLBW, <1500g) or very preterm infants (22-29 weeks gestational age). Relative risks were estimated by different cohort selection criteria. Blinder-Oaxaca decomposition quantified factors contributing to mortality differential.RESULTS: Depending upon standard selection criteria, mortality ranged from 6.2% (VLBW infants excluding first 12-h deaths) to 16.0% (22-29 weeks' gestation including all deaths). Black observed neonatal mortality was higher than White infants only for delivery room deaths in VLBW infants (5.6 vs 4.2%). With risk adjustment accounting for higher rate of low gestational age, low Apgar score and other factors, White infant mortality increased from 15.9 to 16.6%, while Black infant mortality decreased from 16.7 to 13.7% in the 22-29 weeks cohort. Across varying cohort selection, risk adjusted survival advantage among Black infants ranged from 0.70 (CL 0.61-0.80) to 0.84 (CL 0.76-0.93).CONCLUSIONS: Standard cohort selection can give markedly different mortality estimates. It is necessary to reduce prematurity rates and perinatal morbidity to improve outcomes for Black infants.IMPACT: In this population-based observational cohort study that encompassed very low birth weight infant hospitalizations in California, varying standard methods of cohort selection resulted in neonatal mortality ranges from 6.2 to 16.0%. Across all cohorts, the only significant observed Black-White disparity was for delivery room deaths in Very Low Birth Weight births (5.6 vs 4.2%). Across all cohorts, we found a 16-30% survival advantage for Black infants. Cohort selection can result in an almost three-fold difference in estimated mortality but did not have a meaningful impact on observed or adjusted differences in neonatal mortality outcomes by race and ethnicity.
View details for DOI 10.1038/s41390-023-02766-0
View details for PubMedID 37580552
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Moms in the NICU: developing a pilot to engage and empower women who have delivered a prematurely born infant.
BMC pregnancy and childbirth
2023; 23 (1): 432
Abstract
BACKGROUND: Mothers spend long hours at their preterm infant's bedside in the Neonatal Intensive Care Unit (NICU), giving clinicians the opportunity to engage mothers in caring for their own health.OBJECTIVE: To develop a NICU based intervention to reduce the risk of a future premature birth by engaging and empowering mothers to improve their own health and identify barriers to implementing their improvement.DESIGN: Development based on a framework of narrative discourse refined by the Quality Improvement Plan Do Study Act Approach.SETTING: Level II Stepdown Neonatal Intensive Care Unit.PARTICIPANTS: 14 mothers of preterm infants, ages 24-39 years.METHODS: A team of Maternal Fetal Medicine Physicians, obstetricians, neonatologists, neonatal nurses, and parents developed guidelines to elicit the mother's birth story, review the story with a clinical expert to fill in knowledge gaps, identify strategies to improve health to reduce the risk of future preterm birth, and facilitate mother developing an action plan with specific six week goals. A phone interview was designed to assess success and identify barriers to implementing their health plan. The protocol was modified as needed after each intervention to improve the interventions.RESULTS: "Moms in the NICU" toolkit is effective to guide any clinical facilitator to engage, identify health improvement strategies, and co-develop an individualized health plan and its take home summary reached stability after the 5th mother. Mothers reported experiencing reassurance, understanding, and in some cases, relief. Participants were enthusiastic to inform future quality improvement activities by sharing the six week barriers faced implementing their health plan.CONCLUSION: Engaging in the NICU provides an opportunity to improve mothers' understanding of potential factors that may be linked to preterm birth, and promote personally selected actions to improve their health and reduce the risk of a future preterm birth.
View details for DOI 10.1186/s12884-023-05738-8
View details for PubMedID 37301839
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Linked Birth Cohort Files for Perinatal Health Research: California as a Model for Methodology and Implementation.
Annals of epidemiology
2023
Abstract
PURPOSE: Rigorous perinatal epidemiologic research depends on population-based parental and neonatal sociodemographic and clinical data. Here we describe the creation of linked birth cohort files (LBCF), an enriched data source that combines information from vital records with maternal delivery and infant hospital encounter records.METHODS: Probabilistic linkage techniques were used to link vital records (i.e., birth and fetal death certificates) from the California Department of Public Health with hospital inpatient, ambulatory surgery and emergency department encounter data for mothers and infants from the California Department of Health Care Access and Information.RESULTS: From 2012 to 2018, 95% of live birth records were successfully linked to maternal and newborn hospital records while 85% of fetal death records were linked to a maternal delivery record. Overall, 93% of postnatal hospital encounters of infants (i.e., <1 year old) were matched to a linked record.CONCLUSION: The LBCF is a rich resource opening many possibilities for understanding perinatal health outcomes and opportunities for linkage to longitudinal, social determinant, and environmental data. To optimally use this file for research, analysts should evaluate possible shortcomings or biases of the data sources being linked.
View details for DOI 10.1016/j.annepidem.2022.12.014
View details for PubMedID 36603709
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Vignette Research Methodology: An Essential Tool for Quality Improvement Collaboratives.
Healthcare (Basel, Switzerland)
2022; 11 (1)
Abstract
Variation in patient outcomes among institutions and within institutions is a major problem in healthcare. Some of this variation is due to differences in practice, termed practice variation. Some practice variation is expected due to appropriately personalized care for a given patient. However, some practice variation is due to the individual preference or style of the clinicians. Quality improvement collaboratives are commonly used to disseminate quality care on a wide scale. Practice variation is a notable barrier to any quality improvement effort. A detailed and accurate understanding of practice variation can help optimize the quality improvement efforts. The traditional survey methods do not capture the complex nuances of practice variation. Vignette methods have been shown to accurately measure the actual practice variation and quality of care delivered by clinicians. Vignette methods are cost-effective relative to other methods of measuring quality of care. This review describes our experience and lessons from implementing vignette research methods in quality improvement collaboratives in California neonatal intensive care units. Vignette methodology is an ideal tool to address practice variation in quality improvement collaboratives, actively engage a large number of participants, and support more evidence-based practice to improve outcomes.
View details for DOI 10.3390/healthcare11010007
View details for PubMedID 36611468
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Validation of ICD-10-CM Diagnosis Codes for Gestational Age at Birth.
Epidemiology (Cambridge, Mass.)
2022
Abstract
The International Classification of Diseases Clinical Modification 10th Revision (ICD-CM-10) introduced diagnosis codes for week of gestation. Our objective was to assess the validity of these codes among live births, which could have major utility in perinatal research and quality improvement.We used linked birth certificate and patient discharge data from births in California during 2016-2019 (N = 1,843,992). We identified gestational age using Z3A.xx ICD-10-CM diagnosis codes in birthing patient discharge data and compared it with the gold standard of obstetric estimate, as recorded on the birth certificate. We further assessed sensitivity and specificity of gestational age categories (≥37 weeks, <37 weeks, <32 weeks, <28 weeks), given these categories are frequently of interest, and evaluated differences in validity of preterm birth (<37 weeks' gestation) by patient characteristics.1,770,103 patients had a gestational age recorded in patient discharge and birth certificate data. When comparing gestational age in patient discharge data with birth certificate data, the concordance correlation coefficient was 0.96 (95% CI: 0.96, 0.96) and the mean difference between the two measurements was 0.047 (95% CI: 0.046, 0.047) weeks. 95% of the differences between the two measurements were between -1.00 week and +1.09 weeks. Sensitivity and specificity were 0.94 to 1.00 for all gestational age categories and were 0.94 to 1.00 for preterm birth across sociodemographic groups.We found week-specific gestational age at delivery ICD-10-CM diagnosis codes in patient discharge data to have high validity when compared with the best obstetric estimate on the birth certificate.
View details for DOI 10.1097/EDE.0000000000001557
View details for PubMedID 36166206
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Active treatment of infants born at 22-25 weeks of gestation in California, 2011-2018.
The Journal of pediatrics
2022
Abstract
OBJECTIVE: To determine the rate and trend of active treatment in a population-based cohort of 22-25 weeks' gestation infants and to examine factors associated with active treatment.STUDY DESIGN: This observational study from 2011 to 2018 of hospitals in the California Perinatal Quality Care Collaborative evaluated 8247 infants born at 22-25 weeks' gestation. Multivariable logistic regression related maternal demographic and prenatal factors, fetal characteristics, and hospital level of care to the primary outcome of active treatment.RESULTS: Active treatment was provided to 6657 infants. Rates at 22 weeks were 19.4%, increased with each advancing week, and were significantly higher for infants born between days 4-6 at 22 or 23 weeks' gestation (26.2% and 78.3%, respectively), compared with those born between days 0-3 (14.1% and 65.9%, respectively; p<0.001). The rate of active treatment at 23 weeks increased from 2011 to 2018 (64.9% to 83.4%; p<0.0001), but did not change significantly at 22 weeks. Factors associated with increased odds of active treatment included maternal Hispanic ethnicity and Black race, preterm premature rupture of membranes, obstetrical bleeding, antenatal steroids, and cesarean section. Factors associated with decreased odds included lower gestational age and small for gestational age birth weight.CONCLUSIONS: In California, active treatment rates at 23 weeks' gestation increased between 2011 and 2018; rates at 22 weeks did not. At 22 and 23 weeks, rates increased during the latter part of the week. Several maternal and infant factors were associated with the likelihood of active treatment.
View details for DOI 10.1016/j.jpeds.2022.06.013
View details for PubMedID 35714966
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Validation of ICD-10-CM Diagnosis Codes for Gestational Age at Birth
MOSBY-ELSEVIER. 2022: S429
View details for Web of Science ID 000737459401022
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Randomized controlled trial of the "WISER" intervention to reduce healthcare worker burnout.
Journal of perinatology : official journal of the California Perinatal Association
2021
Abstract
OBJECTIVE: Test web-based implementation for the science of enhancing resilience (WISER) intervention efficacy in reducing healthcare worker (HCW) burnout.DESIGN: RCT using two cohorts of HCWs of four NICUs each, to improve HCW well-being (primary outcome: burnout). Cohort 1 received WISER while Cohort 2 acted as a waitlist control.RESULTS: Cohorts were similar, mostly female (83%) and nurses (62%). In Cohorts 1 and 2 respectively, 182 and 299 initiated WISER, 100 and 176 completed 1-month follow-up, and 78 and 146 completed 6-month follow-up. Relative to control, WISER decreased burnout (-5.27 (95% CI: -10.44, -0.10), p=0.046). Combined adjusted cohort results at 1-month showed that the percentage of HCWs reporting concerning outcomes was significantly decreased for burnout (-6.3% (95%CI: -11.6%, -1.0%); p=0.008), and secondary outcomes depression (-5.2% (95%CI: -10.8, -0.4); p=0.022) and work-life integration (-11.8% (95%CI: -17.9, -6.1); p<0.001). Improvements endured at 6 months.CONCLUSION: WISER appears to durably improve HCW well-being.CLINICAL TRIALS NUMBER: NCT02603133; https://clinicaltrials.gov/ct2/show/NCT02603133.
View details for DOI 10.1038/s41372-021-01100-y
View details for PubMedID 34366432
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Randomized controlled trial of the "WISER" intervention to reduce healthcare worker burnout
JOURNAL OF PERINATOLOGY
2021
View details for DOI 10.1038/541372-021-01100-y
View details for Web of Science ID 000682814300001
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Vignettes Identify Variation in Antibiotic Use for Suspected Early Onset Sepsis.
Hospital pediatrics
2021
Abstract
BACKGROUND AND OBJECTIVES: There is widespread unwarranted antibiotic use and large individual provider variation in antibiotic use in NICUs. Vignette-based research methodology offers a unique method of studying variation in individual provider decisions. The objective with this study was to use a vignette-based survey to identify specific areas of provider antibiotic use variation in newborns being evaluated for early onset sepsis.METHODS: This study was undertaken as part of a statewide multicenter neonatal antibiotic stewardship quality improvement project led by a perinatal quality improvement collaborative. A web-based vignette survey was administered to identify variation in decisions to start and discontinue antibiotics in cases of early onset sepsis.RESULTS: The largest variation was noted in 3 of the 6 vignette cases. These cases highlighted variation in (1) decisions to start antibiotics in a case describing a well-appearing newborn with risk factors and an elevated C-reactive protein, (2) decisions to start antibiotics in the case of a newborn with risk factors plus mild respiratory signs at birth, and (3) decisions to stop antibiotics in the case of the newborn with a history of sepsis risk factors and mild clinical respiratory signs that resolved after 72 hours.CONCLUSIONS: Clinical vignette assessment identified specific areas of variation in individual provider antibiotic use decisions in cases of suspected early onset sepsis. Vignettes are a valuable method of describing individual provider variation and highlighting antibiotic stewardship improvement opportunities in NICUs.
View details for DOI 10.1542/hpeds.2020-000448
View details for PubMedID 34083354
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Early term-infant discharge associated with higher re-admission rates
JOURNAL OF PEDIATRICS
2021; 230: 267-268
View details for Web of Science ID 000740972000004
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Measuring Variation in Interpregnancy Interval: Identifying Hotspots for Improvement Initiatives.
American journal of perinatology
2021
Abstract
The study aimed to determine if single year birth certificate data can be used to identify regional and hospital variation in rates of short interpregnancy interval (IPI < 6 months). IPI was estimated for multiparous women ages 15 to 44 years with singleton live births between 2015 and 2016. Perinatal outcomes, place of birth, maternal race, and data for IPI calculations were obtained by using birth certificates. IPI frequencies are presented as observed rates. The cohort included 562,039 multiparous women. Short IPI rates were similar to those obtained with analyses by using linked longitudinal data and confirmed the association with preterm birth. Short IPI rates varied by race and Hispanic nativity. There was substantial hospital (0.8-9%) and regional (2.9-6.2%) variation in short IPI rates. IPI rates can be reliably obtained from current year birth certificate data. This can be a useful tool for quality improvement projects targeting interventions and rapidly assessing their progress to promote optimal birth spacing.· Near-real time regional and hospital IPI rates can be reliably obtained from current year birth certificate data.. · Substantial variations in rates of short IPI exist between hospital and perinatal regions.. · IPI rates from individual birth certificates can be a tool to target and assess interventions..
View details for DOI 10.1055/s-0041-1728819
View details for PubMedID 33940645
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Singleton preterm birth rates for racial and ethnic groups during the coronavirus disease 2019 pandemic in California.
American journal of obstetrics and gynecology
2020
View details for DOI 10.1016/j.ajog.2020.10.033
View details for PubMedID 33203528
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Building the First Statewide Quality Improvement Collaborative, the CPQCC: A Historic Perspective.
Children (Basel, Switzerland)
2020; 7 (10)
Abstract
The California Perinatal Quality Improvement Collaborative (CPQCC), founded in 1997, was the country's first statewide perinatal quality improvement collaborative. Our goal was to improve the quality and outcomes of perinatal healthcare in California by developing a collaborative network of public and private obstetric and neonatal providers, insurers, public health professionals, and business groups to support a system for benchmarking and performance improvement activities for perinatal care. In this presentation, we describe how viewing the CPQCC as a complex value-driven organization, committed to identifying and addressing the needs of both its stakeholder partners and neonatal intensive care unit (NICU) members, has shaped the course of its development.
View details for DOI 10.3390/children7100177
View details for PubMedID 33053628
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Outcomes of Infants with Very Low Birth Weight Associated with Birthplace Difference: A Retrospective Cohort Study of Births in Japan and California.
The Journal of pediatrics
2020
Abstract
OBJECTIVE: To determine whether outcomes among infants with very low birth weight (VLBW) vary according to the birthplace (Japan or California) controlling for maternal ethnicity.STUDY DESIGN: Severe intraventricular hemorrhage (IVH) and mortality were ascertained for infants with VLBW born at 24-29 weeks of gestation during 2008-2017 and retrospectively analyzed by the country of birth for mothers and infants (Japan or California) RESULTS: Rates of severe IVH, mortality, or combined IVH/mortality were lower in the 24,095 infants born in Japan (5.1%, 5.0%, 8.8% respectively) compared with infants born in California either to 157 mothers with Japanese ethnicity (12.5%, 9.7%, 17.8%) or to a comparison group of 6173 non-Hispanic White mothers (8.4%, 8.8%, 14.6%). Odds ratios (95% CI) for adverse outcomes were increased for infants born in California to mothers with Japanese ethnicity compared with infants born in Japan for severe IVH [3.31 (1.93-5.68)], mortality [3.73 (2.03-6.86)], and the combined outcome [3.26 (2.02-5.27)]. Odds of these outcomes also were increased for infants born in California to non-Hispanic White mothers compared with infants born in Japan. Outcomes of infants born in California did not differ by Japanese or non-Hispanic White maternal ethnicity.CONCLUSIONS: Low rates of severe IVH and mortality for infants with VLBW born in Japan were not seen in infants born in California to mothers with Japanese ethnicity. Differences in systems of regional perinatal care, social environment, and the quality of perinatal care may partially account for these differences in outcomes.
View details for DOI 10.1016/j.jpeds.2020.10.010
View details for PubMedID 33058856
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Racial/Ethnic Disparities Among Extremely Preterm Infants in the United States From 2002 to 2016.
JAMA network open
2020; 3 (6): e206757
Abstract
Importance: Racial/ethnic disparities in quality of care among extremely preterm infants are associated with adverse outcomes.Objective: To assess whether racial/ethnic disparities in major outcomes and key care practices were changing over time among extremely preterm infants.Design, Setting, and Participants: This observational cohort study used prospectively collected data from 25 US academic medical centers. Participants included 20 092 infants of 22 to 27 weeks' gestation with a birth weight of 401 to 1500 g born at centers participating in the National Institute of Child Health and Human Development Neonatal Research Network from 2002 to 2016. Of these infants, 9316 born from 2006 to 2014 were eligible for follow-up at 18 to 26 months' postmenstrual age (excluding 5871 infants born before 2006, 2594 infants born after 2014, and 2311 ineligible infants including 64 with birth weight >1000 g and 2247 infants with gestational age >26 6/7 weeks), of whom 745 (8.0%) did not have known follow-up outcomes at 18 to 26 months.Main Outcomes and Measures: Rates of mortality, major morbidities, and care practice use over time were evaluated using models adjusted for baseline characteristics, center, and birth year. Data analyses were conducted from 2018 to 2019.Results: In total, 20 092 infants with a mean (SD) gestational age of 25.1 (1.5) weeks met the inclusion criteria and were available for the primary outcome: 8331 (41.5%) black infants, 3701 (18.4%) Hispanic infants, and 8060 (40.1%) white infants. Hospital mortality decreased over time in all groups. The rate of improvement in hospital mortality over time did not differ among black and Hispanic infants compared with white infants (black infants went from 35% to 24%, Hispanic infants went from 32% to 27%, and white infants went from 30% to 22%; P=.59 for race*year interaction). The rates of late-onset sepsis among black infants (went from 37% to 24%) and Hispanic infants (went from 45% to 23%) were initially higher than for white infants (went from 36% to 25%) but decreased more rapidly and converged during the most recent years (P=.02 for race*year interaction). Changes in rates of other major morbidities did not differ by race/ethnicity. Death before follow-up decreased over time (from 2006 to 2014: black infants, 14%; Hispanic infants, 39%, white infants, 15%), but moderate-severe neurodevelopmental impairment increased over time in all racial/ethnic groups (increase from 2006 to 2014: black infants, 70%; Hispanic infants, 123%; white infants, 130%). Rates of antenatal corticosteroid exposure (black infants went from 72% to 90%, Hispanic infants went from 73% to 83%, and white infants went from 86% to 90%; P=.01 for race*year interaction) and of cesarean delivery (black infants went from 45% to 59%, Hispanic infants went from 49% to 59%, and white infants went from 62% to 63%; P=.03 for race*year interaction) were initially lower among black and Hispanic infants compared with white infants, but these differences decreased over time.Conclusions and Relevance: Among extremely preterm infants, improvements in adjusted rates of mortality and most major morbidities did not differ by race/ethnicity, but rates of neurodevelopmental impairment increased in all groups. There were narrowing racial/ethnic disparities in important care practices, including the use of antenatal corticosteroids and cesarean delivery.
View details for DOI 10.1001/jamanetworkopen.2020.6757
View details for PubMedID 32520359
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Towards personalized medicine in maternal and child health: integrating biologic and social determinants.
Pediatric research
2020
View details for DOI 10.1038/s41390-020-0981-8
View details for PubMedID 32454518
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Composite neonatal morbidity indicators using hospital discharge data: A systematic review.
Paediatric and perinatal epidemiology
2020
Abstract
BACKGROUND: Neonatal morbidity is associated with lifelong impairments, but the absence of a consensual definition and the need for large data sets limit research.OBJECTIVES: To inform initiatives to define standard outcomes for research, we reviewed composite neonatal morbidity indicators derived from routine hospital discharge data.DATA SOURCES: PubMed (updated on October 12, 2018). The search algorithm was based on three components: "morbidity," "neonatal," and "hospital discharge data."STUDY SELECTION AND DATA EXTRACTION: Studies investigating neonatal morbidity using a composite indicator based on hospital discharge data were included. Indicators defined for specific conditions (eg congenital anomalies, maternal addictions) were excluded. The target population, objectives, component morbidities, diagnosis and procedure codes, validation methods, and prevalence of morbidity were extracted.SYNTHESIS: For each study, we assessed construct validity by describing the methods used to select the indicator components and evaluated whether the authors assessed internal and external validity. We also calculated confidence intervals for the prevalence of the morbidity composite.RESULTS: Seventeen studies fulfilled inclusion criteria. Indicators targeted all (n=4), low-/moderate-risk (n=9), and very preterm (VPT, n=4) infants. Components were similar for VPT infants, but domains and diagnosis codes within domains varied widely for all and low-/moderate-risk infants. Component selection was described for 8/17 indicators and some form of validation reported for 12/17. Neonatal morbidity prevalence ranged from 4.6% to 9.0% of all infants, 0.4% to 8.0% of low-/moderate-risk infants, and 17.8% to 61.0% of VPT infants.CONCLUSIONS: Multiple neonatal morbidity indicators based on hospital discharge data have been used for research, but their heterogeneity limits comparisons between studies. Standard neonatal outcome measures are needed for benchmarking and synthesis of research results.
View details for DOI 10.1111/ppe.12665
View details for PubMedID 32207172
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Multilevel social factors and NICU quality of care in California.
Journal of perinatology : official journal of the California Perinatal Association
2020
Abstract
OBJECTIVE: Our objective was to incorporate social and built environment factors into a compendium of multilevel factors among a cohort of very low birth weight infants to understand their contributions to inequities in NICU quality of care and support providers and NICUs in addressing these inequitiesvia development of a health equity dashboard.STUDY DESIGN: We examined bivariate associations between NICU patient pool and NICU catchment area characteristics and NICU quality of care with data from a cohort of 15,901 infants from 119 NICUs in California, born 2008-2011.RESULT: NICUs with higher proportion of minority racial/ethnic patients and lower SES patients had lower quality scores. NICUs with catchment areas of lower SES, higher composition of minority residents, and more household crowding had lower quality scores.CONCLUSION: Multilevel social factors impact quality of care in the NICU. Their incorporation into a health equity dashboard can inform providers of their patients' potential resource needs.
View details for DOI 10.1038/s41372-020-0647-8
View details for PubMedID 32157221
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Preterm birth outcomes among Asian women by maternal place of birth.
Journal of perinatology : official journal of the California Perinatal Association
2020
Abstract
To investigate overall, spontaneous, and medically indicated preterm birth (PTB) rates between US-born and non-US-born Asian women living in California.Nulliparous women with a singleton livebirth and Asian race in California between 2007 and 2011 were investigated. The prevalence of overall (<37 weeks), spontaneous, and medically indicated PTB was examined by self-reported race and place of birth among ten Asian subgroups.There were marked differences in PTB rates between the individual Asian subgroups. After adjustments, non-US-born Chinese, Japanese, Vietnamese, and Indian women had lower odds of overall PTB and Chinese, Vietnamese, Cambodian, and Indian women had lower odds of spontaneous PTB compared with their US-born counterparts.Further investigation of biological and social factors contributing to these lower odds of spontaneous PTB among the non-US-born Asian population could potentially offer clues for reducing the burden of PTB among the US born.
View details for DOI 10.1038/s41372-020-0633-1
View details for PubMedID 32094480
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Cytomegalovirus Infection among Infants in Neonatal Intensive Care Units, California, 2005 to 2016
AMERICAN JOURNAL OF PERINATOLOGY
2020; 37 (2): 146–50
View details for DOI 10.1055/s-0039-1683958
View details for Web of Science ID 000507900100003
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Survival Without Major Morbidity Among Very Low Birth Weight Infants in California.
Pediatrics
2020
Abstract
To examine trends in survival without major morbidity and its individual components among very low birth weight infants across California and assess remaining gaps that may be opportune targets for improvement efforts.The study population included infants born between 2008 and 2017 with birth weights of 401 to 1500 g or a gestational age of 22 to 29 weeks. Risk-adjusted trends of survival without major morbidity and its individual components were analyzed. Survival without major morbidity was defined as the absence of death during birth hospitalization, chronic lung disease, severe peri-intraventricular hemorrhage, nosocomial infection, necrotizing enterocolitis, severe retinopathy of prematurity or related surgery, and cystic periventricular leukomalacia. Variations in adjusted rates and/or interquartile ranges were examined. To assess opportunities for additional improvement, all hospitals were reassigned to perform as if in the top quartile, and recalculation of predicted numbers were used to estimate potential benefit.In this cohort of 49 333 infants across 142 hospitals, survival without major morbidity consistently increased from 62.2% to 66.9% from 2008 to 2017. Network variation decreased, with interquartile ranges decreasing from 21.1% to 19.2%. The largest improvements were seen for necrotizing enterocolitis and nosocomial infection. Bronchopulmonary dysplasia rates did not change significantly. Over the final 3 years, if all hospitals performed as well as the top quartile, an additional 621 infants per year would have survived without major morbidity, accounting for an additional 6.6% annual improvement.Although trends are promising, bronchopulmonary dysplasia remains a common and persistent major morbidity, remaining a target for continued quality-improvement efforts.
View details for DOI 10.1542/peds.2019-3865
View details for PubMedID 32554813
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Population Improvement Bias Observed in Estimates of the Impact of Antenatal Steroids to Outcomes in Preterm Birth.
The Journal of pediatrics
2020
Abstract
To examine the hypothesis that increasing rates and differential uptake of antenatal steroids (would bias estimation of impact of ANS on neonatal death and severe (grade III-IV) intraventricular hemorrhage (IVH).The study population included infants born between 24 to 28 weeks gestational age in the California Perinatal Quality Care Collaborative. Outcomes were in-hospital mortality and severe IVH. Mixed multivariable logistic regression models estimated the effect of ANS exposure, one model accounting for individual risk factors as fixed effects, and a second model incorporating a predicted probability factor estimating overall risk status for each time period.The study cohort included 28,252 infants. ANS exposure increased from 80.1% in 2005 to 90.3% in 2016, severe IVH decreased from 14.5% to 9.0%, and mortality decreased from 12.8% to 9.1%. When stratified by group, 3-year observed outcomes improved significantly in infants exposed to ANS (12.5% to 8.6% for IVH, 11.5% to 8.8% for death), but not in those not exposed (20.7% to 19.1% and 16.6% to 15.5%, respectively). Women not receiving ANS had higher risk profile (such as no prenatal care) and higher predicted probability for severe IVH and mortality. Both outcomes exhibited little change (P > .05) over time for the group without ANS. In contrast, in women receiving ANS, observed and adjusted rates for both outcomes decreased (p < 0.0001).As the population's proportion of ANS use increased, the observed positive effect of ANS also increased. This apparent increase may be designated as the "population improvement bias."
View details for DOI 10.1016/j.jpeds.2020.11.067
View details for PubMedID 33275981
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Time of Birth and the Risk of Severe Unexpected Complications in Term Singleton Neonates.
Obstetrics and gynecology
2020
Abstract
To assess whether there is a relationship between evening, night, and weekend births and severe unexpected neonatal morbidity in low-risk term singleton births.We conducted a population-based, cross-sectional analysis. Severe unexpected neonatal morbidity as defined by the National Quality Forum specification 0716 was derived from linked birth certificate and hospital discharge summaries for 1,048,957 low-risk singleton term Californian births during 2011 through 2013. The association between the nursing shift (7 am-3 pm vs 3-11 pm and 11 pm -7 am) and weekday compared with weekend birth and the risk of severe unexpected neonatal morbidity was estimated using mixed effects logistic regression models.Severe unexpected neonatal morbidity was higher among births during the 3-11 pm evening shift (2.1%) and the 11 pm-7 am night shift (2.1%), compared with those during the 7 am-3 pm day shift (1.8%). The adjusted odds ratios (ORs) were 1.10 (95% CI 1.06-1.13) for the evening shift and 1.15 (1.11-1.19) for the night shift. The adjusted ORs of severe unexpected neonatal morbidity were increased only on Sunday, as compared with other days (adjusted OR 1.08, 95% CI 1.02-1.14). When our analysis was by perinatal region, the increase was seen in four of the nine perinatal regions.After risk adjustment, the risk of severe unexpected morbidity in the low-risk singleton California birth cohort was significantly increased on Sundays and births during evening and night shifts. These elevations were detected in only four of California's nine perinatal regions. Further analysis at the individual hospital level is warranted.
View details for DOI 10.1097/AOG.0000000000003922
View details for PubMedID 32649496
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Maternal and infant predictors of infant mortality in California, 2007-2015.
PloS one
2020; 15 (8): e0236877
Abstract
To identify current maternal and infant predictors of infant mortality, including maternal sociodemographic and economic status, maternal perinatal smoking and obesity, mode of delivery, and infant birthweight and gestational age.This retrospective study analyzed data from the linked birth and infant death files (birth cohort) and live births from the Birth Statistical Master files (BSMF) in California compiled by the California Department of Public Health for 2007-2015. The birth cohort study comprised 4,503,197 singleton births including 19,301 infant deaths during the nine-year study period. A subpopulation to study fetal growth consisted of 4,448,300 birth cohort records including 13,891 infant deaths.The infant mortality rate (IMR) for singleton births decreased linearly (p <0.001) from 4.68 in 2007 to 3.90 (per 1,000 live births) in 2015. However, significant disparities in IMR were uncovered in different population groups depending upon maternal sociodemographic and economic characteristics and maternal characteristics during pregnancy. Children of African American women had almost twice the risk of infant mortality when compared with children of White women (AOR 2.12; 95% CI, 1.98-2.27; p<0.001). Infants of women with Bachelor's degrees or higher were 89% less likely to die (AOR 1.89; 95% CI, 1.76-2.04; p<0.001) when compared to infants of women with education less than high school. Infants of maternal smokers were 75% more likely to die (AOR 1.75; 95% CI, 1.58-1.93; p<0.001) than infants of nonsmokers. Infants of women who were overweight and obese during pregnancy accounted for 55% of IMR over all women in the study. More than half of the infant deaths were to children of women with lower socioeconomic status; infants of WIC participants were 59% more likely to die (AOR 1.59; 95% CI, 1.52-1.67; p<0.001) than infants of non-WIC participants. With respect to infant predictors, infants born with LBW or PTB were more than six times (AOR 6.29; 95% CI, 5.90-6.70; p<0.001) and almost four times (AOR 3.95; 95% CI, 3.73-4.19; p<0.001) more likely to die than infants who had normal births, respectively. SGA and LGA infants were more than two times (AOR 2.03; 95% CI, 1.92-2.15; p<0.001) and 41% (AOR 1.41; 95% CI, 1.32-1.52; p<0.001) more likely to die than AGA infants, respectively.While the overall IMR in California is declining, wide disparities in death rates persist in different groups, and these disparities are increasing. Our data indicate that maternal sociodemographic and economic factors, as well as maternal prepregnancy obesity and smoking during pregnancy, have a prominent effect on IMR though no causality can be inferred with the current data. These predictors are not typically addressed by direct medical care. Infant factors with a major effect on IMR are birthweight and gestational age-predictors that are addressed by active medical services. The highest value interventions to reduce IMR may be social and public health initiatives that mitigate disparities in sociodemographic, economic and behavioral risks for mothers.
View details for DOI 10.1371/journal.pone.0236877
View details for PubMedID 32760136
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Reduction in Racial Disparities in Severe Maternal Morbidity from Hemorrhage in a Large-scale Quality Improvement Collaborative.
American journal of obstetrics and gynecology
2020
Abstract
Eliminating persistent racial/ethnic disparities in maternal mortality and morbidity is a public health priority. National strategies to improve maternal outcomes are increasingly focused on quality improvement collaboratives. However, the effectiveness of quality collaboratives for reducing racial disparities in maternity care is understudied.To evaluate the impact of a hemorrhage quality improvement collaborative on racial disparities in severe maternal morbidity (SMM) from hemorrhage.We conducted a cross-sectional study from 2011 to 2016 among 99 hospitals that participated in a hemorrhage quality improvement collaborative in California. The focus of the quality collaborative was to implement the national maternal hemorrhage safety bundle consisting of 17 evidence-based recommendations for practice and care processes known to improve outcomes. This analysis included 54,311 women from the baseline period (January 2011 through December 2014) and 19,165 women from the post-intervention period (October 2015 through December 2016) with a diagnosis of obstetric hemorrhage during delivery hospitalization. We examined whether racial/ethnic-specific SMM rates in these women with obstetric hemorrhage were reduced from the baseline to the post-intervention period. In addition, we conducted Poisson Generalized Estimating Equation models to estimate relative risks (RRs) and 95% confidence intervals (CIs) for SMM comparing each racial/ethnic group to White.During the baseline period, the rate of SMM among women with hemorrhage was 22.1% (12,002/54,311) with the highest rate observed among Blacks (28.6%, 973/3,404), and the lowest among Whites (19.8%, 3,124/15,775). The overall rate fell to 18.5% (3,553/19,165) in the post-intervention period. Both Black and White mothers benefited from the intervention, but the benefit among Blacks exceeded that of Whites (9.0% vs. 2.1% absolute rate reduction). The baseline risk of SMM was 1.34 times higher among Black mothers compared to Whites (RR: 1.34, 95% CI: 1.27-1.42), and it was reduced to 1.22 (1.05-1.40) in the post-intervention period. Sociodemographic and clinical factors explained a part of the Black-White differences. After controlling for these factors, the Black-White RR was 1.22 (95% CI: 1.15-1.30) at baseline and narrowed to 1.07 (1.92-1.24) in the post-intervention period. Results were similar when excluding SMM cases with transfusion alone. After accounting for maternal risk factors, the Black-White RR for SMM excluding transfusion alone was reduced from a baseline of 1.33 (95% CI: 1.16-1.52) to 0.99 (0.76-1.29) in the post-intervention period. The most important clinical risk factor for disparate Black rates for both SMM and SMM excluding transfusion alone was cesarean delivery, potentially providing another opportunity for quality improvement.A large-scale quality improvement collaborative reduced rates of SMM due to hemorrhage in all races and reduced the performance gap between Blacks and Whites. Improving access to highly effective treatments has the potential to decrease disparities for care-sensitive acute hospital-focused morbidities.
View details for DOI 10.1016/j.ajog.2020.01.026
View details for PubMedID 31978432
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Factors Associated with Successful First High-Risk Infant Clinic Visit for Very Low Birth Weight Infants in California
JOURNAL OF PEDIATRICS
2019; 210: 91-+
View details for DOI 10.1016/j.jpeds.2019.03.007
View details for Web of Science ID 000472497600019
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Racial Segregation and Inequality in the Neonatal Intensive Care Unit for Very Low-Birth-Weight and Very Preterm Infants
JAMA PEDIATRICS
2019; 173 (5): 455–61
View details for DOI 10.1001/jamapediatrics.2019.0241
View details for Web of Science ID 000467505200013
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Factors Associated with Successful First High-Risk Infant Clinic Visit for Very Low Birth Weight Infants in California.
The Journal of pediatrics
2019
Abstract
OBJECTIVES: To determine rates of at least 1 high-risk infant follow-up (HRIF) visit by 12months corrected age, and factors associated with successful first visit among very low birth weight (VLBW) infants in a statewide population-based setting.STUDY DESIGN: We used the linked California Perinatal Quality of Care Collaborative and California Perinatal Quality of Care Collaborative-California Children's Services HRIF databases. Multivariable logistic regression examined independent associations of maternal, sociodemographic, neonatal clinical, and HRIF program factors with a successful first HRIF visit among VLBW infants born in 2010-2011.RESULTS: Among 6512 VLBW children referred to HRIF, 4938 (76%) attended a first visit. Higher odds for first HRIF visit attendance was associated with older maternal age (OR, 1.48; 95% CI, 1.27-1.72; 30-39 vs 20-29years), lower birth weight (OR, 2.11; 95% CI, 1.69-2.65; ≤750g vs 1251-1499g), private insurance (OR, 1.65; 95% CI, 1.19-2.31), a history of severe intracranial hemorrhage (OR, 1.61; 95% CI, 1.12-2.30), 2 parents as primary caregivers (OR, 1.18, 95% CI 1.03-1.36), and higher HRIF program volume (OR, 2.62; 95% CI, 1.88-3.66; second vs lowest quartile); and lower odds with maternal race African American or black (OR, 0.65; 95% CI, 0.54-0.78), and greater distance to HRIF program (OR, 0.69; 95% CI, 0.57-0.83). Rates varied substantially across HRIF programs, which remained after risk adjustment.CONCLUSIONS: In a population-based California VLBW cohort, maternal, sociodemographic, and home- and program-level disparities were associated with HRIF non-attendance. These findings underscore the need to identify challenges in access and resource risk factors during hospitalization in the neonatal intensive care unit, provide enhanced education about the benefits of HRIF, and create comprehensive neonatal intensive care unit-to-home transition approaches.
View details for PubMedID 30967249
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Racial Segregation and Inequality in the Neonatal Intensive Care Unit for Very Low-Birth-Weight and Very Preterm Infants.
JAMA pediatrics
2019
Abstract
Importance: Racial and ethnic minorities receive lower-quality health care than white non-Hispanic individuals in the United States. Where minority infants receive care and the role that may play in the quality of care received is unclear.Objective: To determine the extent of segregation and inequality of care of very low-birth-weight and very preterm infants across neonatal intensive care units (NICUs) in the United States.Design, Setting, and Participants: This cohort study of 743 NICUs in the Vermont Oxford Network included 117 982 black, Hispanic, Asian, and white infants born at 401 g to 1500 g or 22 to 29 weeks' gestation from January 2014 to December 2016. Analysis began January 2018.Main Outcomes and Measures: The NICU segregation index and NICU inequality index were calculated at the hospital level as the Gini coefficients associated with the Lorenz curves for black, Hispanic, and Asian infants compared with white infants, with NICUs ranked by proportion of white infants for the NICU segregation index and by composite Baby-MONITOR (Measure of Neonatal Intensive Care Outcomes Research) score for the NICU inequality index.Results: Infants (36 359 black [31%], 21 808 Hispanic [18%], 5920 Asian [5%], and 53 895 white [46%]) were segregated among the 743 NICUs by race and ethnicity (NICU segregation index: black: 0.50 [95% CI, 0.46-0.53], Hispanic: 0.58 [95% CI, 0.54-0.61], and Asian: 0.45 [95% CI, 0.40-0.50]). Compared with white infants, black infants were concentrated at NICUs with lower-quality scores, and Hispanic and Asian infants were concentrated at NICUs with higher-quality scores (NICU inequality index: black: 0.07 [95% CI, 0.02-0.13], Hispanic: -0.10 [95% CI, -0.17 to -0.04], and Asian: -0.26 [95% CI, -0.32 to -0.19]). There was marked variation among the census regions in weighted mean NICU quality scores (range: -0.69 to 0.85). Region of residence explained the observed inequality for Hispanic infants but not for black or Asian infants.Conclusions and Relevance: Black, Hispanic, and Asian infants were segregated across NICUs, reflecting the racial segregation of minority populations in the United States. There were large differences between geographic regions in NICU quality. After accounting for these differences, compared with white infants, Asian infants received care at higher-quality NICUs and black infants, at lower-quality NICUs. Explaining these patterns will require understanding the effects of sociodemographic factors and public policies on hospital quality, access, and choice for minority women and their infants.
View details for PubMedID 30907924
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Cytomegalovirus Infection among Infants in Neonatal Intensive Care Units, California, 2005 to 2016.
American journal of perinatology
2019
Abstract
AIM: The main purpose of this article is to assess trends in cytomegalovirus (CMV) infection reported among infants in California neonatal intensive care units (NICUs) during 2005 to 2016.STUDY DESIGN: The California Perinatal Quality Care Collaborative collects data on all very low birth weight (VLBW, birth weight ≤ 1,500 g) and acutely ill infants>1,500g, representing 92% of NICUs in California. We compared clinical characteristics and length of hospital stay among infants with and without reported CMV infection (CMV-positive viral culture or polymerase chain reaction).RESULTS: During 2005 to 2016, CMV infection was reported in 174 VLBW infants and 145 infants>1,500g, or 2.7 (range: 1.5-4.7) and 1.2 (range: 0.8-1.7) per 1,000 infants, respectively (no significant annual trend). Among infants>1,500g, 12 (8%) versus 4,928 (4%) of those reported with versus without CMV infection died (p<0.05). The median hospital stay was significantly longer among infants reported with versus without CMV infection for both VLBW infants (98 vs. 46 days) and infants>1,500g (61 vs. 14 days) (p<0.001).CONCLUSION: Reports of CMV infection remained stable over a 12-year period. Although we were not able to assess whether infection was congenital or postnatal, CMV infection among infants>1,500g was associated with increased mortality.
View details for PubMedID 30895580
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Understanding health disparities
JOURNAL OF PERINATOLOGY
2019; 39 (3): 354–58
View details for DOI 10.1038/s41372-018-0298-1
View details for Web of Science ID 000459549600003
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Perinatal Risk Factors and Outcome Coding in Clinical and Administrative Databases
PEDIATRICS
2019; 143 (2)
View details for DOI 10.1542/peds.2018-1487
View details for Web of Science ID 000457458700010
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Perinatal Risk Factors and Outcome Coding in Clinical and Administrative Databases.
Pediatrics
2019
Abstract
BACKGROUND AND OBJECTIVES: Administrative databases may allow true population-based studies and quality improvement endeavors, but the accuracy of billing codes for capturing key risk factors and outcomes needs to be assessed. We sought to describe the performance of a statewide administrative database and the clinical database from the California Perinatal Quality Care Collaborative (CPQCC).METHODS: This population-based retrospective cohort study linked key perinatal risk factors and outcomes from the 133-unit CPQCC database to relevant billing codes from administrative maternal and newborn inpatient discharge records, for 50631 infants born from 2006 to 2012. Using the CPQCC record as the gold standard, we calculated the positive predictive value, negative predictive value, and Matthews correlation coefficient for each item, then evaluated comparative performance across units.RESULTS: The Matthews correlation coefficient was highest (>0.7; strong positive correlation) for multiple delivery, Cesarean delivery, very low birth weight, maternal hypertension, maternal diabetes, patent ductus arteriosus, in-hospital death, patent ductus arteriosus and retinopathy of prematurity surgeries, extracorporeal life support, and intraventricular hemorrhage. Maternal chorioamnionitis, fetal distress, retinopathy of prematurity staging, chronic lung disease, and pneumothorax were the least reliably coded. Maternal factors and delivery details were more reliably coded in the maternal inpatient record than the newborn inpatient record.CONCLUSIONS: Several important perinatal risk factors and outcomes are highly congruent between these administrative and clinical databases. Several subjective risk factors and outcomes are appropriate targets for data improvement initiatives. The ability for timely extraction of administrative inpatient data will be key to their usefulness in quality metrics.
View details for PubMedID 30626622
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Clinical deterioration during neonatal transport in California.
Journal of perinatology : official journal of the California Perinatal Association
2019
Abstract
Identify clinical factors, transport characteristics and transport time intervals associated with clinical deterioration during neonatal transport in California.Population-based database was used to evaluate 47,794 infants transported before 7 days after birth from 2007 to 2016. Log binomial regression was used to estimate relative risks.30.8% of infants had clinical deterioration. Clinical deterioration was associated with prematurity, delivery room resuscitation, severe birth defects, emergent transports, transports by helicopter and requests for delivery room attendance. When evaluating transport time intervals, time required for evaluation by the transport team was associated with increased risk of clinical deterioration. Modifiable transport intervals were not associated with increased risk.Our results suggest that high-risk infants are more likely to be unstable during transport. Coordination and timing of neonatal transport in California appears to be effective and does not seem to contribute to clinical deterioration despite variation in the duration of these processes.
View details for DOI 10.1038/s41372-019-0488-5
View details for PubMedID 31488902
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Birth Hospitalization Costs and Days of Care for Mothers and Neonates in California, 2009-2011
JOURNAL OF PEDIATRICS
2019; 204: 118-+
View details for DOI 10.1016/j.jpeds.2018.08.041
View details for Web of Science ID 000453785200023
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Neonatal transport in California: findings from a qualitative investigation.
Journal of perinatology : official journal of the California Perinatal Association
2019
Abstract
To identify characteristics of neonatal transport in California and which factors influence team performance.We led focus group discussions with 19 transport teams operating in California, interviewing 158 neonatal transport team members. Transcripts were analyzed using a thematic analysis approach.The composition of transport teams varied widely. There was strong thematic resonance to suggest that the nature of emergent neonatal transports is unpredictable and poses several significant challenges including staffing, ambulance availability, and administrative support. Teams reported dealing with this unpredictability by engaging in teamwork, gathering experience with staff at referral hospitals, planning for a wide variety of circumstances, specialized training, debriefing after events, and implementing quality improvement strategies.Our findings suggest potential opportunities for improvement in neonatal transport. Future research can explore the cost and benefits of strategies such as dedicated transport services, transfer centers, and telemedicine.
View details for DOI 10.1038/s41372-019-0409-7
View details for PubMedID 31270432
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Racial/Ethnic Disparities in Neonatal Intensive Care: A Systematic Review.
Pediatrics
2019
Abstract
Racial and ethnic disparities in health outcomes of newborns requiring care in the NICU setting have been reported. The contribution of NICU care to disparities in outcomes is unclear.To conduct a systematic review of the literature documenting racial/ethnic disparities in quality of care for infants in the NICU setting.Medline/PubMed, Scopus, Cumulative Index of Nursing and Allied Health, and Web of Science were searched until March 6, 2018, by using search queries organized around the following key concepts: "neonatal intensive care units," "racial or ethnic disparities," and "quality of care."English language articles up to March 6, 2018, that were focused on racial and/or ethnic differences in the quality of NICU care were selected.Two authors independently assessed eligibility, extracted data, and cross-checked results, with disagreements resolved by consensus. Information extracted focused on racial and/or ethnic disparities in quality of care and potential mechanism(s) for disparities.Initial search yielded 566 records, 470 of which were unique citations. Title and abstract review resulted in 382 records. Appraisal of the full text of the remaining 88 records, along with the addition of 5 citations from expert consult or review of bibliographies, resulted in 41 articles being included.Quantitative meta-analysis was not possible because of study heterogeneity.Overall, this systematic review revealed complex racial and/or ethnic disparities in structure, process, and outcome measures, most often disadvantaging infants of color, especially African American infants. There are some exceptions to this pattern and each area merits its own analysis and discussion.
View details for DOI 10.1542/peds.2018-3114
View details for PubMedID 31358664
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Newborn Antibiotic Exposures and Association With Proven Bloodstream Infection.
Pediatrics
2019
Abstract
To estimate the percentage of hospital births receiving antibiotics before being discharged from the hospital and efficiency diagnosing proven bloodstream infection.We conducted a cross-sectional study of 326 845 live births in 2017, with a 69% sample of all California births involving 121 California hospitals with a NICU, of which 116 routinely served inborn neonates. Exposure included intravenous or intramuscular antibiotic administered anywhere in the hospital during inpatient stay associated with maternal delivery. The main outcomes were the percent of newborns with antibiotic exposure and counts of exposed newborns per proven bloodstream infection. Units of observation and analysis were the individual hospitals. Correlation analyses included infection rates, surgical case volume, NICU inborn admission rates, and mortality rates.The percent of newborns with antibiotic exposure varied from 1.6% to 42.5% (mean 8.5%; SD 6.3%; median 7.3%). Across hospitals, 11.4 to 335.7 infants received antibiotics per proven early-onset sepsis case (mean 95.1; SD 71.1; median 69.5), and 2 to 164 infants received antibiotics per proven late-onset sepsis case (mean 19.6; SD 24.0; median 12.2). The percent of newborns with antibiotic exposure correlated neither with proven bloodstream infection nor with the percent of patient-days entailing antibiotic exposure.The percent of newborns with antibiotic exposure varies widely and is unexplained by proven bloodstream infection. Identification of sepsis, particularly early onset, often is extremely inefficient. Knowledge of the numbers of newborns receiving antibiotics complements evaluations anchored in days of exposure because these are uncorrelated measures.
View details for DOI 10.1542/peds.2019-1105
View details for PubMedID 31641017
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Understanding health disparities.
Journal of perinatology : official journal of the California Perinatal Association
2018
Abstract
Based upon our recent insights into the determinants of preterm birth, which is the leading cause of death in children under five years of age worldwide, we describe potential analytic frameworks that provides both a common understanding and, ultimately the basis for effective, ameliorative action. Our research on preterm birth serves as an example that the framing of any human health condition is a result of complex interactions between the genome and the exposome. New discoveries of the basic biology of pregnancy, such as the complex immunological and signaling processes that dictate the health and length of gestation, have revealed a complexity in the interactions (current and ancestral) between genetic and environmental forces. Understanding of these relationships may help reduce disparities in preterm birth and guide productive research endeavors and ultimately, effective clinical and public health interventions.
View details for PubMedID 30560947
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Birth Hospitalization Costs and Days of Care for Mothers and Neonates in California, 2009-2011.
The Journal of pediatrics
2018
Abstract
OBJECTIVE: To provide population-based estimates of the hospital-related costs of maternal and newborn care, and how these vary by gestational age and birth weight.STUDY DESIGN: We conducted a retrospective analysis of 2009-2011 California in-hospital deliveries at nonfederal hospitals with the infant and maternal discharge data successfully (96%) linked to birth certificates. Cost-to-charge ratios were used to estimate costs from charges. Physician hospital payments were estimated by mean diagnosis related group-specific reimbursement and costs were adjusted for inflation to December 2017 values. After exclusions for incomplete or missing data, the final sample was 1 265 212.RESULTS: The mean maternal costs for all in-hospital deliveries was $8204, increasing to $13 154 for late preterm (32-36 weeks) and $22 702 for very preterm (<32 weeks) mothers. The mean cost for all newborns was $6389: $2433 for term infants, $22 102 for late preterm, $223 931 for very preterm infants, and $317 982 for extremely preterm infants (<28 weeks). Preterm infants were 8.1% of cases but incurred 60.9% of costs; for very preterm and extremely preterm infants, these shares were 1.0% and 36.5%, and 0.4% and 20.0%, respectively. Overall, mothers incurred 56% of the total costs during the delivery hospitalization.CONCLUSIONS: Both maternal and neonatal costs are skewed, with this being much more pronounced for infants. Preterm birth is much more expensive than term delivery, with the additional costs predominately incurred by the infants. The small share of infants who require extensive stays in neonatal intensive care incur a large share of neonatal costs and these costs have increased over time.
View details for PubMedID 30297293
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Variations in Neonatal Antibiotic Use
PEDIATRICS
2018; 142 (3)
Abstract
We sought to identify whether and how the NICU antibiotic use rate (AUR), clinical correlates, and practice variation changed between 2013 and 2016 and attempted to identify AUR ranges that are consistent with objectively determined bacterial and/or fungal disease burdens.In a retrospective cohort study of >54 000 neonates annually at >130 California NICUs from 2013 to 2016, we computed nonparametric linear correlation and compared AURs among years using a 2-sample test of proportions. We stratified by level of NICU care and participation in externally organized stewardship efforts.By 2016, the overall AUR declined 21.9% (95% confidence interval [CI] 21.9%-22.0%), reflecting 42 960 fewer antibiotic days. Among NICUs in externally organized antibiotic stewardship efforts, the AUR declined 28.7% (95% CI 28.6%-28.8%) compared with 16.2% (95% CI 16.1%-16.2%) among others. The intermediate NICU AUR range narrowed, but the distribution of values did not shift toward lower values as it did for other levels of care. The 2016 AUR correlated neither with proven infection nor necrotizing enterocolitis. The 2016 regional NICU AUR correlated with surgical volume (ρ = 0.53; P = .01), mortality rate (ρ = 0.57; P = .004), and average length of stay (ρ = 0.62; P = .002) and was driven by 3 NICUs with the highest AUR values (30%-57%).Unexplained antibiotic use has declined but continues. Currently measured clinical correlates generally do not help explain AUR values that are above the lowest quartile cutpoint of 14.4%.
View details for PubMedID 30177514
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Never judge a book by its cover: how NICU evaluators reach conclusions about quality of care
JOURNAL OF PERINATOLOGY
2018; 38 (6): 751–58
View details for DOI 10.1038/s41372-018-0092-0
View details for Web of Science ID 000437240700022
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Improving Maternal Safety at Scale with the Mentor Model of Collaborative Improvement
JOINT COMMISSION JOURNAL ON QUALITY AND PATIENT SAFETY
2018; 44 (5): 250–59
Abstract
Obstetric safety bundles, consisting of action steps shown to improve outcomes, have been developed to address the most common and preventable causes of maternal morbidity and mortality. Implementing these best practices across all birthing facilities remains an important and challenging clinical and public health priority.The California Maternal Quality Care Collaborative (CMQCC) developed an innovative external mentor model for large-scale collaborative improvement in which participating organizations were subdivided into small teams of six to eight hospitals, led by a paired dyad of physician and nurse leaders. The mentor model preserves the active sharing that enhances improvement across a large group of facilities working on the same project while enabling individualized attention to teams. The mentor model was tested by implementing the obstetric hemorrhage safety bundle (which consists of 17 key practices in four domains) in multiple California hospitals.A total of 126 hospitals were engaged to simultaneously implement the safety bundle. The adoption rates for the recommended practices in the four action domains were (1) Readiness, 78.9%; (2) Recognition and Prevention, 76.5%; (3) Response, 63.1%; and (4) Reporting and Systems Learning, 58.7%. Mentors (31/40) and participating teams (48 responses from 39/126 hospitals) provided feedback in an exit survey. Among the respondents, 64.5% of mentors and 72.9% of participants agreed that compared to a traditional collaborative structure, the mentor model was better suited for quality improvement at scale.The mentor model was successful in providing individualized support to teams and enabled implementation of the hemorrhage safety bundle across a diverse group of 126 hospitals.
View details for DOI 10.1016/j.jcjq.2017.11.005
View details for Web of Science ID 000432378500003
View details for PubMedID 29759258
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Never judge a book by its cover: how NICU evaluators reach conclusions about quality of care.
Journal of perinatology : official journal of the California Perinatal Association
2018
Abstract
OBJECTIVE: To identify key features in the NICU care delivery context that influence quality of care delivery.STUDY DESIGN: Qualitative study using in-depth, semi-structured interviews with 10 NICU quality experts with extensive experience conducting NICU site visits and evaluating quality of care. Analyses were performed using the method of constant comparison based on grounded theory.RESULTS: Qualitative analysis yielded three major themes: (1) the foundation for high quality care is a cohesive unit culture, characterized by open communication, teamwork, and engagement of families; (2) effective linkages between measurement and improvement action is necessary for continuous improvement; and (3) NICU capacity for improvement is sustained by active support, exchange of skills, and resources from the hospital.CONCLUSIONS: Team cohesion, engagement of families, culture of improvement supported by measurement and institutional support from the hospital are some of the key contextual and managerial features critical to high-quality NICU care.
View details for PubMedID 29593356
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A genome-wide association study identifies only two ancestry specific variants associated with spontaneous preterm birth
SCIENTIFIC REPORTS
2018; 8: 226
Abstract
Preterm birth (PTB), or the delivery prior to 37 weeks of gestation, is a significant cause of infant morbidity and mortality. Although twin studies estimate that maternal genetic contributions account for approximately 30% of the incidence of PTB, and other studies reported fetal gene polymorphism association, to date no consistent associations have been identified. In this study, we performed the largest reported genome-wide association study analysis on 1,349 cases of PTB and 12,595 ancestry-matched controls from the focusing on genomic fetal signals. We tested over 2 million single nucleotide polymorphisms (SNPs) for associations with PTB across five subpopulations: African (AFR), the Americas (AMR), European, South Asian, and East Asian. We identified only two intergenic loci associated with PTB at a genome-wide level of significance: rs17591250 (P = 4.55E-09) on chromosome 1 in the AFR population and rs1979081 (P = 3.72E-08) on chromosome 8 in the AMR group. We have queried several existing replication cohorts and found no support of these associations. We conclude that the fetal genetic contribution to PTB is unlikely due to single common genetic variant, but could be explained by interactions of multiple common variants, or of rare variants affected by environmental influences, all not detectable using a GWAS alone.
View details for PubMedID 29317701
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Programmatic and Administrative Barriers to High-Risk Infant Follow-Up Care.
American journal of perinatology
2018; 35 (10): 940–45
Abstract
This article characterizes programmatic features of a population-based network of high-risk infant follow-up programs and identifies potential challenges associated with attendance from the providers' perspective. A web-based survey of high-risk infant follow-up program directors, coordinators, and providers of a statewide high-risk infant follow-up system. Frequencies and percentages were used to describe the survey responses. Of the 68 high-risk infant follow-up programs in California, 56 (82%) responded to the survey. The first visit no-show rate between 10 and 30% was estimated by 44% of programs with higher no-show rates for subsequent visits. Common strategies to remind families of appointments were phone calls and mailings. Most programs (54%) did not have a strategy to help families who lived distant to the high-risk infant follow-up clinic. High-risk infant follow-up programs may lack resources and effective strategies to enhance follow-up, particularly for those living at a distance.
View details for PubMedID 29439282
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Changing Trends in the Management of Patent Ductus Arteriosus for Very Low Birth Weight Infants
AMER ACAD PEDIATRICS. 2018
View details for DOI 10.1542/peds.141.1_MeetingAbstract.507
View details for Web of Science ID 000540809200511
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Quantitative Evaluation of the Structure of Neonatal Referral Networks in California
AMER ACAD PEDIATRICS. 2018
View details for DOI 10.1542/peds.141.1_MeetingAbstract.552
View details for Web of Science ID 000540809200559
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Racial/Ethnic Disparity in NICU Quality of Care Delivery
PEDIATRICS
2017; 140 (3)
View details for DOI 10.1542/peds.2017-0918
View details for Web of Science ID 000408820300034
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TIME OF BIRTH AND THE RISK OF SEVERE UNEXPECTED COMPLICATIONS IN TERM SINGLETON NEWBORNS
WILEY. 2017: 13
View details for Web of Science ID 000405213500016
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Network analysis: a novel method for mapping neonatal acute transport patterns in California.
Journal of perinatology
2017; 37 (6): 702-708
Abstract
The objectives of this study are to use network analysis to describe the pattern of neonatal transfers in California, to compare empirical sub-networks with established referral regions and to determine factors associated with transport outside the originating sub-network.This cross-sectional database study included 6546 infants <28 days old transported within California in 2012. After generating a graph representing acute transfers between hospitals (n=6696), we used community detection techniques to identify more tightly connected sub-networks. These empirically derived sub-networks were compared with state-defined regional referral networks. Reasons for transfer between empirical sub-networks were assessed using logistic regression.Empirical sub-networks showed significant overlap with regulatory regions (P<0.001). Transfer outside the empirical sub-network was associated with major congenital anomalies (P<0.001), need for surgery (P=0.01) and insurance as the reason for transfer (P<0.001).Network analysis accurately reflected empirical neonatal transfer patterns, potentially facilitating quantitative, rather than qualitative, analysis of regionalized health care delivery systems.Journal of Perinatology advance online publication, 23 March 2017; doi:10.1038/jp.2017.20.
View details for DOI 10.1038/jp.2017.20
View details for PubMedID 28333155
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Maternal prepregnancy body mass index and risk of bronchopulmonary dysplasia.
Pediatric research
2017
Abstract
BackgroundWe examined the relationship between women's prepregnancy BMI and development of bronchopulmonary dysplasia (BPD) in their preterm offspring, hypothesizing that obesity-associated inflammation may increase risk.MethodsWe studied infants born in California between 2007 and 2011, using linked data from California Perinatal Quality Care Collaborative neonatal intensive care units, hospital discharge, and vital statistics. We included infants with birthweight <1,500 g or gestational age at birth of 22-29 weeks. BPD was defined as continuous supplemental oxygen use at 36 weeks' postmenstrual age.ResultsAmong 12,621 infants, 4,078 (32%) had BPD. After adjustment for maternal race/ethnicity, age, education, payer source, and infant sex, BMI status underweight I (BMI <16.9, odds ratio (OR) 1.7, 95% confidence interval (CI) 1.3-2.1) and obesity III (BMI ⩾40.0, OR 1.3, 95% CI 1.0-1.6) were associated with an increased risk of BPD. When considering maternal BMI as a continuous variable, a nonlinear association with BPD was observed for male infants and infants delivered at 25-29 weeks of gestational age, but not for other subgroups.ConclusionBoth high and low maternal BMI were associated with increased BPD risk. These findings support the notion that BPD is a multi-factorial disease that may sometimes have its origins in utero and be influenced by maternal inflammation.Pediatric Research advance online publication, 31 May 2017; doi:10.1038/pr.2017.90.
View details for DOI 10.1038/pr.2017.90
View details for PubMedID 28399116
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Variation in quality report viewing by providers and correlation with NICU quality metrics.
Journal of perinatology
2017
Abstract
To examine variation in quality report viewing and assess correlation between provider report viewing and neonatal intensive care unit (NICU) quality.Variation in report viewing sessions for 129 California Perinatal Quality Care Collaborative NICUs was examined. NICUs were stratified into tertiles based on their antenatal steroid (ANS) use and hospital-acquired infection (HAI) rates to compare report viewing session counts.The number of report viewing sessions initiated by providers varied widely over a 2-year period (median=11; mean=25.5; s.d.=45.19 sessions). Report viewing was not associated with differences in ANS use. Facilities with low HAI rates had less frequent report viewing. Facilities with high report views had significant improvements in HAI rates over time.Available audit and feedback reports are utilized inconsistently across California NICUs despite evidence that report viewing is associated with improvements in quality of care delivery. Further studies are needed for reports to reach their theoretical potential.Journal of Perinatology advance online publication, 6 April 2017; doi:10.1038/jp.2017.44.
View details for DOI 10.1038/jp.2017.44
View details for PubMedID 28383536
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Trends in Patent Ductus Arteriosus Diagnosis and Management for Very Low Birth Weight Infants
PEDIATRICS
2017; 139 (4)
Abstract
To examine yearly trends of patent ductus arteriosus (PDA) diagnosis and treatment in very low birth weight infants.In this retrospective cohort study of very low birth weight infants (<1500 g) between 2008 and 2014 across 134 California hospitals, we evaluated PDA diagnosis and treatment by year of birth. Infants were either inborn or transferred in within 2 days after delivery and had no congenital abnormalities. Intervention levels for treatment administered to achieve ductal closure were categorized as none, pharmacologic (indomethacin or ibuprofen), both pharmacologic intervention and surgical ligation, or ligation only. Multivariable logistic regression was used to assess risk factors for PDA diagnosis and treatment.PDA was diagnosed in 42.8% (12 002/28 025) of infants, with a decrease in incidence from 49.2% of 4205 infants born in 2008 to 38.5% of 4001 infants born in 2014. Pharmacologic and/or surgical treatment was given to 30.5% of patients. Between 2008 and 2014, the annual rate of infants who received pharmacologic intervention (30.5% vs 15.7%) or both pharmacologic intervention and surgical ligation (6.9% vs 2.9%) decreased whereas infants who were not treated (60.5% vs 78.3%) or received primary ligation (2.2% vs 3.0%) increased.There is an increasing trend toward not treating patients diagnosed with PDA compared with more intensive treatments: pharmacologic intervention or both pharmacologic intervention and surgical ligation. Possible directions for future study include the impact of these trends on hospital-based and long-term outcomes.
View details for DOI 10.1542/peds.2016-2390
View details for Web of Science ID 000398602400016
View details for PubMedID 28562302
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Effects of delivery room quality improvement on premature infant outcomes
JOURNAL OF PERINATOLOGY
2017; 37 (4): 349-354
Abstract
Delivery room management interventions have been successfully implemented via collaborative quality improvement (QI) projects. However, it is unknown whether these successes translate to reductions in neonatal morbidity and mortality.This was a prospective pre-post intervention study of three nonrandomized hospital groups within the California Perinatal Quality Care Collaborative. A collaborative QI model (Collaborative QI) was compared with a single-site QI model (NICU QI) and a non-participant population when implementing evidence-based delivery room practices. The intervention period was between June 2011 and May 2012. Infants born with gestational age between 22 weeks 0 days and 29 weeks 6 days and birth weight ⩽1500 g were included. Outcomes were mortality and select morbidities (bronchopulmonary dysplasia (BPD), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP) and necrotizing enterocolitis (NEC)). Outcomes were compared between the baseline (January 2010 to May 2011) and post-intervention period (June 2012 to May 2013) within each comparison group.Ninety-five hospitals were included with 4222 infants in the baseline period and 4186 infants in the post-intervention period. The Collaborative QI group had significantly reduced odds of developing BPD post-intervention (odds ratio (OR) 0.8, 95% confidence interval (CI) 0.65 to 0.99) or composite BPD-death (OR 0.83, 95% CI 0.69 to 1.00). In both the Collaborative QI and non-participants there were also reductions in IVH, severe IVH, composite severe IVH-death, severe ROP and composite severe ROP-death.Hospitals dedicated to improving delivery room practices can impact neonatal outcomes.Journal of Perinatology advance online publication, 22 December 2016; doi:10.1038/jp.2016.237.
View details for DOI 10.1038/jp.2016.237
View details for Web of Science ID 000399264800007
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Reduction of severe maternal morbidity from hemorrhage using a state perinatal quality collaborative
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
2017; 216 (3)
Abstract
Obstetric hemorrhage is the leading cause of severe maternal morbidity and of preventable maternal mortality in the United States. The California Maternal Quality Care Collaborative developed a comprehensive quality improvement tool kit for hemorrhage based on the national patient safety bundle for obstetric hemorrhage and noted promising results in pilot implementation projects.We sought to determine whether these safety tools can be scaled up to reduce severe maternal morbidity in women with obstetric hemorrhage using a large maternal quality collaborative.We report on 99 collaborative hospitals (256,541 annual births) using a before-and-after model with 48 noncollaborative comparison hospitals (81,089 annual births) used to detect any systemic trends. Both groups participated in the California Maternal Data Center providing baseline and rapid-cycle data. Baseline period was the 48 months from January 2011 through December 2014. The collaborative started in January 2015 and the postintervention period was the 6 months from October 2015 through March 2016. We modified the Institute for Healthcare Improvement collaborative model for achieving breakthrough improvement to include the mentor model whereby 20 pairs of nurse and physician mentors experienced in quality improvement gave additional support to small groups of 6-8 hospitals. The national hemorrhage safety bundle served as the template for quality improvement action. The main outcome measurement was the composite Centers for Disease Control and Prevention severe maternal morbidity measure, for both the target population of women with hemorrhage and the overall delivery population. The rate of adoption of bundle elements was used as an indicator of hospital engagement and intensity.Compared to baseline period, women with hemorrhage in collaborative hospitals experienced a 20.8% reduction in severe maternal morbidity while women in comparison hospitals had a 1.2% reduction (P < .0001). Women in hospitals with prior hemorrhage collaborative experience experienced an even larger 28.6% reduction. Fewer mothers with transfusions accounted for two thirds of the reduction in collaborative hospitals and fewer procedures and medical complications, the remainder. The rate of severe maternal morbidity among all women in collaborative hospitals was 11.7% lower and women in hospitals with prior hemorrhage collaborative experience had a 17.5% reduction. Improved outcomes for women were noted in all hospital types (regional, medium, small, health maintenance organization, and nonhealth maintenance organization). Overall, 54% of hospitals completed 14 of 17 bundle elements, 76% reported regular unit-based drills, and 65% reported regular posthemorrhage debriefs. Higher rate of bundle adoption was associated with improvement of maternal morbidity only in hospitals with high initial rates of severe maternal morbidity.We used an innovative collaborative quality improvement approach (mentor model) to scale up implementation of the national hemorrhage bundle. Participation in the collaborative was strongly associated with reductions in severe maternal morbidity among hemorrhage patients. Women in hospitals in their second collaborative had an even greater reduction in morbidity than those approaching the bundle for the first time, reinforcing the concept that quality improvement is a long-term and cumulative process.
View details for DOI 10.1016/j.ajog.2017.01.017
View details for Web of Science ID 000397089700033
View details for PubMedID 28153661
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The Complex Relationship of Obesity and Spontaneous Preterm Birth.
SAGE PUBLICATIONS INC. 2017: 189A
View details for Web of Science ID 000399043900436
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What factors are related to recurrent preterm birth among underweight women?
journal of maternal-fetal & neonatal medicine
2017: 1-19
Abstract
Our objective was to identify factors associated with recurrent preterm birth among underweight women.Maternally linked hospital and birth certificate records of deliveries in California between 2007 and 2010 were used. Consecutive singleton pregnancies of women with underweight body mass index (BMI <18.5 kg/m(2)) in the first pregnancy were analyzed. Pregnancies were categorized based on outcome of the first and second birth as: term-term; term-preterm; preterm-term and preterm-preterm.We analyzed 4971 women with underweight BMI in the first pregnancy. Of these, 670 had at least one preterm birth. Among these 670, 86 (21.8%) women experienced a recurrent preterm birth. Odds for first term - second preterm birth were decreased for increases in maternal age (aOR: 0.90, 95%CI: 0.95-0.99) whereas inter-pregnancy interval <6 months was related to both first term - second preterm birth (aOR:1.66, 95%CI: 1.21-2.28) and first preterm birth - second term birth (aOR: 1.43, 95%CI: 1.04-1.96). Factors associated with recurrent preterm birth were: negative or no change in pre-pregnancy weight between pregnancies (aOR: 1.67, 95%CI: 1.07-2.60), inter-pregnancy interval <6 months (aOR: 2.14, 95%CI: 1.29-3.56), and maternal age in the first pregnancy (aOR: 0.93, 95%CI: 0.90-0.97).Recurrent preterm birth among underweight women was associated with younger age, short inter-pregnancy interval, and negative or no weight change between pregnancies.
View details for DOI 10.1080/14767058.2017.1292243
View details for PubMedID 28166677
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The Relationship of Nosocomial Infection Reduction to Changes in Neonatal Intensive Care Unit Rates of Bronchopulmonary Dysplasia
JOURNAL OF PEDIATRICS
2017; 180: 105-?
Abstract
To examine whether recent reductions in rates of nosocomial infection have contributed to changes in rates of bronchopulmonary dysplasia (BPD) in a population-based cohort.This was a retrospective, population-based cohort study that used the California Perinatal Quality Care Collaborative database from 2006 to 2013. Eligible infants included those less than 30 weeks' gestational age and less than 1500 g who survived to 3 days of life. Primary variables of interest were rates of nosocomial infections and BPD. Adjusted rates of nosocomial infections and BPD from a baseline period (2006-2010) were compared with a later period (2011-2013). The correlation of changes in rates across periods for both variables was assessed by hospital of care.A total of 22 967 infants from 129 hospitals were included in the study. From the first to second time period, the incidence of nosocomial infections declined from 24.7% to 15% and BPD declined from 35% to 30%. Adjusted hospital rates of BPD and nosocomial infections were correlated positively with a calculated 8% reduction of BPD rates attributable to reductions in nosocomial infections.Successful interventions to reduce rates of nosocomial infections may have a positive impact on other comorbidities such as BPD. The prevention of nosocomial infections should be viewed as a significant component in avoiding long-term neonatal morbidities.
View details for DOI 10.1016/j.jpeds.2016.09.030
View details for Web of Science ID 000390028100022
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Racial/Ethnic Disparity in NICU Quality of Care Delivery.
Pediatrics
2017
Abstract
Differences in NICU quality of care provided to very low birth weight (<1500 g) infants may contribute to the persistence of racial and/or ethnic disparity. An examination of such disparities in a population-based sample across multiple dimensions of care and outcomes is lacking.Prospective observational analysis of 18 616 very low birth weight infants in 134 California NICUs between January 1, 2010, and December 31, 2014. We assessed quality of care via the Baby-MONITOR, a composite indicator consisting of 9 process and outcome measures of quality. For each NICU, we calculated a risk-adjusted composite and individual component quality score for each race and/or ethnicity. We standardized each score to the overall population to compare quality of care between and within NICUs.We found clinically and statistically significant racial and/or ethnic variation in quality of care between NICUs as well as within NICUs. Composite quality scores ranged by 5.26 standard units (range: -2.30 to 2.96). Adjustment of Baby-MONITOR scores by race and/or ethnicity had only minimal effect on comparative assessments of NICU performance. Among subcomponents of the Baby-MONITOR, non-Hispanic white infants scored higher on measures of process compared with African Americans and Hispanics. Compared with whites, African Americans scored higher on measures of outcome; Hispanics scored lower on 7 of the 9 Baby-MONITOR subcomponents.Significant racial and/or ethnic variation in quality of care exists between and within NICUs. Providing feedback of disparity scores to NICUs could serve as an important starting point for promoting improvement and reducing disparities.
View details for PubMedID 28847984
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Association Between Neonatal Intensive Care Unit Admission Rates and Illness Acuity.
JAMA pediatrics
2017
Abstract
Most neonates admitted to a neonatal intensive care unit (NICU) are born at gestational age (GA) of 34 weeks or more. The degree of uniformity of admission criteria for these infants is unclear, particularly at the low-acuity end of the range of conditions warranting admission.To describe variation in NICU admission rates for neonates born at GA of 34 weeks or more and examine whether such variation is associated with high illness acuity or designated facility level of care.Cross-sectional study of 35 921 NICU inborn admissions of GA at 34 weeks or more during calendar year 2015, using a population database of inborn NICU admissions at 130 of the 149 hospitals in California with a NICU. The aggregate service population comprised 358 453 live births. The individual NICU was the unit of observation and analysis. The analysis was stratified by designated facility level of care and correlations with the percentage admissions with high illness acuity were explored. The hypothesis at the outset of the study was that inborn admission rates would correlate positively with the percentage of admissions with high illness acuity.Live birth at GA of 34 weeks or more.Inborn NICU admission rate.Of the total of 358 453 live births at GA of 34 weeks or more, 35 921 infants were admitted to a NICU and accounted for 79.2% of all inborn NICU admissions; 4260 (11.9%) of these admissions met high illness acuity criteria. Inborn admission rates varied 34-fold, from 1.1% to 37.7% of births (median, 9.7%; mean [SD], 10.6% [5.8%]). Percentage with high illness acuity varied 40-fold, from 2.4% to 95% (median, 11.3%; mean, 13.2% [9.9%]). Inborn admission rate correlated inversely with percentage of admissions with high illness acuity (Spearman ρ = -0.3034, P < .001). Among regional NICUs capable of caring for patients with the highest degree of illness and support needs, inborn admission rate did not significantly correlate with percentage of admissions with high illness acuity (Spearman ρ = -0.21, P = .41).Percentage of admissions with high illness acuity does not explain 34-fold variation in NICU inborn admission rates for neonates born at GA of 34 weeks or more. The findings are consistent with a supply-sensitive care component and invite future investigation to clarify the lower-acuity end of the range of conditions considered to warrant neonatal intensive care.
View details for PubMedID 29181499
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Opportunities for maternal transport for delivery of very low birth weight infants
JOURNAL OF PERINATOLOGY
2017; 37 (1): 32-35
Abstract
To assess frequency of very low birth weight (VLBW) births at non-level III hospitals.Retrospective cohort study using linked California birth certificate and discharge data of 2008 to 2010 for deliveries of singleton or first-born infant of multiple gestations with birth weight 400 to 1500 g. Delivery rates by neonatal level of care were obtained. Risk of delivery at non-level III centers was estimated in univariable and multivariable models.Of the 1 508 143 births, 13 919 (9.2%) were VLBW; birth rate at non-level III centers was 14.9% (8.4% in level I and 6.5% in level II). Median rate of VLBW births was 0.3% (range 0 to 4.7%) annually at level I and 0.5% (range 0 to 1.6%) at level II hospitals. Antepartum stay for >24 h occurred in 14.0% and 26.9% of VLBW births in level I and level II hospitals, respectively.Further improvement is possible in reducing VLBW infant delivery at suboptimal sites, given the window of opportunity for many patients.Journal of Perinatology advance online publication, 29 September 2016; doi:10.1038/jp.2016.174.
View details for DOI 10.1038/jp.2016.174
View details for Web of Science ID 000391517000007
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Effects of delivery room quality improvement on premature infant outcomes.
Journal of perinatology
2016
Abstract
Delivery room management interventions have been successfully implemented via collaborative quality improvement (QI) projects. However, it is unknown whether these successes translate to reductions in neonatal morbidity and mortality.This was a prospective pre-post intervention study of three nonrandomized hospital groups within the California Perinatal Quality Care Collaborative. A collaborative QI model (Collaborative QI) was compared with a single-site QI model (NICU QI) and a non-participant population when implementing evidence-based delivery room practices. The intervention period was between June 2011 and May 2012. Infants born with gestational age between 22 weeks 0 days and 29 weeks 6 days and birth weight ⩽1500 g were included. Outcomes were mortality and select morbidities (bronchopulmonary dysplasia (BPD), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP) and necrotizing enterocolitis (NEC)). Outcomes were compared between the baseline (January 2010 to May 2011) and post-intervention period (June 2012 to May 2013) within each comparison group.Ninety-five hospitals were included with 4222 infants in the baseline period and 4186 infants in the post-intervention period. The Collaborative QI group had significantly reduced odds of developing BPD post-intervention (odds ratio (OR) 0.8, 95% confidence interval (CI) 0.65 to 0.99) or composite BPD-death (OR 0.83, 95% CI 0.69 to 1.00). In both the Collaborative QI and non-participants there were also reductions in IVH, severe IVH, composite severe IVH-death, severe ROP and composite severe ROP-death.Hospitals dedicated to improving delivery room practices can impact neonatal outcomes.Journal of Perinatology advance online publication, 22 December 2016; doi:10.1038/jp.2016.237.
View details for DOI 10.1038/jp.2016.237
View details for PubMedID 28005062
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Characteristics of neonatal transports in California
JOURNAL OF PERINATOLOGY
2016; 36 (12): 1122-1127
Abstract
To describe the current scope of neonatal inter-facility transports.California databases were used to characterize infants transported in the first week after birth from 2009 to 2012.Transport of the 22 550 neonates was classified as emergent 9383 (41.6%), urgent 8844 (39.2%), scheduled 2082 (9.2%) and other 85 (0.4%). In addition, 2152 (9.5%) were initiated for delivery attendance. Most transports originated from hospitals without a neonatal intensive care unit (68%), with the majority transferred to regional centers (66%). Compared with those born and cared for at the birth hospital, the odds of being transported were higher if the patient's mother was Hispanic, <20 years old, or had a previous C-section. An Apgar score <3 at 10 min of age, cardiac compressions in the delivery room, or major birth defect were also risk factors for neonatal transport.As many neonates receive transport within the first week after birth, there may be opportunities for quality improvement activities in this area.Journal of Perinatology advance online publication, 29 September 2016; doi:10.1038/jp.2016.102.
View details for DOI 10.1038/jp.2016.102
View details for Web of Science ID 000389735700019
View details for PubMedID 27684413
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Women's prepregnancy underweight as a risk factor for preterm birth: a retrospective study.
bjog-an international journal of obstetrics and gynaecology
2016; 123 (12): 2001-2007
Abstract
To investigate the distribution of known factors for preterm birth (PTB) by severity of maternal underweight; to investigate the risk-adjusted relation between severity of underweight and PTB, and to assess whether the relation differed by gestational age.Retrospective cohort study.State of California, USA.Maternally linked hospital and birth certificate records of 950 356 California deliveries in 2007-2010 were analysed. Singleton live births of women whose prepregnancy body mass index (BMI) was underweight (<18.5 kg/m(2) ) or normal (18.50-24.99 kg/m(2) ) were analysed. Underweight BMI was further categorised as: severe (<16.00), moderate (16.00-16.99) or mild (17.00-18.49). PTB was grouped as 22-27, 28-31, 32-36 or <37 weeks (compared with 37-41 weeks). Adjusted multivariable Poisson regression modeling was used to estimate relative risk for PTB.Risk of PTB.About 72 686 (7.6%) women were underweight. Increasing severity of underweight was associated with increasing percent PTB: 7.8% (n = 4421) in mild, 9.0% (n = 1001) in moderate and 10.2% (475) in severe underweight. The adjusted relative risk of PTB also significantly increased: adjusted relative risk (aRR) = 1.22 (95% CI 1.19-1.26) in mild, aRR = 1.41 (95% CI 1.32-1.50) in moderate and aRR = 1.61 (95% CI 1.47-1.76) in severe underweight. These findings were similar in spontaneous PTB, medically indicated PTB, and the gestational age groupings.Increasing severity of maternal prepregnancy underweight BMI was associated with increasing risk-adjusted PTB at <37 weeks. This increasing risk was of similar magnitude in spontaneous and medically indicated births and in preterm delivery at 28-31 and at 32-36 weeks of gestation.Increasing severity of maternal underweight BMI was associated with increasing risk of preterm birth.
View details for DOI 10.1111/1471-0528.14027
View details for PubMedID 27172996
View details for PubMedCentralID PMC5069076
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The Relationship of Nosocomial Infection Reduction to Changes in Neonatal Intensive Care Unit Rates of Bronchopulmonary Dysplasia.
journal of pediatrics
2016
Abstract
To examine whether recent reductions in rates of nosocomial infection have contributed to changes in rates of bronchopulmonary dysplasia (BPD) in a population-based cohort.This was a retrospective, population-based cohort study that used the California Perinatal Quality Care Collaborative database from 2006 to 2013. Eligible infants included those less than 30 weeks' gestational age and less than 1500 g who survived to 3 days of life. Primary variables of interest were rates of nosocomial infections and BPD. Adjusted rates of nosocomial infections and BPD from a baseline period (2006-2010) were compared with a later period (2011-2013). The correlation of changes in rates across periods for both variables was assessed by hospital of care.A total of 22 967 infants from 129 hospitals were included in the study. From the first to second time period, the incidence of nosocomial infections declined from 24.7% to 15% and BPD declined from 35% to 30%. Adjusted hospital rates of BPD and nosocomial infections were correlated positively with a calculated 8% reduction of BPD rates attributable to reductions in nosocomial infections.Successful interventions to reduce rates of nosocomial infections may have a positive impact on other comorbidities such as BPD. The prevention of nosocomial infections should be viewed as a significant component in avoiding long-term neonatal morbidities.
View details for DOI 10.1016/j.jpeds.2016.09.030
View details for PubMedID 27742123
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Extreme hyperbilirubinemia and rescue exchange transfusion in California from 2007 to 2012.
Journal of perinatology
2016; 36 (10): 853-857
Abstract
To evaluate the impact of statewide learning collaboratives that used national guidelines to manage jaundice on the serial prevalence of extreme hyperbilirubinemia (EHB, total bilirubin ⩾25 mg dl(-1)) and exchange transfusions introduced in California Perinatal Quality Care Collaborative (CPQCC) hospitals in 2007.Adverse outcomes were retrieved from statewide databases on re-admissions for live births ⩾35 weeks' gestation (2007 to 2012) in diverse CPQCC hospitals. Individual and cumulative select perinatal risk factors and frequencies were the outcomes measures.For 3 172 762 babies (2007 to 2012), 92.5% were ⩾35 weeks' gestation. Statewide EHB and exchange rates decreased from 28.2 to 15.3 and 3.6 to 1.9 per 100 000 live births, respectively. From 2007 to 2012, the trends for TB>25 mg dl(-1) rates were -0.92 per 100 000 live births per year (95% CI: -3.71 to 1.87, P=0.41 and R(2)=0.17).National guidelines complemented by statewide learning collaboratives can decrease or modify outcomes among all birth facilities and impact clinical practice behavior.
View details for DOI 10.1038/jp.2016.106
View details for PubMedID 27442156
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Opportunities for maternal transport for delivery of very low birth weight infants.
Journal of perinatology
2016
Abstract
To assess frequency of very low birth weight (VLBW) births at non-level III hospitals.Retrospective cohort study using linked California birth certificate and discharge data of 2008 to 2010 for deliveries of singleton or first-born infant of multiple gestations with birth weight 400 to 1500 g. Delivery rates by neonatal level of care were obtained. Risk of delivery at non-level III centers was estimated in univariable and multivariable models.Of the 1 508 143 births, 13 919 (9.2%) were VLBW; birth rate at non-level III centers was 14.9% (8.4% in level I and 6.5% in level II). Median rate of VLBW births was 0.3% (range 0 to 4.7%) annually at level I and 0.5% (range 0 to 1.6%) at level II hospitals. Antepartum stay for >24 h occurred in 14.0% and 26.9% of VLBW births in level I and level II hospitals, respectively.Further improvement is possible in reducing VLBW infant delivery at suboptimal sites, given the window of opportunity for many patients.Journal of Perinatology advance online publication, 29 September 2016; doi:10.1038/jp.2016.174.
View details for DOI 10.1038/jp.2016.174
View details for PubMedID 27684426
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Body Mass Index Change between Pregnancies and Risk of Spontaneous Preterm Birth.
American journal of perinatology
2016; 33 (10): 1017-1022
Abstract
Objective Studies have reported an increased risk of spontaneous preterm birth associated with elevated prepregnancy body mass index (BMI) among nulliparous but not multiparous women. We examined whether changes in BMI and weight between pregnancies contributed to risk of preterm birth among obese (BMI > 29 kg/m(2)) women. Study Design This study utilized maternally linked California birth records of sequential singleton births between 2007 and 2010. Preterm birth was defined as 20 to 31 or 32 to 36 weeks of gestation. BMI was examined as category change and by tertile of weight change. Primary analyses included women without diabetes or hypertensive disorders; these women were compared with those without prior preterm birth, women with preterm deliveries preceded by spontaneous preterm labor, and women without any exclusions (i.e., diabetes or hypertensive disorders). Results Analyses showed that obesity was not associated with increased risk of spontaneous preterm birth among multiparous women. Women whose BMI increased had a decreased risk of spontaneous preterm birth at 32 to 36 weeks. Change in BMI or weight between pregnancies did not substantively alter results. Conclusion Among multiparous women, obesity was associated with reduced risk of spontaneous preterm delivery. This observed association is complex and may be influenced by maternal age, gestational age, placental insufficiency, and altered immune response.
View details for DOI 10.1055/s-0036-1572533
View details for PubMedID 27128743
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Inhaled nitric oxide use in preterm infants in California neonatal intensive care units.
Journal of perinatology
2016; 36 (8): 635-639
Abstract
To describe inhaled nitric oxide (iNO) exposure in preterm infants and variation in neonatal intensive care unit (NICU) use.This was a retrospective cohort study of infants, 22 to 33+6/7 weeks of gestational age (GA), during 2005 to 2013. Analyses were stratified by GA and included population characteristics, iNO use over time and hospital variation.Of the 65 824 infants, 1718 (2.61%) received iNO. Infants, 22 to 24+6/7 weeks of GA, had the highest incidence of iNO exposure (6.54%). Community NICUs (n=77, median hospital use rate 0.7%) used less iNO than regional NICUs (n=23, median hospital use rate 5.8%). In 22 to 24+6/7 weeks of GA infants, the median rate in regional centers was 10.6% (hospital interquartile range 3.8% to 22.6%).iNO exposure varied with GA and hospital level, with the most use in extremely premature infants and regional centers. Variation reflects a lack of consensus regarding the appropriate use of iNO for preterm infants.Journal of Perinatology advance online publication, 31 March 2016; doi:10.1038/jp.2016.49.
View details for DOI 10.1038/jp.2016.49
View details for PubMedID 27031320
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Confirmed severe maternal morbidity is associated with high rate of preterm delivery.
American journal of obstetrics and gynecology
2016; 215 (2): 233 e1-7
Abstract
Because severe maternal morbidity (SMM) is increasing in the United States, affecting up to 50,000 women per year, there was a recent call to review all mothers with SMM to better understand their morbidity and improve outcomes. Administrative screening methods for SMM have recently been shown to have low positive predictive value for true SMM after chart review. To ultimately reduce maternal morbidity and mortality we must better understand risk factors, and preventability issues about true SMM such that interventions could be designed to improve care.Our objective was to determine risk factors associated with true SMM identified from California delivery admissions, including the relationship between SMM and preterm delivery.In this retrospective cohort study, SMM cases were screened for using International Classification of Diseases, Ninth Revision codes for severe illness and procedures, prolonged postpartum length of stay, intensive care unit admission, and transfusion from all deliveries in 16 hospitals from July 2012 through June 2013. Charts of screen-positive cases were reviewed and true SMM diagnosed based on expert panel agreement. Underlying disease diagnosis was determined. Women with true-positive SMM were compared to SMM-negative women for the following variables: maternal age, ethnicity, gestational age at delivery, prior cesarean delivery, and multiple gestation.In all, 491 women had true SMM and 66,977 women did not have SMM for a 0.7% rate of true SMM. Compared to SMM-negative women, SMM cases were significantly more likely to be age >35 years (33.6 vs 23.8%; P < .0001), be African American (14.1 vs 7.9%; P < .0001), have had a multiple gestation (9.7 vs 2.1%; P < .0001), and, for the multiparous women, have had a prior cesarean delivery (58 vs 30.2%; P < .0001). Preterm delivery was significantly more common in SMM women compared to SMM-negative women (41 vs 8%; P < .0001), including delivery <32 weeks (18 vs 2%; P < .0001). The most common underlying disease was obstetric hemorrhage (42%) followed by hypertensive disorders (20%) and placental hemorrhage (14%). Only 1.6% of women with SMM had cardiovascular disease as the underlying disease category.An extremely high proportion of women with severe morbidity (42.5%) delivered preterm with 17.8% delivering <32 weeks, which underscores the importance of access to appropriate-level care for mothers with SMM and their newborns. Further, the extremely high rate of preterm delivery (75%) in women with placental hemorrhage in combination with their 63% prior cesarean delivery rate highlights another risk of prior cesarean delivery: subsequent preterm delivery. These data provide a reminder that a cesarean delivery could be a contributing factor to not only hemorrhage-related SMM, but also to increased subsequent preterm delivery, more reason to continue national efforts to safely reduce initial cesarean deliveries.
View details for DOI 10.1016/j.ajog.2016.02.026
View details for PubMedID 26899903
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Estimating Length of Stay by Patient Type in the Neonatal Intensive Care Unit
AMERICAN JOURNAL OF PERINATOLOGY
2016; 33 (8): 751-757
Abstract
Objective Develop length of stay prediction models for neonatal intensive care unit patients. Study Design We used data from 2008 to 2010 to construct length of stay models for neonates admitted within 1 day of age to neonatal intensive care units and surviving to discharge home. Results Our sample included 23,551 patients. Median length of stay was 79 days when birth weight was < 1,000 g, 46 days for 1,000 to 1,500 g, 21 days for 1,500 to 2,500 g, and 8 days for ≥2,500 g. Risk factors for longer length of stay varied by weight. Units with shorter length of stay for one weight group had shorter lengths of stay for other groups. Conclusion Risk models for comparative assessments of length of stay need to appropriately account for weight, particularly considering the cutoff of 1,500 g. Refining prediction may benefit counseling of families and health care systems to efficiently allocate resources.
View details for DOI 10.1055/s-0036-1572433
View details for PubMedID 26890437
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Impact of antenatal steroids on intraventricular hemorrhage in very-low-birth weight infants
JOURNAL OF PERINATOLOGY
2016; 36 (5): 352-356
Abstract
To determine the association between antenatal steroids administration and intraventricular hemorrhage rates.We used cross-sectional data from the California Perinatal Quality Care Collaborative during 2007 to 2013 for infants ⩽32 weeks gestational age. Using multivariable logistic regression, we evaluated the effect of antenatal steroids on intraventricular hemorrhage, stratified by gestational age.In 25 979 very-low-birth weight infants, antenatal steroid use was associated with a reduction in incidence of any grade of intraventricular hemorrhage (odds ratio=0.68, 95% confidence interval: 0.62, 0.75) and a reduction in incidence of severe intraventricular hemorrhage (odds ratio=0.51, 95% confidence interval: 0.45, 0.58). This association was seen across gestational ages ranging from 22 to 29 weeks.Although current guidelines recommend coverage for preterm birth at 24 to 34 weeks gestation, our results suggest that treatment with antenatal steroids may be beneficial even before 24 weeks of gestational age.
View details for DOI 10.1038/jp.2016.38
View details for Web of Science ID 000374914900006
View details for PubMedID 27010109
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Measuring severe maternal morbidity: validation of potential measures
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
2016; 214 (5)
Abstract
Both maternal mortality rate and severe maternal morbidity rate have risen significantly in the United Sates. Recently, the Centers for Disease Control and Prevention introduced International Classification of Diseases, 9th revision, criteria for defining severe maternal morbidity with the use of administrative data sources; however, those criteria have not been validated with the use of chart reviews.The primary aim of the current study was to validate the Centers for Disease Control and Prevention International Classification of Diseases, 9th revision, criteria for the identification of severe maternal morbidity. This analysis initially required the development of a reproducible set of clinical conditions that were judged to be consistent with severe maternal morbidity to be used as the clinical gold standard for validation. Alternative criteria for severe maternal morbidity were also examined.The 67,468 deliveries that occurred during a 12-month period from 16 participating California hospitals were screened initially for severe maternal morbidity with the presence of any of 4 criteria: (1) Centers for Disease Control and Prevention International Classification of Diseases, 9th revision, diagnosis and procedure codes; (2) prolonged postpartum length of stay (>3 standard deviations beyond the mean length of stay for the California population); (3) any maternal intensive care unit admissions (with the use of hospital billing sources); and (4) the administration of any blood product (with the use of transfusion service data). Complete medical records for all screen-positive cases were examined to determine whether they satisfied the criteria for the clinical gold standard (determined by 4 rounds of a modified Delphi technique). Descriptive and statistical analyses that included area under the receiver operating characteristic curve and C-statistic were performed.The Centers for Disease Control and Prevention International Classification of Diseases, 9th revision, criteria had a reasonably high sensitivity of 0.77 and a positive predictive value of 0.44 with a C-statistic of 0.87. The most important source of false-positive cases were mothers whose only criterion was 1-2 units of blood products. The Centers for Disease Control and Prevention International Classification of Diseases, 9th revision, criteria screen rate ranged from 0.51-2.45% among hospitals. True positive severe maternal morbidity ranged from 0.05-1.13%. When hospitals were grouped by their neonatal intensive care unit level of care, severe maternal morbidity rates were statistically lower at facilities with lower level neonatal intensive care units (P < .0001).The Centers for Disease Control and Prevention International Classification of Diseases, 9th revision, criteria can serve as a reasonable administrative metric for measuring severe maternal morbidity at population levels. Caution should be used with the use of these criteria for individual hospitals, because case-mix effects appear to be strong.
View details for DOI 10.1016/j.ajog.2015.11.004
View details for Web of Science ID 000375452100025
View details for PubMedID 26582168
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Labor outcome at extremely advanced maternal age.
American journal of obstetrics and gynecology
2016; 214 (3): 362 e1-7
Abstract
Women of advanced maternal age (AMA) are at increased risk for cesarean delivery compared to non-AMA women. However, it is unclear whether how this association is altered by parity and the presence or absence of a trial of labor.We sought to examine modes of delivery and maternal outcomes among AMA women stratified by parity and the presence or absence of a trial of labor.This is a retrospective cohort study of all women delivering singletons births at ≥20 weeks' gestation in the state of California from 2007 through 2011. Data were extracted from maternal discharge data linked to infant birth certificate records. We compared non-AMA women (age 20-34 years, reference group) to AMA women who were classified as follows: age 35-39, 40-44, 45-49, and ≥50 years). The primary outcome was route of delivery (cesarean vs vaginal) stratified by parity and whether a trial of labor occurred (prelabor vs intrapartum cesarean delivery). The association between a trial of labor and perinatal morbidity was also studied.There were 1,346,889 women who met inclusion criteria, which included 181 (0.01%) women who were age ≥50 years at the time of delivery. Overall, 34.7% underwent a cesarean delivery and this risk differed significantly by age group (30.5%, 20-34 years; 40.5%, 35-39 years; 47.3%, 40-44 years; 55.6%, 45-49 years; 62.4%, >50 years). Nulliparous women age ≥50 years were significantly less likely to undergo a trial of labor compared to the reference group (relative risk [RR], 0.44; 95% confidence interval [CI], 0.32-0.62). Furthermore, nulliparous women age ≥50 years were significantly more likely to experience an intrapartum cesarean delivery (RR, 2.61; 95% CI, 1.31-5.20), however the majority (74%) who underwent a trial of labor experienced a vaginal delivery. Compared to the reference group, women age ≥50 years were 5 times more likely to experience severe maternal morbidity (1.7% vs 0.3%; RR, 5.08; 95% CI, 1.65-15.61) and their infants 3 times more likely to require neonatal intensive care unit admission (14.9% vs 5.2%; RR, 3.1; 95% CI, 2.2-4.4), however these outcomes were not associated significantly with having undergone a trial of labor, a cesarean delivery following labor, or a prelabor cesarean delivery. Similar trends were observed among multiparous women.Compared to non-AMA women, women age ≥50 years with a singleton pregnancy experience significantly higher rates of cesarean delivery. However the majority of those who undergo a trial of labor will have a vaginal delivery. Neither a trial of labor nor a prelabor cesarean delivery is significantly associated with maternal or neonatal morbidity. These data support either approach in women of extremely AMA.
View details for DOI 10.1016/j.ajog.2015.09.103
View details for PubMedID 26454124
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Impact of Donor Milk Availability on Breast Milk Use and Necrotizing Enterocolitis Rates.
Pediatrics
2016; 137 (3): 1-8
Abstract
To examine the availability of donor human milk (DHM) in a population-based cohort and assess whether the availability of DHM was associated with rates of breast milk feeding at NICU discharge and rates of necrotizing enterocolitis (NEC).Individual patient clinical data for very low birth weight infants from the California Perinatal Quality Care Collaborative were linked to hospital-level data on DHM availability from the Mothers' Milk Bank of San José for 2007 to 2013. Trends of DHM availability were examined by level of NICU care. Hospitals that transitioned from not having DHM to having DHM availability during the study period were examined to assess changes in rates of breast milk feeding at NICU discharge and NEC.The availability of DHM increased from 27 to 55 hospitals during the study period. The availability increased for all levels of care including regional, community, and intermediate NICUs, with the highest increase occurring in regional NICUs. By 2013, 81.3% of premature infants cared for in regional NICUs had access to DHM. Of the 22 hospitals that had a clear transition to having availability of DHM, there was a 10% increase in breast milk feeding at NICU discharge and a concomitant 2.6% decrease in NEC rates.The availability of DHM has increased over time and has been associated with positive changes including increased breast milk feeding at NICU discharge and decrease in NEC rates.
View details for DOI 10.1542/peds.2015-3123
View details for PubMedID 26908696
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The Association of Level of Care With NICU Quality.
Pediatrics
2016; 137 (3): 1-9
Abstract
Regionalized care delivery purportedly optimizes care to vulnerable very low birth weight (VLBW; <1500 g) infants. However, a comprehensive assessment of quality of care delivery across different levels of NICUs has not been done.We conducted a cross-sectional analysis of 21 051 VLBW infants in 134 California NICUs. NICUs designated their level of care according to 2012 American Academy of Pediatrics guidelines. We assessed quality of care delivery via the Baby-MONITOR, a composite indicator, which combines 9 risk-adjusted measures of quality. Baby-MONITOR scores are measured as observed minus expected performance, expressed in standard units with a mean of 0 and an SD of 1.Wide variation in Baby-MONITOR scores exists across California (mean [SD] 0.18 (1.14), range -2.26 to 3.39). However, level of care was not associated with overall quality scores. Subcomponent analysis revealed trends for higher performance of Level IV NICUs on several process measures, including antenatal steroids and any human milk feeding at discharge, but lower scores for several outcomes including any health care associated infection, pneumothorax, and growth velocity. No other health system or organizational factors including hospital ownership, neonatologist coverage, urban or rural location, and hospital teaching status, were significantly associated with Baby-MONITOR scores.The comprehensive assessment of the effect of level of care on quality reveals differential opportunities for improvement and allows monitoring of efforts to ensure that fragile VLBW infants receive care in appropriate facilities.
View details for DOI 10.1542/peds.2014-4210
View details for PubMedID 26908663
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HOSPITAL MANAGEMENT OF PATENT DUCTUS ARTERIOSUS IN CALIFORNIA
LIPPINCOTT WILLIAMS & WILKINS. 2016: 315
View details for DOI 10.1136/jim-d-15-00013.415
View details for Web of Science ID 000368699600423
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Effects of race/ethnicity and BMI on the association between height and risk for spontaneous preterm birth.
American journal of obstetrics and gynecology
2015; 213 (5): 700 e1-9
Abstract
Short height and obesity have each been associated with increased risk for preterm birth (PTB). However, the effect of short height on PTB risk, across different race/ethnicities and body mass index (BMI) categories, has not been studied. Our objective was to determine the influence of maternal height on the risk for PTB within race/ethnic groups, BMI groups, or adjusted for weight.All California singleton live births from 2007 through 2010 were included from birth certificate data (vital statistics) linked to hospital discharge data. Prepregnancy BMI (kg/m(2)) was categorized as underweight (<18.5), normal (18.5-24.9), overweight (25.0-29.9), or obese (≥30.0). Maternal race/ethnicity was categorized as: non-Hispanic white, non-Hispanic black, Hispanic, and Asian. Maternal height was classified into 5 categories (shortest, short, middle, tall, tallest) based on racial/ethnic-specific height distributions, with the middle category serving as reference. Poisson regression models were used to estimate relative risks for the association between maternal height and risk of spontaneous PTB (<37 weeks and <32 weeks). Models were stratified on race/ethnicity and BMI. Generalized additive regression models were used to detect nonlinearity of the association. Covariates considered were: maternal age, weight, parity, prenatal care, education, medical payment, previous PTB, gestational and pregestational diabetes, pregestational hypertension, preeclampsia/eclampsia, and smoking.Among 1,655,385 California singleton live births, 5.2% were spontaneous PTB <37 weeks. Short stature (first height category) was associated with increased risk for PTB for non-Hispanic whites and Hispanics across all BMI categories. Among obese women, tall stature (fifth category) was associated with reduced risk for spontaneous PTB for non-Hispanic whites, Asians, and Hispanics. The same pattern of association was seen for height and risk for spontaneous PTB <32 weeks. In the generalized additive regression model plots, short stature was associated with increased risk for spontaneous PTB of <32 and <37 weeks of gestation among whites and Asians. However, this association was not observed for blacks and Hispanics.Maternal shorter height is associated with a modest increased risk for spontaneous PTB regardless of BMI. Our results suggest that PTB risk assessment should consider race/ethnicity-specific height with respect to the norm in addition to BMI assessment.
View details for DOI 10.1016/j.ajog.2015.07.005
View details for PubMedID 26187451
View details for PubMedCentralID PMC4631690
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Role of infant sex in the association between air pollution and preterm birth
ANNALS OF EPIDEMIOLOGY
2015; 25 (11): 874-876
View details for DOI 10.1016/j.annepidem.2015.08.005
View details for PubMedID 26475983
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Effect of time of birth on maternal morbidity during childbirth hospitalization in California.
American journal of obstetrics and gynecology
2015; 213 (5): 705 e1-705 e11
Abstract
This observational study aimed to determine the relationship between time of birth and maternal morbidity during childbirth hospitalization.Composite maternal morbidities were determined using International Classification of Diseases, Ninth Revision, Clinical Modification and vital records codes, using linked hospital discharge and vital records data for 1,475,593 singleton births in California from 2005 through 2007. Time of birth, day of week, and sociodemographic, obstetric, and hospital volume risk factors were estimated using mixed effects logistic regression models.The odds for pelvic morbidity were lowest between 11 PM-7 AM compared to other time periods and the reference value of 7-11 AM. The odds for pelvic morbidity peaked between 11 AM-7 PM (adjusted odds ratio [AOR], 1101-1500 = 1.07; 95% confidence interval [CI], 1.06-1.09; 1501-1900 = 1.08; 95% CI, 1.06-1.10). Odds for severe morbidity were higher between 11 PM-7 AM (AOR, 2301-0300 = 1.31; 95% CI, 1.21-1.41; 0301-0700 = 1.30; 95% CI, 1.20-1.41) compared to other time periods. The adjusted odds were not statistically significant for weekend birth on pelvic morbidity (AOR, Saturday = 1.00; 95% CI, 0.98-1.02]; Sunday = 1.01; 95% CI, 0.99-1.03) or severe morbidity (AOR, Saturday = 1.09; 95% CI, 1.00-1.18; Sunday = 1.03; 95% CI, 0.94-1.13). Cesarean birth, hypertensive disorders, birthweight, and sociodemographic factors that include age, race, ethnicity, and insurance status were also significantly associated with severe morbidity.Even after controlling for sociodemographic factors and known risks such as cesarean birth and pregnancy complications such as hypertensive disorders, birth between 11 PM-7 AM is a significant independent risk factor for severe maternal morbidity.
View details for DOI 10.1016/j.ajog.2015.07.018
View details for PubMedID 26196454
View details for PubMedCentralID PMC4631702
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Effects of race/ethnicity and BMI on the association between height and risk for spontaneous preterm birth
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
2015; 213 (5)
View details for DOI 10.1016/j.ajog.2015.07.005
View details for Web of Science ID 000365763400027
View details for PubMedID 26187451
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Prepregnancy Obesity and Risks of Stillbirth
PLOS ONE
2015; 10 (10)
Abstract
We examined the association of maternal obesity with risk of stillbirth, focusing on whether the pattern of results varied by gestational age or maternal race-ethnicity or parity.Analyses included 4,012 stillbirths and 1,121,234 liveborn infants delivered in California from 2007-2010. We excluded stillbirths due to congenital anomalies, women with hypertensive disorders or diabetes, and plural births, to focus on fetuses and women without these known contributing conditions. We used Poisson regression to estimate relative risks (RR) and 95% confidence intervals (CI). Separate models were run for stillbirths delivered at 20-23, 24-27, 28-31, 32-36, 37-41 weeks, relative to liveborn deliveries at 37-41 weeks.For stillbirth at 20-23 weeks, RRs were elevated for all race-ethnicity and parity groups. The RR for a 20-unit change in BMI (which reflects the approximate BMI difference between a normal weight and an Obese III woman) was 3.5 (95% CI 2.2, 5.6) for nulliparous white women and ranged from 1.8 to 5.0 for other sub-groups. At 24-27 weeks, the association was significant (p<0.05) only for multiparous non-Hispanic whites; at 28-31 weeks, for multiparous whites and nulliparous whites and blacks; at 32-36 weeks, for multiparous whites and nulliparous blacks; and at 37-41 weeks, for all groups except nulliparous blacks. The pattern of results was similar when restricted to stillbirths due to unknown causes and somewhat stronger when restricted to stillbirths attributable to obstetric causes.Increased risks were observed across all gestational ages, and some evidence of heterogeneity of the associations was observed by race-ethnicity and parity.
View details for DOI 10.1371/journal.pone.0138549
View details for PubMedID 26466315
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Maternal characteristics and mid-pregnancy serum biomarkers as risk factors for subtypes of preterm birth.
BJOG : an international journal of obstetrics and gynaecology
2015; 122 (11): 1484-1493
Abstract
To examine the relationship between maternal characteristics, serum biomarkers and preterm birth (PTB) by spontaneous and medically indicated subtypes.Population-based cohort.California, United States of America.From a total population of 1 004 039 live singleton births in 2009 and 2010, 841 665 pregnancies with linked birth certificate and hospital discharge records were included.Characteristics were compared for term and preterm deliveries by PTB subtype using logistic regression and odds ratios adjusted for maternal characteristics and obstetric factors present in final stepwise models and 95% confidence intervals. First-trimester and second-trimester serum marker levels were analysed in a subset of 125 202 pregnancies with available first-trimester and second-trimester serum biomarker results.PTB by subtype.In fully adjusted models, ten characteristics and three serum biomarkers were associated with increased risk in each PTB subtype (Black race/ethnicity, pre-existing hypertension with and without pre-eclampsia, gestational hypertension with pre-eclampsia, pre-existing diabetes, anaemia, previous PTB, one or two or more previous caesarean section(s), interpregnancy interval ≥ 60 months, low first-trimester pregnancy-associated plasma protein A, high second-trimester α-fetoprotein, and high second-trimester dimeric inhibin A). These risks occurred in 51.6-86.2% of all pregnancies ending in PTB depending on subtype. The highest risk observed was for medically indicated PTB <32 weeks in women with pre-existing hypertension and pre-eclampsia (adjusted odds ratio 89.7, 95% CI 27.3-111.2).Our findings suggest a shared aetiology across PTB subtypes. These commonalities point to targets for further study and exploration of risk reduction strategies.Findings suggest a shared aetiology across preterm birth subtypes. Patterns may inform risk reduction efforts.
View details for DOI 10.1111/1471-0528.13495
View details for PubMedID 26111589
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Maternal Asthma, Preterm Birth, and Risk of Bronchopulmonary Dysplasia.
journal of pediatrics
2015; 167 (4): 875-880 e1
Abstract
To study the relationship between maternal asthma and the development of bronchopulmonary dysplasia (BPD).Using a large population-based California cohort, we investigated associations between maternal asthma and preterm birth subtype, as well as maternal asthma and BPD. We used data from 2007-2010 maternal delivery discharge records of 2 009 511 pregnancies and International Classification of Diseases, Ninth Revision codes. Preterm birth was defined as <37 weeks gestational age (GA), with subgroups of <28 weeks, 28-32 weeks, and 33-37 weeks GA, as well as preterm subtype, defined as spontaneous, medically indicated, or unknown. Linkage between the 2 California-wide datasets yielded 21 944 singleton preterm infants linked to their mother's records, allowing estimation of the risk of BPD in mothers with asthma and those without asthma.Maternal asthma was associated with increased odds (OR, 1.42; 95% CI, 1.38-1.46) of preterm birth at <37 weeks GA, with the greatest risk for 28-32 GA (aOR, 1.60; 95% CI, 1.47-1.74). Among 21 944 preterm infants, we did not observe an elevated risk for BPD in infants born to mothers with asthma (aOR, 1.03; 95% CI, 0.9-1.2). Stratification by maternal treatment with antenatal steroids revealed increased odds of BPD in infants whose mothers had asthma but did not receive antenatal steroids (aOR, 1.54; 95% CI, 1.15-2.06), but not in infants whose mothers had asthma and were treated with antenatal steroids (aOR, 0.85; 95% CI, 0.67-1.07).Asthma in mothers who did not receive antenatal steroid treatment is associated with an increased risk of BPD in their preterm infants.
View details for DOI 10.1016/j.jpeds.2015.06.048
View details for PubMedID 26254835
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Maternal Asthma, Preterm Birth, and Risk of Bronchopulmonary Dysplasia.
journal of pediatrics
2015; 167 (4): 875-880 e1
Abstract
To study the relationship between maternal asthma and the development of bronchopulmonary dysplasia (BPD).Using a large population-based California cohort, we investigated associations between maternal asthma and preterm birth subtype, as well as maternal asthma and BPD. We used data from 2007-2010 maternal delivery discharge records of 2 009 511 pregnancies and International Classification of Diseases, Ninth Revision codes. Preterm birth was defined as <37 weeks gestational age (GA), with subgroups of <28 weeks, 28-32 weeks, and 33-37 weeks GA, as well as preterm subtype, defined as spontaneous, medically indicated, or unknown. Linkage between the 2 California-wide datasets yielded 21 944 singleton preterm infants linked to their mother's records, allowing estimation of the risk of BPD in mothers with asthma and those without asthma.Maternal asthma was associated with increased odds (OR, 1.42; 95% CI, 1.38-1.46) of preterm birth at <37 weeks GA, with the greatest risk for 28-32 GA (aOR, 1.60; 95% CI, 1.47-1.74). Among 21 944 preterm infants, we did not observe an elevated risk for BPD in infants born to mothers with asthma (aOR, 1.03; 95% CI, 0.9-1.2). Stratification by maternal treatment with antenatal steroids revealed increased odds of BPD in infants whose mothers had asthma but did not receive antenatal steroids (aOR, 1.54; 95% CI, 1.15-2.06), but not in infants whose mothers had asthma and were treated with antenatal steroids (aOR, 0.85; 95% CI, 0.67-1.07).Asthma in mothers who did not receive antenatal steroid treatment is associated with an increased risk of BPD in their preterm infants.
View details for DOI 10.1016/j.jpeds.2015.06.048
View details for PubMedID 26254835
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Heightened risk of preterm birth and growth restriction after a first-born son
ANNALS OF EPIDEMIOLOGY
2015; 25 (10): 743-747
Abstract
In Scandinavia, delivery of a first-born son elevates the risk of preterm delivery and intrauterine growth restriction of the next-born infant. External validity of these results remains unclear. We test this hypothesis for preterm delivery and growth restriction using the linked California birth cohort file. We examined the hypothesis separately by race and/or ethnicity.We retrieved data on 2,852,976 births to 1,426,488 mothers with at least two live births. Our within-mother tests applied Cox proportional hazards (preterm delivery, defined as less than 37 weeks gestation) and linear regression models (birth weight for gestational age percentiles).For non-Hispanic whites, Hispanics, Asians, and American Indian and/or Alaska Natives, analyses indicate heightened risk of preterm delivery and growth restriction after a first-born male. The race-specific hazard ratios for preterm delivery range from 1.07 to 1.18. Regression coefficients for birth weight for gestational age percentile range from -0.73 to -1.49. The 95% confidence intervals for all these estimates do not contain the null. By contrast, we could not reject the null for non-Hispanic black mothers.Whereas California findings generally support those from Scandinavia, the null results among non-Hispanic black mothers suggest that we do not detect adverse outcomes after a first-born male in all racial and/or ethnic groups.
View details for DOI 10.1016/j.annepidem.2015.07.002
View details for PubMedID 26265442
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Exome Sequencing of Neonatal Blood Spots and the Identification of Genes Implicated in Bronchopulmonary Dysplasia.
American journal of respiratory and critical care medicine
2015; 192 (5): 589-596
Abstract
Bronchopulmonary dysplasia (BPD), a prevalent severe lung disease of premature infants, has a strong genetic component. Large-scale genome-wide association studies for common variants have not revealed its genetic basis.Given the historical high mortality rate of extremely preterm infants who now survive and develop BPD, we hypothesized that risk loci underlying this disease are under severe purifying selection during evolution; thus, rare variants likely explain greater risk of the disease.We performed exome sequencing on 50 BPD-affected and unaffected twin pairs using DNA isolated from neonatal blood spots and identified genes affected by extremely rare nonsynonymous mutations. Functional genomic approaches were then used to systematically compare these affected genes.We identified 258 genes with rare nonsynonymous mutations in patients with BPD. These genes were highly enriched for processes involved in pulmonary structure and function including collagen fibril organization, morphogenesis of embryonic epithelium, and regulation of Wnt signaling pathway; displayed significantly elevated expression in fetal and adult lungs; and were substantially up-regulated in a murine model of BPD. Analyses of mouse mutants revealed their phenotypic enrichment for embryonic development and the cyanosis phenotype, a clinical manifestation of BPD.Our study supports the role of rare variants in BPD, in contrast with the role of common variants targeted by genome-wide association studies. Overall, our study is the first to sequence BPD exomes from newborn blood spot samples and identify with high confidence genes implicated in BPD, thereby providing important insights into its biology and molecular etiology.
View details for DOI 10.1164/rccm.201501-0168OC
View details for PubMedID 26030808
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Determinants of chronic lung disease severity in the first year of life; A population based study.
Pediatric pulmonology
2015; 50 (9): 878-888
Abstract
First, create a clinical severity score for patients with chronic lung disease of infancy (CLDi) following neonatal intensive care unit (NICU) stay. Second, using California wide population-based data, identify factors associated with clinical severity of CLDi at 4-9 months corrected gestational age (CGA).Pediatric pulmonologists ranked and weighted eight factors reflecting clinical severity of CLDi. Utilizing these data we scored and assigned these to 4-9 month old CGA moderate/severe bronchopulmonary dysplasia (BPD) infants, born<30 weeks gestational age (GA), within the California High Risk Infant Follow up (HRIF) program. Infants were studied relative to factors from the California Perinatal Quality Care Collaborative (CPQCC).We received survey responses from 43/88 pediatric pulmonologists from 28/53 North American training centers who are experts in CLDi. Strong agreement between ranking (72-100%) of respiratory system parameters and weighting (out of 100 points weighting was within 20 points) was observed with severity of CLDi. Data from 940 CLDi premature infants <30 weeks GA were obtained. Infants with severe CLDi scores at 4-9 months CGA (relative to a zero score) showed positive associations with being male, odds ratio[OR] = 2.45[confidence interval (CI) 1.26-4.77]), >30 ventilator days, OR = 3.82 (1.30-11.2), postnatal steroids OR = 3.94 (1.94-7.84), and a surprising inverse association with retinopathy of prematurity stage 3-4, OR = 0.24 (0.09-0.67) CONCLUSIONS: The CLDi clinical severity score allowed for standardized assessment of pulmonary morbidity, and evaluation of risk factors in the NICU for CLDi following NICU discharge. These observations point to risk factors associated with CLDi outcomes at 4-9 months CGA. Pediatr Pulmonol. 2015; 50:878-888. © 2015 Wiley Periodicals, Inc.
View details for DOI 10.1002/ppul.23148
View details for PubMedID 25651820
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Determinants of chronic lung disease severity in the first year of life; A population based study
PEDIATRIC PULMONOLOGY
2015; 50 (9): 878-888
Abstract
First, create a clinical severity score for patients with chronic lung disease of infancy (CLDi) following neonatal intensive care unit (NICU) stay. Second, using California wide population-based data, identify factors associated with clinical severity of CLDi at 4-9 months corrected gestational age (CGA).Pediatric pulmonologists ranked and weighted eight factors reflecting clinical severity of CLDi. Utilizing these data we scored and assigned these to 4-9 month old CGA moderate/severe bronchopulmonary dysplasia (BPD) infants, born<30 weeks gestational age (GA), within the California High Risk Infant Follow up (HRIF) program. Infants were studied relative to factors from the California Perinatal Quality Care Collaborative (CPQCC).We received survey responses from 43/88 pediatric pulmonologists from 28/53 North American training centers who are experts in CLDi. Strong agreement between ranking (72-100%) of respiratory system parameters and weighting (out of 100 points weighting was within 20 points) was observed with severity of CLDi. Data from 940 CLDi premature infants <30 weeks GA were obtained. Infants with severe CLDi scores at 4-9 months CGA (relative to a zero score) showed positive associations with being male, odds ratio[OR] = 2.45[confidence interval (CI) 1.26-4.77]), >30 ventilator days, OR = 3.82 (1.30-11.2), postnatal steroids OR = 3.94 (1.94-7.84), and a surprising inverse association with retinopathy of prematurity stage 3-4, OR = 0.24 (0.09-0.67) CONCLUSIONS: The CLDi clinical severity score allowed for standardized assessment of pulmonary morbidity, and evaluation of risk factors in the NICU for CLDi following NICU discharge. These observations point to risk factors associated with CLDi outcomes at 4-9 months CGA. Pediatr Pulmonol. 2015; 50:878-888. © 2015 Wiley Periodicals, Inc.
View details for DOI 10.1002/ppul.23148
View details for Web of Science ID 000360091000007
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Spatial and temporal patterns in preterm birth in the United States
PEDIATRIC RESEARCH
2015; 77 (6): 836-844
Abstract
Despite years of research, the etiologies of preterm birth remain unclear. In order to help generate new research hypotheses, this study explored spatial and temporal patterns of preterm birth in a large, total-population dataset.Data on 145 million US births in 3,000 counties from the Natality Files of the National Center for Health Statistics for 1971-2011 were examined. State trends in early (<34 wk) and late (34-36 wk) preterm birth rates were compared. K-means cluster analyses were conducted to identify gestational age distribution patterns for all US counties over time.A weak association was observed between state trends in <34 wk birth rates and the initial absolute <34 wk birth rate. Significant associations were observed between trends in <34 wk and 34-36 wk birth rates and between white and African American <34 wk births. Periodicity was observed in county-level trends in <34 wk birth rates. Cluster analyses identified periods of significant heterogeneity and homogeneity in gestational age distributional trends for US counties.The observed geographic and temporal patterns suggest periodicity and complex, shared influences among preterm birth rates in the United States. These patterns could provide insight into promising hypotheses for further research.
View details for DOI 10.1038/pr.2015.55
View details for PubMedID 25760546
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Neonatal Intensive Care Unit Antibiotic Use
PEDIATRICS
2015; 135 (5): 826-833
Abstract
Treatment of suspected infection is a mainstay of the daily work in the NICU. We hypothesized that NICU antibiotic prescribing practice variation correlates with rates of proven infection, necrotizing enterocolitis (NEC), mortality, inborn admission, and with NICU surgical volume and average length of stay.In a retrospective cohort study of 52 061 infants in 127 NICUs across California during 2013, we compared sample means and explored linear and nonparametric correlations, stratified by NICU level of care and lowest/highest antibiotic use rate quartiles.Overall antibiotic use varied 40-fold, from 2.4% to 97.1% of patient-days; median = 24.5%. At all levels of care, it was independent of proven infection, NEC, surgical volume, or mortality. Fifty percent of intermediate level NICUs were in the highest antibiotic use quartile, yet most of these units reported infection rates of zero. Regional NICUs in the highest antibiotic quartile reported inborn admission rate 218% higher (0.24 vs 0.11, P = .03), and length of stay 35% longer (90.2 days vs 66.9 days, P = .03) than regional NICUs in the lowest quartile.Forty-fold variation in NICU antibiotic prescribing practice across 127 NICUs with similar burdens of proven infection, NEC, surgical volume, and mortality indicates that a considerable portion of antibiotic use lacks clear warrant; in some NICUs, antibiotics are overused. Additional study is needed to establish appropriate use ranges and elucidate the determinants and directionality of relationships between antibiotic and other resource use.
View details for DOI 10.1542/peds.2014-3409
View details for PubMedID 25896845
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A randomized clinical trial of therapeutic hypothermia mode during transport for neonatal encephalopathy.
journal of pediatrics
2015; 166 (4): 856-61 e1 2
Abstract
To determine if temperature regulation is improved during neonatal transport using a servo-regulated cooling device when compared with standard practice.We performed a multicenter, randomized, nonmasked clinical trial in newborns with neonatal encephalopathy cooled during transport to 9 neonatal intensive care units in California. Newborns who met institutional criteria for therapeutic hypothermia were randomly assigned to receive cooling according to usual center practices vs device servo-regulated cooling. The primary outcome was the percentage of temperatures in target range (33°-34°C) during transport. Secondary outcomes included percentage of newborns reaching target temperature any time during transport, time to target temperature, and percentage of newborns in target range 1 hour after cooling initiation.One hundred newborns were enrolled: 49 to control arm and 51 to device arm. Baseline demographics did not differ with the exception of cord pH. For each subject, the percentage of temperatures in the target range was calculated. Infants cooled using the device had a higher percentage of temperatures in target range compared with control infants (median 73% [IQR 17-88] vs 0% [IQR 0-52], P < .001). More subjects reached target temperature during transport using the servo-regulated device (80% vs 49%, P <.001), and in a shorter time period (44 ± 31 minutes vs 63 ± 37 minutes, P = .04). Device-cooled infants reached target temperature by 1 hour with greater frequency than control infants (71% vs 20%, P < .001).Cooling using a servo-regulated device provides more predictable temperature management during neonatal transport than does usual care for outborn newborns with neonatal encephalopathy.
View details for DOI 10.1016/j.jpeds.2014.12.061
View details for PubMedID 25684087
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A Randomized Clinical Trial of Therapeutic Hypothermia Mode during Transport for Neonatal Encephalopathy.
journal of pediatrics
2015; 166 (4): 856-861 e2
View details for DOI 10.1016/j.jpeds.2014.12.061
View details for PubMedID 25684087
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Factors Associated With Recurrent Preterm Birth Among Underweight Women
SAGE PUBLICATIONS INC. 2015: 150A
View details for Web of Science ID 000351407201160
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Hospital variation and risk factors for bronchopulmonary dysplasia in a population-based cohort.
JAMA pediatrics
2015; 169 (2)
View details for DOI 10.1001/jamapediatrics.2014.3676
View details for PubMedID 25642906
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Hospital variation and risk factors for bronchopulmonary dysplasia in a population-based cohort.
JAMA pediatrics
2015; 169 (2)
Abstract
Bronchopulmonary dysplasia (BPD) remains a serious morbidity in very low-birth-weight (VLBW) infants (<1500 g). Deregionalization of neonatal care has resulted in an increasing number of VLBW infants treated in community hospitals with unknown impact on the development of BPD.To identify individual risk factors for BPD development and hospital variation of BPD rates across all levels of neonatal intensive care units (NICUs) within the California Perinatal Quality Care Collaborative.Retrospective cohort study (January 2007 to December 2011) from the California Perinatal Quality Care Collaborative including more than 90% of California's NICUs. Eligible VLBW infants born between 22 to 29 weeks' gestational age.Varying levels of intensive care.Bronchopulmonary dysplasia was defined as continuous supplemental oxygen use at 36 weeks' postmenstrual age. A combined outcome of BPD or mortality prior to 36 weeks was used. Multivariable logistic regression accounting for hospital as a random effect and gestational age as a risk factor was used to assess individual risk factors for BPD. This model was applied to determine risk-adjusted rates of BPD across hospitals and assess associations between levels of care and BPD rates.The study cohort included 15 779 infants, of which 1534 infants died prior to 36 weeks' postmenstrual age. A total of 7081 infants, or 44.8%, met the primary outcome of BPD or death prior to 36 weeks. Combined BPD or death rates across 116 NICUs varied from 17.7% to 73.4% (interquartile range, 38.7%-54.1%). Compared with level IV NICUs, the risk for developing BPD was higher for level II NICUs (odds ratio, 1.23; 95% CI, 1.02-1.49) and similar for level III NICUs (odds ratio, 1.04; 95% CI, 0.95-1.14).Bronchopulmonary dysplasia or death prior to 36 weeks' postmenstrual age affects approximately 45% of VLBW infants across California. The wide variability in BPD occurrence across hospitals could offer insights into potential risk or preventive factors. Additionally, our findings suggest that increased regionalization of NICU care may reduce BPD among VLBW infants.
View details for DOI 10.1001/jamapediatrics.2014.3676
View details for PubMedID 25642906
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Referral of Very Low Birth Weight Infants to High-Risk Follow-Up at Neonatal Intensive Care Unit Discharge Varies Widely across California.
journal of pediatrics
2015; 166 (2): 289-295
Abstract
To determine rates and factors associated with referral to the California Children's Services high-risk infant follow-up (HRIF) program among very low birth weight (BW) infants in the California Perinatal Quality of Care Collaborative.Using multivariable logistic regression, we examined independent associations of demographic and clinical variables, neonatal intensive care unit (NICU) volume and level, and California region with HRIF referral.In 2010-2011, 8071 very low BW infants were discharged home; 6424 (80%) were referred to HRIF. Higher odds for HRIF referral were associated with lower BW (OR 1.9, 95% CI 1.5-2.4; ≤ 750 g vs 1251-1499 g), higher NICU volume (OR 1.6, 1.2-2.1; highest vs lowest quartile), and California Children's Services Regional level (OR 3.1, 2.3-4.3, vs intermediate); and lower odds with small for gestational age (OR 0.79, 0.68-0.92), and maternal race African American (OR 0.58, 0.47-0.71) and Hispanic (OR 0.65, 0.55-0.76) vs white. There was wide variability in referral among regions (8%-98%) and NICUs (<5%-100%), which remained after risk adjustment.There are considerable disparities in HRIF referral, some of which may indicate regional and individual NICU resource challenges and barriers. Understanding demographic and clinical factors associated with failure to refer present opportunities for targeted quality improvement initiatives.
View details for DOI 10.1016/j.jpeds.2014.10.038
View details for PubMedID 25454311
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BODY MASS INDEX CHANGE BETWEEN PREGNANCIES AND RISK OF SPONTANEOUS PRETERM BIRTH
LIPPINCOTT WILLIAMS & WILKINS. 2015: 177
View details for Web of Science ID 000346600700316
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Mode of delivery in women of extremely advanced maternal age
MOSBY-ELSEVIER. 2015: S201–S202
View details for DOI 10.1016/j.ajog.2014.10.431
View details for Web of Science ID 000361140900381
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DONOR HUMAN MILK AVAILABILITY PROMOTES BREAST MILK FEEDING AND LOWERS NECROTIZING ENTEROCOLITIS IN VERY LOW BIRTH WEIGHT INFANTS
LIPPINCOTT WILLIAMS & WILKINS. 2015: 176
View details for Web of Science ID 000346600700313
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Opportunities for maternal transport of pregnancies at risk for delivery of VLBW infants - results from the california maternal quality care collaborative
MOSBY-ELSEVIER. 2015: S237
View details for DOI 10.1016/j.ajog.2014.10.510
View details for Web of Science ID 000361140900460
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Prediction of early spontaneous preterm birth using placental, lipid, and immune related markers
MOSBY-ELSEVIER. 2015: S292
View details for DOI 10.1016/j.ajog.2014.10.792
View details for Web of Science ID 000361140900581
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Effect of deregionalized care on mortality in very low-birth-weight infants with necrotizing enterocolitis.
JAMA pediatrics
2015; 169 (1): 26-32
Abstract
There has been a significant expansion in the number of low-level and midlevel neonatal intensive care units (NICUs) in recent decades. Infants with necrotizing enterocolitis represent a high-risk subgroup of the very low-birth-weight (VLBW) (<1500 g) population that would benefit from focused regionalization.To describe the current trend toward deregionalization and to test the hypothesis that infants with necrotizing enterocolitis represent a particularly high-risk subgroup of the VLBW population that would benefit from early identification, increased intensity of early management, and possible targeted triage to tertiary hospitals.A retrospective cohort study was conducted of NICUs in California. We used data collected by the California Perinatal Quality Care Collaborative from 2005 to 2011 to assess mortality rates among a population-based sample of 30 566 VLBW infants, 1879 with necrotizing enterocolitis, according to the level of care and VLBW case volume at the hospital of birth.Level and volume of neonatal intensive care at the hospital of birth.In-hospital mortality.There was a persistent trend toward deregionalization during the study period and mortality rates varied according to the level of care. High-level, high-volume (level IIIB with >100 VLBW cases per year and level IIIC) hospitals achieved the lowest risk-adjusted mortality. Infants with necrotizing enterocolitis born into midlevel hospitals (low-volume level IIIB and level IIIA NICUs) had odds of death ranging from 1.42 (95% CI, 1.08-1.87) to 1.51 (95% CI, 1.05-2.15, respectively). In the final year of the study, just 28.6% of the infants with necrotizing enterocolitis were born into high-level, high-volume hospitals. For infants born into lower level centers, transfer to a higher level of care frequently occurred well into the third week of life.These findings represent an immediate opportunity for local quality improvement initiatives and potential impetus for the regionalization of important NICU resources.
View details for DOI 10.1001/jamapediatrics.2014.2085
View details for PubMedID 25383940
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Maternal height and risk for spontaneous preterm birth across BMI categories
MOSBY-ELSEVIER. 2015: S83
View details for DOI 10.1016/j.ajog.2014.10.178
View details for Web of Science ID 000361140900134
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Exposure to Leadership WalkRounds in neonatal intensive care units is associated with a better patient safety culture and less caregiver burnout
BMJ QUALITY & SAFETY
2014; 23 (10): 814-822
Abstract
Leadership WalkRounds (WR) are widely used in healthcare organisations to improve patient safety. The relationship between WR and caregiver assessments of patient safety culture, and healthcare worker burnout is unknown.This cross-sectional survey study evaluated the association between receiving feedback about actions taken as a result of WR and healthcare worker assessments of patient safety culture and burnout across 44 neonatal intensive care units (NICUs) actively participating in a structured delivery room management quality improvement initiative.Of 3294 administered surveys, 2073 were returned for an overall response rate of 62.9%. More WR feedback was associated with better safety culture results and lower burnout rates in the NICUs. Participation in WR and receiving feedback about WR were less common in NICUs than in a benchmarking comparison of adult clinical areas.WR are linked to patient safety and burnout. In NICUs, where they occurred more often, the workplace appears to be a better place to deliver and to receive care.
View details for DOI 10.1136/bmjqs-2013-002042
View details for Web of Science ID 000342375400004
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Copy Number Variation in Bronchopulmonary Dysplasia
AMERICAN JOURNAL OF MEDICAL GENETICS PART A
2014; 164 (10): 2672–75
View details for DOI 10.1002/ajmg.a.36659
View details for Web of Science ID 000342279600041
View details for PubMedID 24975634
View details for PubMedCentralID PMC4167221
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Exposure to Leadership WalkRounds in neonatal intensive care units is associated with a better patient safety culture and less caregiver burnout.
BMJ quality & safety
2014; 23 (10): 814-822
Abstract
Leadership WalkRounds (WR) are widely used in healthcare organisations to improve patient safety. The relationship between WR and caregiver assessments of patient safety culture, and healthcare worker burnout is unknown.This cross-sectional survey study evaluated the association between receiving feedback about actions taken as a result of WR and healthcare worker assessments of patient safety culture and burnout across 44 neonatal intensive care units (NICUs) actively participating in a structured delivery room management quality improvement initiative.Of 3294 administered surveys, 2073 were returned for an overall response rate of 62.9%. More WR feedback was associated with better safety culture results and lower burnout rates in the NICUs. Participation in WR and receiving feedback about WR were less common in NICUs than in a benchmarking comparison of adult clinical areas.WR are linked to patient safety and burnout. In NICUs, where they occurred more often, the workplace appears to be a better place to deliver and to receive care.
View details for DOI 10.1136/bmjqs-2013-002042
View details for PubMedID 24825895
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Combined elevated midpregnancy tumor necrosis factor alpha and hyperlipidemia in pregnancies resulting in early preterm birth.
American journal of obstetrics and gynecology
2014; 211 (2): 141 e1-9
Abstract
The objective of the study was to determine whether pregnancies resulting in early preterm birth (PTB) (<30 weeks) were more likely than term pregnancies to have elevated midtrimester serum tumor necrosis factor alpha (TNF-α) levels combined with lipid patterns suggestive of hyperlipidemia.In 2 nested case-control samples drawn from California and Iowa cohorts, we examined the frequency of elevated midpregnancy serum TNF-α levels (in the fourth quartile [4Q]) and lipid patterns suggestive of hyperlipidemia (eg, total cholesterol, low-density-lipoproteins, or triglycerides in the 4Q, high-density lipoproteins in the first quartile) (considered independently and by co-occurrence) in pregnancies resulting in early PTB compared with those resulting in term birth (n = 108 in California and n = 734 in Iowa). Odds ratios (ORs) and 95% confidence intervals (CIs) estimated in logistic regression models were used for comparisons.Early preterm pregnancies were 2-4 times more likely than term pregnancies to have a TNF-α level in the 4Q co-occurring with indicators of hyperlipidemia (37.5% vs 13.9% in the California sample (adjusted OR, 4.0; 95% CI, 1.1-16.3) and 26.3% vs 14.9% in the Iowa sample (adjusted OR, 2.7; 95% CI, 1.1-6.3). No differences between early preterm and term pregnancies were observed when TNF-α or target lipid abnormalities occurred in isolation. Observed differences were not explicable to any maternal or infant characteristics.Pregnancies resulting in early PTB were more likely than term pregnancies to have elevated midpregnancy TNF-α levels in combination with lipid patterns suggestive of hyperlipidemia.
View details for DOI 10.1016/j.ajog.2014.02.019
View details for PubMedID 24831886
View details for PubMedCentralID PMC4117727
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Combined elevated midpregnancy tumor necrosis factor alpha and hyperlipidemia in pregnancies resulting in early preterm birth.
American journal of obstetrics and gynecology
2014; 211 (2): 141 e1-9
View details for DOI 10.1016/j.ajog.2014.02.019
View details for PubMedID 24831886
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Maternal prepregnancy body mass index and risk of spontaneous preterm birth.
Paediatric and perinatal epidemiology
2014; 28 (4): 302-311
Abstract
Findings from studies examining risk of preterm birth associated with elevated prepregnancy body mass index (BMI) have been inconsistent.Within a large population-based cohort, we explored associations between prepregnancy BMI and spontaneous preterm birth across a spectrum of BMI, gestational age, and racial/ethnic categories. We analysed data for 989 687 singleton births in California, 2007-09. Preterm birth was grouped as 20-23, 24-27, 28-31, or 32-36 weeks gestation (compared with 37-41 weeks). BMI was categorised as <18.5 (underweight); 18.5-24.9 (normal); 25.0-29.9 (overweight); 30.0-34.9 (obese I); 35.0-39.9 (obese II); and ≥40.0 (obese III). We assessed associations between BMI and spontaneous preterm birth of varying severity among non-Hispanic White, Hispanic, and non-Hispanic Black women.Analyses of mothers without hypertension and diabetes, adjusted for age, education, height, and prenatal care initiation, showed obesity categories I-III to be associated with increased risk of spontaneous preterm birth at 20-23 and 24-27 weeks among those of parity 1 in each race/ethnic group. Relative risks for obese III and preterm birth at 20-23 weeks were 6.29 [95% confidence interval (CI) 3.06, 12.9], 4.34 [95% CI 2.30, 8.16], and 4.45 [95% CI 2.53, 7.82] for non-Hispanic Whites, non-Hispanic Blacks, and Hispanics, respectively. A similar, but lower risk, pattern was observed for women of parity ≥2 and preterm birth at 20-23 weeks. Underweight was associated with modest risks for preterm birth at ≥24 weeks among women in each racial/ethnic group regardless of parity.The association between women's prepregnancy BMI and risk of spontaneous preterm birth is complex and is influenced by race/ethnicity, gestational age, and parity.
View details for DOI 10.1111/ppe.12125
View details for PubMedID 24810721
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Baby-MONITOR: A Composite Indicator of NICU Quality.
Pediatrics
2014; 134 (1): 74-82
Abstract
NICUs vary in the quality of care delivered to very low birth weight (VLBW) infants. NICU performance on 1 measure of quality only modestly predicts performance on others. Composite measurement of quality of care delivery may provide a more comprehensive assessment of quality. The objective of our study was to develop a robust composite indicator of quality of NICU care provided to VLBW infants that accurately discriminates performance among NICUs.We developed a composite indicator, Baby-MONITOR, based on 9 measures of quality chosen by a panel of experts. Measures were standardized, equally weighted, and averaged. We used the California Perinatal Quality Care Collaborative database to perform across-sectional analysis of care given to VLBW infants between 2004 and 2010. Performance on the Baby-MONITOR is not an absolute marker of quality but indicates overall performance relative to that of the other NICUs. We used sensitivity analyses to assess the robustness of the composite indicator, by varying assumptions and methods.Our sample included 9023 VLBW infants in 22 California regional NICUs. We found significant variations within and between NICUs on measured components of the Baby-MONITOR. Risk-adjusted composite scores discriminated performance among this sample of NICUs. Sensitivity analysis that included different approaches to normalization, weighting, and aggregation of individual measures showed the Baby-MONITOR to be robust (r = 0.89-0.99).The Baby-MONITOR may be a useful tool to comprehensively assess the quality of care delivered by NICUs.
View details for DOI 10.1542/peds.2013-3552
View details for PubMedID 24918221
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Investigation of maternal environmental exposures in association with self-reported preterm birth.
Reproductive toxicology
2014; 45: 1-7
Abstract
Identification of maternal environmental factors influencing preterm birth risks is important to understand the reasons for the increase in prematurity since 1990. Here, we utilized a health survey, the US National Health and Nutrition Examination Survey (NHANES) to search for personal environmental factors associated with preterm birth. 201 urine and blood markers of environmental factors, such as allergens, pollutants, and nutrients were assayed in mothers (range of N: 49-724) who answered questions about any children born preterm (delivery <37 weeks). We screened each of the 201 factors for association with any child born preterm adjusting by age, race/ethnicity, education, and household income. We attempted to verify the top finding, urinary bisphenol A, in an independent study of pregnant women attending Lucile Packard Children's Hospital. We conclude that the association between maternal urinary levels of bisphenol A and preterm birth should be evaluated in a larger epidemiological investigation.
View details for DOI 10.1016/j.reprotox.2013.12.005
View details for PubMedID 24373932
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Swedish and American studies show that initiatives to decrease maternal obesity could play a key role in reducing preterm birth.
Acta paediatrica (Oslo, Norway : 1992)
2014; 103 (6): 586-591
Abstract
Maternal obesity is a major source of preventable perinatal morbidity, but studies of the relationship between obesity and preterm birth have been inconsistent. This review looks at two major studies covering just under 3.5 million births, from California, USA, and Sweden.Inconsistent findings in previous studies appear to stem from the complex relationship between obesity and preterm birth. Initiatives to decrease maternal obesity represent an important strategy in reducing preterm birth.
View details for DOI 10.1111/apa.12616
View details for PubMedID 24575829
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Cytomegalovirus infection among infants in California neonatal intensive care units, 2005-2010
JOURNAL OF PERINATAL MEDICINE
2014; 42 (3): 393-399
Abstract
To assess the burden of congenital and perinatal cytomegalovirus (CMV) disease among infants hospitalized in neonatal intensive care units (NICUs).CMV infection was defined as a report of positive CMV viral culture or polymerase chain reaction at any time since birth in an infant hospitalized in a NICU reporting to California Perinatal Quality Care Collaborative during 2005-2010.One hundred and fifty-six (1.7 per 1000) infants were reported with CMV infection, representing an estimated 5% of the expected number of live births with symptomatic CMV disease. Prevalence was higher among infants with younger gestational ages and lower birth weights. Infants with CMV infection had significantly longer hospital stays and 14 (9%) died.Reported prevalence of CMV infection in NICUs represents a fraction of total expected disease burden from CMV in the newborn period, likely resulting from underdiagnosis and milder symptomatic cases that do not require NICU care. More complete ascertainment of infants with congenital CMV infection that would benefit from antiviral treatment may reduce the burden of CMV disease in this population.
View details for DOI 10.1515/jpm-2013-0183
View details for Web of Science ID 000338934600018
View details for PubMedID 24334425
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Maternal Body Mass and Risk for Premature Birth among 1.2 Million California Births
SAGE PUBLICATIONS INC. 2014: 340A
View details for Web of Science ID 000333813003131
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Maternal Characteristics and Mid-Pregnancy Serum Markers in Spontaneous and Medically Indicated Preterm Birth
SAGE PUBLICATIONS INC. 2014: 239A
View details for Web of Science ID 000333813002170
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Population-level correlates of preterm delivery among black and white women in the U.S.
PloS one
2014; 9 (4)
Abstract
This study examined the ability of social, demographic, environmental and health-related factors to explain geographic variability in preterm delivery among black and white women in the US and whether these factors explain black-white disparities in preterm delivery.We examined county-level prevalence of preterm delivery (20-31 or 32-36 weeks gestation) among singletons born 1998-2002. We conducted multivariable linear regression analysis to estimate the association of selected variables with preterm delivery separately for each preterm/race-ethnicity group.The prevalence of preterm delivery varied two- to three-fold across U.S. counties, and the distributions were strikingly distinct for blacks and whites. Among births to blacks, regression models explained 46% of the variability in county-level risk of delivery at 20-31 weeks and 55% for delivery at 32-36 weeks (based on R-squared values). Respective percentages for whites were 67% and 71%. Models included socio-environmental/demographic and health-related variables and explained similar amounts of variability overall.Much of the geographic variability in preterm delivery in the US can be explained by socioeconomic, demographic and health-related characteristics of the population, but less so for blacks than whites.
View details for DOI 10.1371/journal.pone.0094153
View details for PubMedID 24740117
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EXPOSURE TO LEADERSHIP WALKROUNDS IN NEONATAL INTENSIVE CARE UNITS IS ASSOCIATED WITH A BETTER PATIENT SAFETY CULTURE AND LESS CAREGIVER BURNOUT
LIPPINCOTT WILLIAMS & WILKINS. 2014: 264–65
View details for Web of Science ID 000336284900417
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A RANDOMIZED CLINICAL TRIAL OF THERAPEUTIC HYPOTHERMIA DURING TRANSPORT FOR HYPOXIC ISCHEMIC ENCEPHALOPATHY: DEVICE SERVO-REGULATED COOLING VERSUS STANDARD PRACTICE
LIPPINCOTT WILLIAMS & WILKINS. 2014: 210
View details for Web of Science ID 000336284900233
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Elevated mid-pregnancy tumor necrosis factor-alpha (TNF-alpha) and lipid patterns suggestive of hyperlipidemia in pregnancies resulting in early preterm birth
MOSBY-ELSEVIER. 2014: S375–S376
View details for DOI 10.1016/j.ajog.2013.10.798
View details for Web of Science ID 000330322600765
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Population-Level Correlates of Preterm Delivery among Black and White Women in the U.S.
PloS one
2014; 9 (4)
View details for DOI 10.1371/journal.pone.0094153
View details for PubMedID 24740117
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Estimating the quality of neonatal transport in California.
Journal of perinatology
2013; 33 (12): 964-970
Abstract
Objective:To develop a strategy to assess the quality of neonatal transport based on change in neonatal condition during transport.Study Design:The Canadian Transport Risk Index of Physiologic Stability (TRIPS) score was optimized for a California (Ca) population using data collected on 21 279 acute neonatal transports, 2007 to 2009, using models predicting (2/3) and validating (1/3) mortality within 7 days of transport. Quality Change Point 10th percentile (QCP10), a benchmark of the greatest deterioration seen in 10% of the transports by top-performing teams, was established.Result:Compared with perinatal variables (0.79), the Ca-TRIPS had a validation receiver operator characteristic area for prediction of death of 0.88 in all infants and 0.86 in infants transported after day 7. The risk of death increased 2.4-fold in infants whose deterioration exceeded the QCP10.Conclusion:We present a practical, benchmarked, risk-adjusted, estimate of the quality of neonatal transport.
View details for DOI 10.1038/jp.2013.57
View details for PubMedID 24071907
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Accounting for variation in length of NICU stay for extremely low birth weight infants.
Journal of perinatology
2013; 33 (11): 872-876
Abstract
Objective:To develop a length of stay (LOS) model for extremely low birth weight (ELBW) infants.Study Design:We included infants from the California Perinatal Quality Care Collaborative with birth weight 401 to 1000 g who were discharged to home. Exclusion criteria were congenital anomalies, surgery and death. LOS was defined as days from admission to discharge. As patients who died or were transferred to lower level of care were excluded, we assessed correlation of hospital mortality rates and transfers to risk-adjusted LOS.Results:There were 2012 infants with median LOS 79 days (range 23 to 219). Lower birth weight, lack of antenatal steroids and lower Apgar score were associated with longer LOS. There was negligible correlation between risk-adjusted LOS and hospital mortality rates (r=0.0207) and transfer-out rates (r=0.121).Conclusion:Particularly because ELBW infants have extended hospital stays, identification of unbiased and informative risk-adjusted LOS for these infants is an important step in benchmarking best practice and improving efficiency in care.
View details for DOI 10.1038/jp.2013.92
View details for PubMedID 23949836
View details for PubMedCentralID PMC3815522
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A Genome-Wide Association Study (GWAS) for Bronchopulmonary Dysplasia.
Pediatrics
2013; 132 (2): 290-297
Abstract
Twin studies suggest that heritability of moderate-severe bronchopulmonary dysplasia (BPD) is 53% to 79%, we conducted a genome-wide association study (GWAS) to identify genetic variants associated with the risk for BPD.The discovery GWAS was completed on 1726 very low birth weight infants (gestational age = 25(0)-29(6/7) weeks) who had a minimum of 3 days of intermittent positive pressure ventilation and were in the hospital at 36 weeks' postmenstrual age. At 36 weeks' postmenstrual age, moderate-severe BPD cases (n = 899) were defined as requiring continuous supplemental oxygen, whereas controls (n = 827) inhaled room air. An additional 795 comparable infants (371 cases, 424 controls) were a replication population. Genomic DNA from case and control newborn screening bloodspots was used for the GWAS. The replication study interrogated single-nucleotide polymorphisms (SNPs) identified in the discovery GWAS and those within the HumanExome beadchip.Genotyping using genomic DNA was successful. We did not identify SNPs associated with BPD at the genome-wide significance level (5 × 10(-8)) and no SNP identified in previous studies reached statistical significance (Bonferroni-corrected P value threshold .0018). Pathway analyses were not informative.We did not identify genomic loci or pathways that account for the previously described heritability for BPD. Potential explanations include causal mutations that are genetic variants and were not assayed or are mapped to many distributed loci, inadequate sample size, race ethnicity of our study population, or case-control differences investigated are not attributable to underlying common genetic variation.
View details for DOI 10.1542/peds.2013-0533
View details for PubMedID 23897914
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The Continuum of Maternal Sepsis Severity: Incidence and Risk Factors in a Population-Based Cohort Study
PLOS ONE
2013; 8 (7)
Abstract
To investigate the incidence and risk factors associated with uncomplicated maternal sepsis and progression to severe sepsis in a large population-based birth cohort.This retrospective cohort study used linked hospital discharge and vital statistics records data for 1,622,474 live births in California during 2005-2007. Demographic and clinical factors were adjusted using multivariable logistic regression with robust standard errors.1598 mothers developed sepsis; incidence of all sepsis was 10 per 10,000 live births (95% CI = 9.4-10.3). Women had significantly increased adjusted odds (aOR) of developing sepsis if they were older (25-34 years: aOR = 1.29; ≥35 years: aOR = 1.41), had ≤high-school education (aOR = 1.63), public/no-insurance (aOR = 1.22) or a cesarean section (primary: aOR = 1.99; repeat: aOR = 1.25). 791 women progressed to severe sepsis; incidence of severe sepsis was 4.9 per 10,000 live births (95% CI = 4.5-5.2). Women had significantly increased adjusted odds of progressing to severe sepsis if they were Black (aOR = 2.09), Asian (aOR = 1.59), Hispanic (aOR = 1.42), had public/no-insurance (aOR = 1.52), delivered in hospitals with <1,000 births/year (aOR = 1.93), were primiparous (aOR = 2.03), had a multiple birth (aOR = 3.5), diabetes (aOR = 1.47), or chronic hypertension (aOR = 8.51). Preeclampsia and postpartum hemorrhage were also significantly associated with progression to severe sepsis (aOR = 3.72; aOR = 4.18). For every cumulative factor, risk of uncomplicated sepsis increased by 25% (95% CI = 17.4-32.3) and risk of progression to severe sepsis/septic shock increased by 57% (95% CI = 40.8-74.4).The rate of severe sepsis was approximately twice the 1991-2003 national estimate. Risk factors identified are relevant to obstetric practice given their cumulative risk effect and the apparent increase in severe sepsis incidence.
View details for DOI 10.1371/journal.pone.0067175
View details for Web of Science ID 000321341000034
View details for PubMedID 23843991
View details for PubMedCentralID PMC3699572
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Association of early-preterm birth with abnormal levels of routinely collected first- and second-trimester biomarkers
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
2013; 208 (6)
Abstract
The purpose of this study was to examine the relationship between typically measured prenatal screening biomarkers and early-preterm birth in euploid pregnancies.The study included 345 early-preterm cases (<30 weeks of gestation) and 1725 control subjects who were drawn from a population-based sample of California pregnancies who had both first- and second-trimester screening results. Logistic regression analyses were used to compare patterns of biomarkers in cases and control subjects and to develop predictive models. Replicability of the biomarker early-preterm relationships that was revealed by the models was evaluated by examination of the frequency and associated adjusted relative risks (RRs) for early-preterm birth and for preterm birth in general (<37 weeks of gestation) in pregnancies with identified abnormal markers compared with pregnancies without these markers in a subsequent independent California cohort of screened pregnancies (n = 76,588).The final model for early-preterm birth included first-trimester pregnancy-associated plasma protein A in the ≤5th percentile, second-trimester alpha-fetoprotein in the ≥95th percentile, and second-trimester inhibin in the ≥95th percentile (odds ratios, 2.3-3.6). In general, pregnancies in the subsequent cohort with a biomarker pattern that were found to be associated with early-preterm delivery in the first sample were at an increased risk for early-preterm birth and preterm birth in general (<37 weeks of gestation; adjusted RR, 1.6-27.4). Pregnancies with ≥2 biomarker abnormalities were at particularly increased risk (adjusted RR, 3.6-27.4).When considered across cohorts and in combination, abnormalities in routinely collected biomarkers reveal predictable risks for early-preterm birth.
View details for DOI 10.1016/j.ajog.2013.02.012
View details for Web of Science ID 000320596600029
View details for PubMedID 23395922
View details for PubMedCentralID PMC3672244
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Transdisciplinary translational science and the case of preterm birth
JOURNAL OF PERINATOLOGY
2013; 33 (4): 251-258
Abstract
Medical researchers have called for new forms of translational science that can solve complex medical problems. Mainstream science has made complementary calls for heterogeneous teams of collaborators who conduct transdisciplinary research so as to solve complex social problems. Is transdisciplinary translational science what the medical community needs? What challenges must the medical community overcome to successfully implement this new form of translational science? This article makes several contributions. First, it clarifies the concept of transdisciplinary research and distinguishes it from other forms of collaboration. Second, it presents an example of a complex medical problem and a concrete effort to solve it through transdisciplinary collaboration: for example, the problem of preterm birth and the March of Dimes effort to form a transdisciplinary research center that synthesizes knowledge on it. The presentation of this example grounds discussion on new medical research models and reveals potential means by which they can be judged and evaluated. Third, this article identifies the challenges to forming transdisciplines and the practices that overcome them. Departments, universities and disciplines tend to form intellectual silos and adopt reductionist approaches. Forming a more integrated (or 'constructionist'), problem-based science reflective of transdisciplinary research requires the adoption of novel practices to overcome these obstacles.
View details for DOI 10.1038/jp.2012.133
View details for PubMedID 23079774
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Hospital-wide breastfeeding rates vs. breastmilk provision for very-low-birth-weight infants
ACTA PAEDIATRICA
2013; 102 (3): 268-272
Abstract
To investigate the relationship between breastmilk feeding in very-low-birth-weight infants in the neonatal intensive care unit and breastmilk feeding rates for all newborns by hospital.This was a cross-sectional study of 111 California hospitals in 2007 and 2008. Correlation coefficients were calculated between overall hospital breastfeeding rates and breastmilk feeding rates of very-low-birth-weight infants. Hospitals were categorized in quartiles by crude and adjusted very-low-birth-weight infant rates to compare rankings between measures.Correlation between breastmilk feeding rates of very-low-birth-weight infants and overall breastfeeding rates varied by neonatal intensive care unit level of care from 0.13 for intermediate hospitals to 0.48 for regional hospitals. For hospitals categorized in the top quartile according to overall breastfeeding rate, only 46% were in the top quartile for both crude and adjusted very-low-birth-weight infant rates. On the other hand, when considering the lowest quartile for overall breastfeeding hospitals, three of 27 (11%) actually were performing in the top quartile of performance for very-low-birth-weight infant rates.Reporting hospital overall breastfeeding rates and neonatal intensive care unit breastmilk provision rates separately may give an incomplete picture of quality of care.
View details for DOI 10.1111/apa.12096
View details for Web of Science ID 000314656600022
View details for PubMedID 23174012
View details for PubMedCentralID PMC3566354
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Therapeutic hypothermia during neonatal transport: data from the California Perinatal Quality Care Collaborative (CPQCC) and California Perinatal Transport System (CPeTS) for 2010
JOURNAL OF PERINATOLOGY
2013; 33 (3): 194-197
Abstract
To evaluate cooling practices and neonatal outcomes in the state of California during 2010 using the California Perinatal Quality Care Collaborative and California Perinatal Transport System databases.Database analysis to determine the perinatal and neonatal demographics and outcomes of neonates cooled in transport or after admission to a cooling center.Of the 223 infants receiving therapeutic hypothermia for hypoxic ischemic encephalopathy (HIE) in California during 2010, 69% were cooled during transport. Despite the frequent use of cooling in transport, cooling center admission temperature was in the target range (33-34 °C) in only 62 (44%). Among cooled infants, gestational age was <35 weeks in 10 (4.5%). For outborn and transported infants, chronologic age at the time of cooling initiation was >6 h in 20 (11%). When initiated at the birth hospital, cooling was initiated at <6 h of age in 131 (92.9%).More than half of the infants cooled in transport do not achieve target temperature by the time of arrival at the cooling center. The use of cooling devices may improve temperature regulation on transport.
View details for DOI 10.1038/jp.2012.144
View details for Web of Science ID 000315664700006
View details for PubMedID 23223159
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Population Based Assessment Of Bronchopulmonary Dysplasia (bpd) Severity Following Discharge From The Neonatal Intensive Care Unit (nicu)
AMER THORACIC SOC. 2013
View details for Web of Science ID 000209839102644
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High Quality Genome-Wide Genotyping from Archived Dried Blood Spots without DNA Amplification.
PloS one
2013; 8 (5): e64710
Abstract
Spots of blood are routinely collected from newborn babies onto filter paper called Guthrie cards and used to screen for metabolic and genetic disorders. The archived dried blood spots are an important and precious resource for genomic research. Whole genome amplification of dried blood spot DNA has been used to provide DNA for genome-wide SNP genotyping. Here we describe a 96 well format procedure to extract DNA from a portion of a dried blood spot that provides sufficient unamplified genomic DNA for genome-wide single nucleotide polymorphism (SNP) genotyping. We show that SNP genotyping of the unamplified DNA is more robust than genotyping amplified dried blood spot DNA, is comparable in cost, and can be done with thousands of samples. This procedure can be used for genome-wide association studies and other large-scale genomic analyses that require robust, high-accuracy genotyping of dried blood spot DNA.
View details for DOI 10.1371/journal.pone.0064710
View details for PubMedID 23737996
View details for PubMedCentralID PMC3667813
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Accounting for variation in length of NICU stay for extremely low birth weight infants
JOURNAL OF PERINATOLOGY
2013; 33 (11): 872–76
Abstract
Objective:To develop a length of stay (LOS) model for extremely low birth weight (ELBW) infants.Study Design:We included infants from the California Perinatal Quality Care Collaborative with birth weight 401 to 1000 g who were discharged to home. Exclusion criteria were congenital anomalies, surgery and death. LOS was defined as days from admission to discharge. As patients who died or were transferred to lower level of care were excluded, we assessed correlation of hospital mortality rates and transfers to risk-adjusted LOS.Results:There were 2012 infants with median LOS 79 days (range 23 to 219). Lower birth weight, lack of antenatal steroids and lower Apgar score were associated with longer LOS. There was negligible correlation between risk-adjusted LOS and hospital mortality rates (r=0.0207) and transfer-out rates (r=0.121).Conclusion:Particularly because ELBW infants have extended hospital stays, identification of unbiased and informative risk-adjusted LOS for these infants is an important step in benchmarking best practice and improving efficiency in care.
View details for PubMedCentralID PMC3815522
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Correlation of Neonatal Intensive Care Unit Performance Across Multiple Measures of Quality of Care
JAMA PEDIATRICS
2013; 167 (1): 47-54
Abstract
To examine whether high performance on one measure of quality is associated with high performance on others and to develop a data-driven explanatory model of neonatal intensive care unit (NICU) performance.We conducted a cross-sectional data analysis of a statewide perinatal care database. Risk-adjusted NICU ranks were computed for each of 8 measures of quality selected based on expert input. Correlations across measures were tested using the Pearson correlation coefficient. Exploratory factor analysis was used to determine whether underlying factors were driving the correlations.Twenty-two regional NICUs in California.In total, 5445 very low-birth-weight infants cared for between January 1, 2004, and December 31, 2007.Pneumothorax, growth velocity, health care-associated infection, antenatal corticosteroid use, hypothermia during the first hour of life, chronic lung disease, mortality in the NICU, and discharge on any human breast milk.The NICUs varied substantially in their clinical performance across measures of quality. Of 28 unit-level correlations, 6 were significant (ρ < .05). Correlations between pairs of measures of quality of care were strong (ρ ≥ .5) for 1 pair, moderate (range, ρ ≥ .3 to ρ < .5) for 8 pairs, weak (range, ρ ≥ .1 to ρ < .3) for 5 pairs, and negligible (ρ < .1) for 14 pairs. Exploratory factor analysis revealed 4 underlying factors of quality in this sample. Pneumothorax, mortality in the NICU, and antenatal corticosteroid use loaded on factor 1; growth velocity and health care-associated infection loaded on factor 2; chronic lung disease loaded on factor 3; and discharge on any human breast milk loaded on factor 4.In this sample, the ability of individual measures of quality to explain overall quality of neonatal intensive care was modest.
View details for DOI 10.1001/jamapediatrics.2013.418
View details for Web of Science ID 000316797500010
View details for PubMedID 23403539
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Variations in Definitions of Mortality Have Little Influence on Neonatal Intensive Care Unit Performance Ratings
JOURNAL OF PEDIATRICS
2013; 162 (1): 50-U320
Abstract
To measure the influence of varying mortality time frames on performance rankings among regional neonatal intensive care units (NICUs) in a large state.We performed a cross-sectional data analysis of very low birth weight infants receiving care at 24 level 3 NICUs. We tested the effect of 4 definitions of mortality: (1) death between admission and end of birth hospitalization or up to 366 days; (2) death between 12 hours of age and the end of birth hospitalization or up to 366 days; (3) death between admission and 28 days; and (4) death between 12 hours of age and 28 days. NICUs were ranked by quantifying their deviation from risk-adjusted expected mortality and dividing them into 3 tiers: top 6, bottom 6, and in between.There was wide interinstitutional variation in risk-adjusted mortality for each definition (observed minus expected z-score range, -6.08 to 3.75). However, mortality-based NICU rankings and classification into performance tiers were very similar for all institutions in each of our time frames. Among all 4 definitions, NICU rank correlations were high (>0.91). Few NICUs changed relative to a neighboring tier with changes in definitions, and none changed by more than one tier.The time frame used to ascertain mortality had little effect on comparative NICU performance.
View details for DOI 10.1016/j.jpeds.2012.06.002
View details for Web of Science ID 000312915900012
View details for PubMedID 22854328
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Maternal morbidity during childbirth hospitalization in California
JOURNAL OF MATERNAL-FETAL & NEONATAL MEDICINE
2012; 25 (12): 2529-2535
Abstract
To determine the incidence and risk factors for maternal morbidity during childbirth hospitalization.Maternal morbidities were determined using ICD9-CM and vital records codes from linked hospital discharge and vital records data for 1,572,909 singleton births in California during 2005-2007. Socio-demographic, obstetric and hospital volume risk factors were estimated using mixed effects logistic regression models.The maternal morbidity rate was 241/1000 births. The most common morbidities were episiotomy, pelvic trauma, maternal infection, postpartum hemorrhage and severe laceration. Preeclampsia (adjusted odds ratio [AOR]: 2.96; 95% confidence interval 2.8,3.13), maternal age over 35 years, (AOR: 1.92; 1.79,2.06), vaginal birth after cesarean, (AOR: 1.81; 1.47,2.23) and repeat cesarean birth (AOR: 1.99; 1.87,2.12) conferred the highest odds of severe morbidity. Non-white women were more likely to suffer morbidity.Nearly one in four California women experienced complications during childbirth hospitalization. Significant health disparities in maternal childbirth outcomes persist in the USA.
View details for DOI 10.3109/14767058.2012.710280
View details for Web of Science ID 000311678300011
View details for PubMedID 22779781
View details for PubMedCentralID PMC3642201
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Creating a Public Agenda for Maternity Safety and Quality in Cesarean Delivery
OBSTETRICS AND GYNECOLOGY
2012; 120 (5): 1194-1198
Abstract
Cesarean delivery rates in California and the United States rose by 50% between 1998 and 2008 and vary widely among states, regions, hospitals, and health care providers. The leading driver of both the rise and the variation is first-birth cesarean deliveries performed during labor. With the large increase in primary cesarean deliveries, repeat cesarean delivery now has emerged as the largest single indication. The economic costs, health risks, and negligible benefits for most mothers and newborns of these higher rates point to the urgent need for a new approach to working with women in labor. This commentary analyzes the high rates and wide variations and presents evidence of costs and risks associated with cesarean deliveries (complete discussion provided in the California Maternal Quality Care Collaborative White Paper at www.cmqcc.org/white_paper). All stakeholders need to ask whether society can afford the costs and complications of this high cesarean delivery rate and whether they can work together toward solutions. The factors involved in the rise in cesarean deliveries point to the need for a multistrategy approach, because no single strategy is likely to be effective or lead to sustained change. We outline complementary strategies for reducing the rates and offer recommendations including clinical improvement strategies with careful examination of labor management practices; payment reform to eliminate negative or perverse incentives; education to recognize the value of vaginal birth; and full transparency through public reporting and continued public engagement.
View details for DOI 10.1097/AOG.0b013e31826fc13d
View details for Web of Science ID 000310512500027
View details for PubMedID 23090538
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Factors Associated with Failure to Screen Newborns for Retinopathy of Prematurity
JOURNAL OF PEDIATRICS
2012; 161 (5): 819-823
Abstract
To evaluate ROP screening rates in a population-based cohort; and to identify characteristics of patients that were missed.We used the California Perinatal Quality Care Collaborative data from 2005-2007 for a cross-sectional study. Using eligibility criteria, screening rates were calculated for each hospital. Multivariable regression was used to assess associations between patient clinical and sociodemographic factors and the odds of missing screening.Overall rates of missed ROP screening decreased from 18.6% in 2005 to 12.8% in 2007. Higher gestational age (OR = 1.25 for increase of 1 week, 95% CI, 1.21-1.29), higher birth weight (OR = 1.13; 95% CI, 1.10-1.15), and singleton birth (OR = 1.2; 95% CI, 1.07-1.34) were associated with higher probability of missing screening. Level II neonatal intensive care units and neonatal intensive care units with lower volume were more likely to miss screenings.Although ROP screening rates improved over time, larger and older infants are at risk for not receiving screening. Furthermore, large variations in screening rates exist among hospitals in California. Identification of gaps in quality of care creates an opportunity to improve ROP screening rates and prevent impaired vision in this vulnerable population.
View details for DOI 10.1016/j.jpeds.2012.04.020
View details for Web of Science ID 000310370600013
View details for PubMedID 22632876
View details for PubMedCentralID PMC3470784
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Creating a Public Agenda for Maternity Safety and Quality in Cesarean Delivery.
Obstetrics and gynecology
2012
View details for DOI 10.1097/AOG.0b013e31826fc13d
View details for PubMedID 23044535
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Missed Opportunities in the Referral of High-Risk Infants to Early Intervention
PEDIATRICS
2012; 129 (6): 1027-1034
Abstract
Using a statewide population-based data source, we describe current neonatal follow-up referral practices for high-risk infants with developmental delays throughout California.From a cohort analysis of quality improvement data from 66 neonatal follow-up programs in the California Children's Services and California Perinatal Quality Care Collaborative High-Risk Infant Follow-Up Quality of Care Initiative, 5129 high-risk infants were evaluated at the first visit between 4 and 8 months of age in neonatal follow-up. A total of 1737 high-risk infants were evaluated at the second visit between 12 and 16 months of age. We calculated referral rates in relation to developmental status (high versus low concern) based on standardized developmental testing or screening.Among infants with low concerns (standard score >70 or passed screen) at the first visit, 6% were referred to early intervention; among infants with high concerns, 28% of infants were referred to early intervention. Even after including referrals to other (private) therapies, 34% infants with high concerns did not receive any referrals. These rates were similar for the second visit.In spite of the specialization of neonatal follow-up programs to identify high-risk infants with developmental delays, a large proportion of potentially eligible infants were not referred to early intervention.
View details for DOI 10.1542/peds.2011-2720
View details for PubMedID 22614772
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Therapeutic Hypothermia during Neonatal Transport: Current Practices in California
AMERICAN JOURNAL OF PERINATOLOGY
2012; 29 (5): 319-326
Abstract
Therapeutic hypothermia initiated at <6 hours of age reduces death and disability in newborns ≥ 36 weeks' gestation with moderate to severe hypoxic ischemic encephalopathy. Given the limited therapeutic window, cooling during transport becomes a necessity. Our goal was to describe the current practice of therapeutic hypothermia during transport used in the state of California. All level III neonatal intensive care units (NICUs) were contacted to identify those units providing therapeutic hypothermia. An electronic questionnaire was sent to obtain basic information. Responses were received from 28 (100%) NICUs performing therapeutic hypothermia; 26 NICUs were cooling newborns and two were in the process of program development. Eighteen (64%) centers had cooled a patient in transport, six had not yet cooled in transport, and two do not plan to cool in transport. All 18 centers use passive cooling, except for two that perform both passive and active cooling, and 17 of 18 centers recommend initiation of cooling at the referral hospital. Reported difficulties include overcooling, undercooling, and bradycardia. Cooling on transport is being performed by majority of NICUs providing therapeutic hypothermia. Clinical protocols and devices for cooling in transport are essential to ensure safety and efficacy.
View details for DOI 10.1055/s-0031-1295661
View details for Web of Science ID 000302962200001
View details for PubMedID 22143969
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Risk of bronchopulmonary dysplasia by second-trimester maternal serum levels of alpha-fetoprotein, human chorionic gonadotropin, and unconjugated estriol
PEDIATRIC RESEARCH
2012; 71 (4): 399-406
Abstract
Although maternal serum α-fetoprotein (AFP), human chorionic gonandotropin (hCG), and estriol play important roles in immunomodulation and immunoregulation during pregnancy, their relationship with the development of bronchopulmonary dysplasia (BPD) in young infants is unknown despite BPD being associated with pre- and postnatal inflammatory factors.We found that these serum biomarkers were associated with an increased risk of BPD. Risks were especially high when AFP and/or hCG levels were above the 95th percentile and/or when unconjugated estriol (uE3) levels were below the 5th percentile (relative risks (RRs) 3.1-6.7). Risks increased substantially when two or more biomarker risks were present (RRs 9.9-75.9).Data suggested that pregnancies that had a biomarker risk and yielded an offspring with BPD were more likely to have other factors present that suggested early intrauterine fetal adaptation to stress, including maternal hypertension and asymmetric growth restriction.The objective of this population-based study was to examine whether second-trimester levels of AFP, hCG, and uE3 were associated with an increased risk of BPD.
View details for DOI 10.1038/pr.2011.73
View details for Web of Science ID 000301884500013
View details for PubMedID 22391642
View details for PubMedCentralID PMC3616500
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Do practicing clinicians agree with expert ratings of neonatal intensive care unit quality measures?
JOURNAL OF PERINATOLOGY
2012; 32 (4): 247-252
Abstract
To assess the level of agreement when selecting quality measures for inclusion in a composite index of neonatal intensive care quality (Baby-MONITOR) between two panels: one comprised of academic researchers (Delphi) and another comprised of academic and clinical neonatologists (clinician).In a modified Delphi process, a panel rated 28 quality measures. We assessed clinician agreement with the Delphi panel by surveying a sample of 48 neonatal intensive care practitioners. We asked the clinician group to indicate their level of agreement with the Delphi panel for each measure using a five-point scale (much too high, slightly too high, reasonable, slightly too low and much too low). In addition, we asked clinicians to select measures for inclusion in the Baby-MONITOR based on a yes or no vote and a pre-specified two-thirds majority for inclusion.In all, 23 (47.9%) of the clinicians responded to the survey. We found high levels of agreement between the Delphi and clinician panels, particularly across measures selected for the Baby-MONITOR. Clinicians selected the same nine measures for inclusion in the composite as the Delphi panel. For these nine measures, 74% of clinicians indicated that the Delphi panel rating was 'reasonable'.Practicing clinicians agree with an expert panel on the measures that should be included in the Baby-MONITOR, enhancing face validity.
View details for DOI 10.1038/jp.2011.199
View details for Web of Science ID 000302189200002
View details for PubMedID 22241483
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Trends in Cesarean Delivery for Twin Births in the United States: 1995-2008 Reply
OBSTETRICS AND GYNECOLOGY
2012; 119 (3): 658-659
View details for DOI 10.1097/AOG.0b013e318248f682
View details for Web of Science ID 000300637400029
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Trends in Cesarean Delivery for Twin Births in the United States 1995-2008
OBSTETRICS AND GYNECOLOGY
2011; 118 (5): 1095-1101
Abstract
To estimate trends and risk factors for cesarean delivery for twins in the United States.This was a cross-sectional study in which we calculated cesarean delivery rates for twins from 1995 to 2008 using National Center for Health Statistics data. We compared cesarean delivery rates by year and for vertex compared with breech presentation. The order of presentation for a given twin pair could not be determined from the available records and therefore analysis was based on individual discrete twin data. Multivariable logistic regression was used to estimate independent risk factors, including year of birth and maternal factors, for cesarean delivery.Cesarean delivery rates for twin births increased steadily from 53.4% to 75.0% in 2008. Rates rose for the breech twin category (81.5%-92.1%) and the vertex twin category (45.1%-68.2%). The relative increase in the cesarean delivery rate for preterm and term neonates was similar. After risk adjustment, there was an average increase noted in cesarean delivery of 5% each year during the study period (risk ratio 1.05, 95% confidence interval 1.04-1.05).Cesarean delivery rates for twin births increased dramatically from 1995 to 2008. This increase is significantly higher than that which could be explained by an increase in cesarean delivery for breech presentation of either the presenting or second twin.
View details for DOI 10.1097/AOG.0b013e3182318651
View details for Web of Science ID 000296292600018
View details for PubMedID 22015878
View details for PubMedCentralID PMC3202294
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Formal selection of measures for a composite index of NICU quality of care: Baby-MONITOR
JOURNAL OF PERINATOLOGY
2011; 31 (11): 702-710
Abstract
To systematically rate measures of care quality for very low birth weight infants for inclusion into Baby-MONITOR, a composite indicator of quality.Modified Delphi expert panelist process including electronic surveys and telephone conferences. Panelists considered 28 standard neonatal intensive care unit (NICU) quality measures and rated each on a 9-point scale taking into account pre-defined measure characteristics. In addition, panelists grouped measures into six domains of quality. We selected measures by testing for rater agreement using an accepted method.Of 28 measures considered, 13 had median ratings in the high range (7 to 9). Of these, 9 met the criteria for inclusion in the composite: antenatal steroids (median (interquartile range)) 9(0), timely retinopathy of prematurity exam 9(0), late onset sepsis 9(1), hypothermia on admission 8(1), pneumothorax 8(2), growth velocity 8(2), oxygen at 36 weeks postmenstrual age 7(2), any human milk feeding at discharge 7(2) and in-hospital mortality 7(2). Among the measures selected for the composite, the domains of quality most frequently represented included effectiveness (40%) and safety (30%).A panel of experts selected 9 of 28 routinely reported quality measures for inclusion in a composite indicator. Panelists also set an agenda for future research to close knowledge gaps for quality measures not selected for the Baby-MONITOR.
View details for DOI 10.1038/jp.2011.12
View details for Web of Science ID 000296590600003
View details for PubMedID 21350429
View details for PubMedCentralID PMC3205234
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The Impact of Statistical Choices on Neonatal Intensive Care Unit Quality Ratings Based on Nosocomial Infection Rates
ARCHIVES OF PEDIATRICS & ADOLESCENT MEDICINE
2011; 165 (5): 429-434
Abstract
To examine the extent to which performance assessment methods affect the percentage of neonatal intensive care units (NICUs) and very low-birth-weight (VLBW) infants included in performance assessments, the distribution of NICU performance ratings, and the level of agreement in those ratings.Cross-sectional study based on risk-adjusted nosocomial infection rates.NICUs belonging to the California Perinatal Quality Care Collaborative 2007-2008.One hundred twenty-six California NICUs and 10 487 VLBW infants.Three performance assessment choices: (1) excluding "low-volume" NICUs (those caring for <30 VLBW infants per year) vs a criterion based on confidence intervals, (2) using Bayesian vs frequentist hierarchical models, and (3) pooling data across 1 vs 2 years.Proportion of NICUs and patients included in quality assessment, distribution of ratings for NICUs, and agreement between methods using the κ statistic.Depending on the methods applied, 51% to 85% of NICUs and 72% to 96% of VLBW infants were included in performance assessments, 76% to 87% of NICUs were considered "average," and the level of agreement between NICU ratings ranged from 0.23 to 0.89.The percentage of NICUs included in performance assessments and their ratings can shift dramatically depending on performance measurement method. Physicians, payers, and policymakers should continue to closely examine which existing performance assessment methods are most appropriate for evaluating pediatric care quality.
View details for Web of Science ID 000290113500009
View details for PubMedID 21536958
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Hypothermia in very low birth weight infants: distribution, risk factors and outcomes
JOURNAL OF PERINATOLOGY
2011; 31: S49-S56
Abstract
The objective of this study was to study the epidemiology of neonatal hypothermia in preterm infants using World Health Organization (WHO) temperature criteria.A population-based cohort of 8782 very low birth weight (VLBW) infants born in California neonatal intensive care units in 2006 and 2007. Associations between admission hypothermia and maternal and neonatal characteristics and outcomes were determined using logistic regression.In all, 56.2% of infants were hypothermic. Low birth weight, cesarean delivery and a low Apgar score were associated with hypothermia. Spontaneous labor, prolonged rupture of membranes and antenatal steroid administration were associated with decreased risk of hypothermia. Moderate hypothermia was associated with higher risk of intraventricular hemorrhage (IVH). Moderate and severe hypothermic conditions were associated with risk of death.Hypothermia by WHO criteria is prevalent in VLBW infants and is associated with IVH and mortality. Use of WHO criteria could guide the need for quality improvement projects targeted toward the most vulnerable infants.
View details for DOI 10.1038/jp.2010.177
View details for Web of Science ID 000289236900008
View details for PubMedID 21448204
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Editor's perspective of Festschrift: a festival of writings TRIBUTE
JOURNAL OF PERINATOLOGY
2011; 31: S1-S16
View details for DOI 10.1038/jp.2010.189
View details for Web of Science ID 000289236900001
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Nosocomial Infection Reduction in VLBW Infants With a Statewide Quality-Improvement Model
PEDIATRICS
2011; 127 (3): 419-426
Abstract
To evaluate the effectiveness of the California Perinatal Quality Care Collaborative quality-improvement model using a toolkit supplemented by workshops and Web casts in decreasing nosocomial infections in very low birth weight infants.This was a retrospective cohort study of continuous California Perinatal Quality Care Collaborative members' data during the years 2002-2006. The primary dependent variable was nosocomial infection, defined as a late bacterial or coagulase-negative staphylococcal infection diagnosed after the age of 3 days by positive blood/cerebro-spinal fluid culture(s) and clinical criteria. The primary independent variable of interest was voluntary attendance at the toolkit's introductory event, a direct indicator that at least 1 member of an NICU team had been personally exposed to the toolkit's features rather than being only notified of its availability. The intervention's effects were assessed using a multivariable logistic regression model that risk adjusted for selected demographic and clinical factors.During the study period, 7733 eligible very low birth weight infants were born in 27 quality-improvement participant hospitals and 4512 very low birth weight infants were born in 27 non-quality-improvement participant hospitals. For the entire cohort, the rate of nosocomial infection decreased from 16.9% in 2002 to 14.5% in 2006. For infants admitted to NICUs participating in at least 1 quality-improvement event, there was an associated decreased risk of nosocomial infection (odds ratio: 0.81 [95% confidence interval: 0.68-0.96]) compared with those admitted to nonparticipating hospitals.The structured intervention approach to quality improvement in the NICU setting, using a toolkit along with attendance at a workshop and/or Web cast, is an effective means by which to improve care outcomes.
View details for DOI 10.1542/peds.2010-1449
View details for Web of Science ID 000287845400043
View details for PubMedID 21339273
View details for PubMedCentralID PMC3387911
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Antenatal Steroid Administration for Premature Neonates in California
OBSTETRICS AND GYNECOLOGY
2011; 117 (3): 603-609
Abstract
To estimate risk factors for premature neonates not receiving antenatal steroids in a population-based cohort and to determine whether the gains of a quality-improvement collaborative project on antenatal steroid administration were sustained long-term.Clinical data for premature neonates born in 2005–2007 were obtained from the California Perinatal Quality Care Collaborative, which collects data on more than 90% of neonatal admissions in California. Eligible neonates had a birth weight of less than 1,500 g or gestational age less than 34 weeks and were born at a Collaborative hospital. These data were linked to administrative data from California Vital Statistics. Sociodemographic and medical risk factors for not receiving antenatal steroids were determined. We also examined the effect of birth hospital participation in a previous quality-improvement collaborative project. A random effects logistic regression model was used to determine independent risk factors.Of 15,343 eligible neonates, 23.1% did not receive antenatal steroids in 2005–2007. Hispanic mothers (25.6%), mothers younger than age 20 (27.6%), and those without prenatal care (52.2%) were less likely to receive antenatal steroids. Mothers giving birth vaginally (26.8%) and mothers with a diagnosis of fetal distress (26.5%) were also less likely to receive antenatal steroids. Rupture of membranes before delivery and multiple gestations were associated with higher likelihood of antenatal steroid administration. Hospitals that participated in a quality-improvement collaborative in 1999– 2000 had higher rates of antenatal steroid administration (85% compared with 69%, P<.001).A number of eligible mothers do not receive antenatal steroids. Quality-improvement initiatives to improve antenatal steroid administration could target specific high-risk groups.
View details for DOI 10.1097/AOG.0b013e31820c3c9b
View details for Web of Science ID 000287649400013
View details for PubMedID 21446208
View details for PubMedCentralID PMC3072287
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MISSED OPPORTUNITIES IN HIGH RISK INFANT FOLLOW-UP?
LIPPINCOTT WILLIAMS & WILKINS. 2011: 95
View details for Web of Science ID 000285542500042
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The Effect of Preterm Premature Rupture of Membranes on Neonatal Mortality Rates
30th Annual Clinical Meeting of the Society-for-Maternal-Fetal-Medicine
LIPPINCOTT WILLIAMS & WILKINS. 2010: 1381–86
Abstract
To estimate the effect of preterm premature rupture of membranes (PROM) on neonatal mortality.A cross-sectional study using a state perinatal database (California Perinatal Quality Care Collaborative) was performed. Prenatal data, including ruptured membranes, corticosteroid administration, maternal age, maternal race, maternal hypertension, mode of delivery, and prenatal care, were recorded. Mortality rates were compared for neonates born between 24 and 34 weeks of gestation without preterm PROM to those with recent (less than 18 hours before delivery) and prolonged (more than 18 hours before delivery) preterm PROM. Neonatal sepsis rates were also examined.Neonates born between 24 0/7 and 34 0/7 weeks of gestation from 127 California neonatal intensive care units between 2005 and 2007 were included (N=17,501). When analyzed by 2-week gestational age groups, there were no differences in mortality rates between those born with and without membrane rupture before delivery. The presence of prolonged preterm PROM was associated with decreased mortality at 24 to 26 weeks of gestation (18% compared with 31% for recent preterm PROM; odds ratio [OR] 1.79; confidence interval [CI] 1.25-2.56) but increased mortality at 28 to 30 weeks of gestation (4% compared with 3% for recent preterm PROM; OR 0.44; CI 0.22, 0.88) when adjusted for possible confounding factors. Sepsis rates did not differ between those with recent or prolonged preterm PROM at any gestational age.The presence of membrane rupture before delivery was not associated with increased neonatal mortality in any gestational age group. The effects of a prolonged latency period were not consistent across gestational ages.
View details for DOI 10.1097/AOG.0b013e3181fe3d28
View details for Web of Science ID 000284491000021
View details for PubMedID 21099606
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Low Apgar score and mortality in extremely preterm neonates born in the United States
ACTA PAEDIATRICA
2010; 99 (12): 1785-1789
Abstract
To investigate the relationship between low Apgar score and neonatal mortality in preterm neonates.Infant birth and death certificate data from the US National Center for Health Statistics for 2001-2002 were analysed. Primary outcome was 28-day mortality for 690, 933 neonates at gestational ages 24-36 weeks. Mortality rates were calculated for each combination of gestational age and 5-min Apgar score. Relative risks of mortality, by high vs. low Apgar score, were calculated for each age.Distribution of Apgar scores depended on gestational age, the youngest gestational ages having higher proportions of low Apgar scores. Median Apgar score ranged from 6 at 24 weeks, to 9 at 30-36 weeks gestation. The relative risk of death was significantly higher at Apgar scores 0-3 vs. 7-10, including at the youngest gestational ages, ranging from 3.1 (95% confidence interval 2.9, 3.4) at 24 weeks to 18.5 (95% confidence interval 15.7, 21.8) at 28 weeks. Low Apgar score was associated with increased mortality in premature neonates, including those at 24-28 weeks gestational age, and may be a useful tool for clinicians in assessing prognosis and for researchers as a risk prediction variable.
View details for DOI 10.1111/j.1651-2227.2010.01935.x
View details for Web of Science ID 000283690300010
View details for PubMedID 20626363
View details for PubMedCentralID PMC2970674
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Maternal Nativity Status and Birth Outcomes in Asian Immigrants
JOURNAL OF IMMIGRANT AND MINORITY HEALTH
2010; 12 (5): 798-805
Abstract
The study examines the relationship between maternal nativity, maternal risks and birth outcomes in six Asian sub-populations.U.S.- versus foreign-born immigrants of Chinese (67,222), Japanese (18,275) and Filipino (87,1208), Vietnamese (45,229), Cambodian/Laotian (21,237), and Korean (23,430) singleton live births were assessed for maternal risks and birth outcomes.U.S.-born Chinese and Japanese mothers had lower risk and increased preterm births but similar infant mortality, while U.S.-born Filipino mothers had higher risk and higher infant mortality. U.S.-born mothers of more recent Cambodian/Laotian and Vietnamese immigrants had higher risk and delivered more small and preterm births, while U.S.-born Korean mothers had higher risk but no differences in preterm and low birthweight delivery.Asians in America are a distinctly heterogenous population in terms of the relationship between maternal risk factors and birth outcomes and the influence of maternal nativity on this relationship.
View details for DOI 10.1007/s10903-008-9215-6
View details for Web of Science ID 000281506000022
View details for PubMedID 19083097
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Integration of Early Physiological Responses Predicts Later Illness Severity in Preterm Infants
SCIENCE TRANSLATIONAL MEDICINE
2010; 2 (48)
Abstract
Physiological data are routinely recorded in intensive care, but their use for rapid assessment of illness severity or long-term morbidity prediction has been limited. We developed a physiological assessment score for preterm newborns, akin to an electronic Apgar score, based on standard signals recorded noninvasively on admission to a neonatal intensive care unit. We were able to accurately and reliably estimate the probability of an individual preterm infant's risk of severe morbidity on the basis of noninvasive measurements. This prediction algorithm was developed with electronically captured physiological time series data from the first 3 hours of life in preterm infants (< or =34 weeks gestation, birth weight < or =2000 g). Extraction and integration of the data with state-of-the-art machine learning methods produced a probability score for illness severity, the PhysiScore. PhysiScore was validated on 138 infants with the leave-one-out method to prospectively identify infants at risk of short- and long-term morbidity. PhysiScore provided higher accuracy prediction of overall morbidity (86% sensitive at 96% specificity) than other neonatal scoring systems, including the standard Apgar score. PhysiScore was particularly accurate at identifying infants with high morbidity related to specific complications (infection: 90% at 100%; cardiopulmonary: 96% at 100%). Physiological parameters, particularly short-term variability in respiratory and heart rates, contributed more to morbidity prediction than invasive laboratory studies. Our flexible methodology of individual risk prediction based on automated, rapid, noninvasive measurements can be easily applied to a range of prediction tasks to improve patient care and resource allocation.
View details for DOI 10.1126/scitranslmed.3001304
View details for Web of Science ID 000288436900003
View details for PubMedID 20826840
View details for PubMedCentralID PMC3564961
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Prediction of Death for Extremely Premature Infants in a Population-Based Cohort
PEDIATRICS
2010; 126 (3): E644-E650
Abstract
Although gestational age (GA) is often used as the primary basis for counseling and decision-making for extremely premature infants, a study of tertiary care centers showed that additional factors could improve prediction of outcomes. Our objective was to determine how such a model could improve predictions for a population-based cohort.From 2005 to 2008, data were collected prospectively for the California Perinatal Quality Care Collaborative, which encompasses 90% of NICUs in California. For infants born at GAs of 22 to 25 weeks, we assessed the ability of the Eunice Kennedy Shriver National Institute of Child Health and Human Development 5-factor model to predict survival rates, compared with a model using GA alone.In the study cohort of 4527 infants, 3647 received intensive care. Survival rates were 53% for the whole cohort and 66% for infants who received intensive care. In multivariate analyses of data for infants who received intensive care, prenatal steroid exposure, female sex, singleton birth, and higher birth weight (per 100-g increment) were each associated with a reduction in the risk of death before discharge similar to that for a 1-week increase in GA. The multivariate model increased the ability to group infants in the highest and lowest risk categories (mortality rates of >80% and <20%, respectively).In a population-based cohort, the addition of prenatal steroid exposure, sex, singleton or multiple birth, and birth weight to GA allowed for improved prediction of rates of survival to discharge for extremely premature infants.
View details for DOI 10.1542/peds.2010-0097
View details for Web of Science ID 000281535700047
View details for PubMedID 20713479
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Impact of Timing of Birth and Resident Duty-Hour Restrictions on Outcomes for Small Preterm Infants
PEDIATRICS
2010; 126 (2): 222-231
Abstract
The goal was to examine the impact of birth at night, on the weekend, and during July or August (the first months of the academic year) and the impact of resident duty-hour restrictions on mortality and morbidity rates for very low birth weight infants.Outcomes were analyzed for 11,137 infants with birth weights of 501 to 1250 g who were enrolled in the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network registry in 2001-2005. Approximately one-half were born before the introduction of resident duty-hour restrictions in 2003. Follow-up assessments at 18 to 22 months were completed for 4508 infants. Mortality rate, short-term morbidities, and neurodevelopmental outcome were examined with respect to the timing of birth.There was no effect of the timing of birth on mortality rate and no impact on the risks of short-term morbidities except that the risk of retinopathy of prematurity (stage > or =2) was higher after the introduction of duty-hour restrictions and the risk of retinopathy of prematurity requiring operative treatment was lower for infants born during the late night than during the day. There was no impact of the timing of birth on neurodevelopmental outcome except that the risk of hearing impairment or death was slightly lower among infants born in July or August.In this network, the timing of birth had little effect on the risks of death and morbidity for very low birth weight infants, which suggests that staffing patterns were adequate to provide consistent care.
View details for DOI 10.1542/peds.2010-0456
View details for Web of Science ID 000280565700005
View details for PubMedID 20643715
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National Institutes of Health Consensus Development Conference: Lactose Intolerance and Health
ANNALS OF INTERNAL MEDICINE
2010; 152 (12): 792-?
View details for Web of Science ID 000278827700005
View details for PubMedID 20404261
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The Role of Regional Collaboratives: The California Perinatal Quality Care Collaborative Model
CLINICS IN PERINATOLOGY
2010; 37 (1): 71-?
Abstract
Improving the outcome of the infants cared for in one's neonatal intensive care unit is the main objective of improvement projects that are pursued independently or as a member of a national collaborative. Regional quality improvement collaborations represent the intersection of hospital-based and community-based medicine offering the possibility of coordinated improvement efforts conducted at both the hospital and community level. This article discusses the aspirations, workings, and achievements of the California Perinatal Quality Care Collaborative, a regional collaboration formed to improve perinatal care. While it is never easy to align the often differing fundamental positions held by the various member factions and stakeholder groups, the common goal of a universally agreed-upon mission statement can act as a magnet drawing the various components together. Rapid development of a first quality improvement initiative is an effective strategy to engage the participants in a way that allows them to demonstrate, share, and build upon their individual expertise, and provides them a strong sense of professional accomplishment.
View details for DOI 10.1016/j.clp.2010.01.004
View details for Web of Science ID 000277244200006
View details for PubMedID 20363448
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NIH consensus development conference statement: Lactose intolerance and health.
NIH consensus and state-of-the-science statements
2010; 27 (2): 1-27
Abstract
To provide health care providers, patients, and the general public with a responsible assessment of currently available data on lactose intolerance and health.A non-DHHS, nonadvocate 14-member panel representing the fields of internal medicine, pediatrics, pediatric and adult endocrinology, gastroenterology, hepatology, neonatology and perinatology, geriatrics, racial/ethnic disparities, radiology, maternal and fetal nutrition, vitamin and mineral metabolism, nutritional sciences, bone health, preventive medicine, biopsychology, biostatistics, statistical genetics, epidemiology, and a public representative. In addition, 22 experts from pertinent fields presented data to the panel and conference audience.Presentations by experts and a systematic review of the literature prepared by the University of Minnesota Evidence-based Practice Center, through the Agency for Healthcare Research and Quality. Scientific evidence was given precedence over anecdotal experience.The panel drafted its statement based on scientific evidence presented in open forum and on published scientific literature. The draft statement was presented on the final day of the conference and circulated to the audience for comment. The panel released a revised statement later that day at http://consensus.nih.gov. This statement is an independent report of the panel and is not a policy statement of the NIH or the Federal Government.• Lactose intolerance is a real and important clinical syndrome, but its true prevalence is not known. • The majority of people with lactose malabsorption do not have clinical lactose intolerance. Many individuals who think they are lactose intolerant are not lactose malabsorbers. • Many individuals with real or perceived lactose intolerance avoid dairy and ingest inadequate amounts of calcium and vitamin D, which may predispose them to decreased bone accrual, osteoporosis, and other adverse health outcomes. In most cases, individuals do not need to eliminate dairy consumption completely. • Evidence-based dietary approaches with and without dairy foods and supplementation strategies are needed to ensure appropriate consumption of calcium and other nutrients in lactose-intolerant individuals. • Educational programs and behavioral approaches for individuals and their healthcare providers should be developed and validated to improve the nutrition and symptoms of individuals with lactose intolerance and dairy avoidance.
View details for PubMedID 20186234
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Epidemiology of Breech Delivery
TEXTBOOK OF PERINATAL EPIDEMIOLOGY
2010: 663–77
View details for Web of Science ID 000284237200030
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BREASTMILK FEEDING OF VERY LOW BIRTH WEIGHT INFANTS AS A FUNCTION OF HOSPITAL PERCENTAGE OF MINORITIES
BMJ PUBLISHING GROUP. 2010: 140
View details for Web of Science ID 000273638400147
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The effect of ruptured membranes on early neonatal sepsis
30th Annual Clinical Meeting of the Society-for-Maternal-Fetal-Medicine
MOSBY-ELSEVIER. 2009: S168–S168
View details for Web of Science ID 000279559500437
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Do ruptured membranes remote from term affect neonatal mortality?
30th Annual Clinical Meeting of the Society-for-Maternal-Fetal-Medicine
MOSBY-ELSEVIER. 2009: S167–S168
View details for Web of Science ID 000279559500436
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Factors Influencing Breast Milk versus Formula Feeding at Discharge for Very Low Birth Weight Infants in California
JOURNAL OF PEDIATRICS
2009; 155 (5): 657-U94
Abstract
To investigate incidence and factors influencing breast milk feeding at discharge for very low birth weight infants (VLBW) in a population-based cohort.We used data from the California Perinatal Quality Care Collaborative to calculate incidence of breast milk feeding at hospital discharge for 6790 VLBW infants born in 2005-2006. Multivariable logistic regression was used to examine which sociodemographic and medical factors were associated with breast milk feeding. The impact of removing risk adjustment for race was examined.At initial hospital discharge, 61.1% of VLBW infants were fed breast milk or breast milk supplemented with formula. Breast milk feeding was more common with higher birth weight and gestational age. After risk adjustment, multiple birth was associated with higher breast milk feeding. Factors associated with exclusive formula feeding were Hispanic ethnicity, African American race, and no prenatal care. Hospital risk-adjusted rates of breast milk feeding varied widely (range 19.7% to 100%) and differed when race was removed from adjustment.A substantial number of VLBW infants were not fed breast milk at discharge. Specific groups may benefit from targeted interventions to promote breast milk feeding. There may be benefit to reporting risk-adjusted rates both including and excluding race in adjustment when considering quality improvement initiatives.
View details for DOI 10.1016/j.jpeds.2009.04.064
View details for Web of Science ID 000271570900014
View details for PubMedID 19628218
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From Paradox to Disparity: Trends in Neonatal Death in Very Low Birth Weight non-Hispanic Black and White Infants, 1989-2004
JOURNAL OF PEDIATRICS
2009; 155 (4): 482-487
Abstract
To examine temporal trends in race-specific neonatal death in California to determine whether the overall decline in mortality attenuated the paradoxical survival advantage of very low birth weight (VLBW; birth weight < 1500 g) non-Hispanic black infants relative to VLBW non-Hispanic white infants.The data set comprised the California birth cohort file on non-Hispanic black and non-Hispanic white VLBW neonatal mortality for 1989-2004. Logistic regression methods were used to control for potentially confounding maternal characteristics.In 1989 and 1990, non-Hispanic black VLBW infants demonstrated a paradox of lower neonatal mortality (adjusted odds ratio [aOR] = 0.84; 95% confidence interval [CI] = 0.75-0.94). This survival advantage disappeared after 1991, however. In 2003 and 2004, the incidence of neonatal mortality increased in non-Hispanic black VLBW infants but decreased in non-Hispanic white VLBW infants, resulting in a racial disparity (aOR = 1.34; 95% CI = 1.14-1.56).An initial survival paradox transformed into a disparity. The magnitude of this non-Hispanic black/non-Hispanic white VLBW disparity rose to its highest levels in the last 2 years of the study period. Moreover, the steady mortality increase in VLBW non-Hispanic black VLBW infants since 2001 reversed the secular decline in neonatal mortality in this population. Our findings underscore the need to augment strategies to improve the health trajectory of gestation in non-Hispanic black women.
View details for DOI 10.1016/j.jpeds.2009.04.038
View details for Web of Science ID 000270497800008
View details for PubMedID 19615693
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Mortality and Morbidity by Month of Birth of Neonates Admitted to an Academic Neonatal Intensive Care Unit
PEDIATRICS
2008; 122 (5): E1048-E1052
Abstract
Clinical expertise and skill of pediatric housestaff improve over the academic year, and performance varies despite supervision by faculty neonatologists. It is possible that variation in clinical expertise of housestaff affects important clinical outcomes in infants in ICUs.Our goal was to test the hypothesis that there is a decrease in morbidity and mortality in infants admitted to an NICU over the course of the academic year.A retrospective analysis was conducted using data on infants with birthweight 401 to 1500 g and >or=24 weeks' gestation (n = 3445) and infants with birth weights >1500 g (n = 7840) admitted to a regional NICU from January 1991 to June 2004. All infants were cared for by pediatric and neonatal housestaff supervised by neonatologists. Analysis of mortality and morbidity (intraventricular hemorrhage grades 3-4/periventricular leukomalacia, necrotizing enterocolitis >or= Bell stage 2, and bronchopulmonary dysplasia) over time were performed by repeated measures analysis of variance and the chi(2) test.Mortality rate in the 401 to 1500 g cohort, as well as the >1500 g cohort did not decrease over time during the academic year and was similar between the first (July-December) and second (January-June) halves of the academic year. There were no differences noted over the academic year for any of the morbidities.Morbidity and mortality in infants admitted to an academic NICU did not change significantly over the academic year. These observations suggest that the quality of care of critically ill neonates is not decreased early in the academic year.
View details for DOI 10.1542/peds.2008-0412
View details for Web of Science ID 000260542500061
View details for PubMedID 18977953
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School Outcomes of Late Preterm Infants: Special Needs and Challenges for Infants Born at 32-to 36-Week Gestation
OBSTETRICAL & GYNECOLOGICAL SURVEY
2008; 63 (11): 691–92
View details for DOI 10.1097/01.ogx.0000334732.35212.87
View details for Web of Science ID 000260854500007
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Neonatal mortality among low birth weight infants during the initial months of the academic year
JOURNAL OF PERINATOLOGY
2008; 28 (10): 691-695
Abstract
Proper management of very low weight (<1500 g) infants requires specific expertise. During July and August, pediatric interns start new rotations and advance in responsibilities by postgraduate level. We test the hypothesis that low weight births in teaching hospitals exhibit increased neonatal mortality during the initial training months.Population-based cohort of 5184 very low weight and 15 232 moderately low weight infants in California from 19 regional teaching hospitals with medical training programs. Logistic regression methods controlled for both individual covariates and temporal patterns in neonatal mortality.We found no difference in neonatal mortality between very low weight infants born in teaching hospitals during July and August and those born in other months (adjusted odds ratio (AOR): 0.98, 95% confidence interval (CI), 0.78 to 1.23). Investigation of moderately low birth weight infants also indicated no increased neonatal mortality.Infants most likely to die in the neonatal period do not appear to be at elevated risk of neonatal mortality during July and August.
View details for DOI 10.1038/jp.2008.72
View details for Web of Science ID 000259675900007
View details for PubMedID 18596712
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School outcomes of late preterm infants: Special needs and challenges for infants born at 32 to 36 weeks gestation
JOURNAL OF PEDIATRICS
2008; 153 (1): 25-31
Abstract
Because limited long-term outcome data exist for infants born at 32 to 36 weeks gestation, we compared school outcomes between 32- to 33-week moderate preterm (MP), 34-36 week late preterm (LP) and full-term (FT) infants.A total of 970 preterm infants and 13 671 FT control subjects were identified from the Early Childhood Longitudinal Study-Kindergarten Cohort. Test scores, teacher evaluations, and special education enrollment from kindergarten (K) to grade 5 were compared.LP infants had lower reading scores than FT infants in K to first grade (P < .05). Adjusted risk for poor reading and math scores remained elevated in first grade (P < .05). Teacher evaluations of math skills from K to first grade and reading skills from K to fifth grade were worse for LP infants (P < .05). Adjusted odds for below average skills remained higher for math in K and for reading at all grades (P < .05). Special education participation was higher for LP infants at early grades (odds ratio, 1.4-2.1). MP infants had lower test and teacher evaluation scores than FT infants and twice the risk for special education at all grade levels.Persistent teacher concerns through grade 5 and greater special education needs among MP and LP infants suggest a need to start follow-up, anticipatory guidance, and interventions for infants born at 32 to 36 weeks gestation.
View details for DOI 10.1016/j.jpeds.2008.01.027
View details for Web of Science ID 000257154800010
View details for PubMedID 18571530
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Population trends in cesarean delivery for breech presentation in the United States, 1997-2003
Annual Meeting of the Pediatric-Academic-Societies/Society-of-Pediatric-Research
MOSBY-ELSEVIER. 2008
Abstract
The objective of the study was to determine whether cesarean delivery for breech has increased in the United States.We calculated cesarean rates for term singletons in breech/malpresentation from 1997 to 2003 using National Center for Health Statistics data. We compared rates by sociodemographic groups and state. Multivariable logistic regression models were constructed to see whether factors associated with cesarean delivery differed over time.Breech cesarean rates increased overall from 83.8% to 85.1%. There was a significant increase in rates for most sociodemographic groups. There was little to no increase for mothers younger than 30 years old. There was wide variability in rates by state, 61.6-94.2% in 1997. Higher breech incidence correlated with lower cesarean rates, suggesting potential state bias in reporting breech.In the United States, breech infants are predominantly born by cesarean. There was a small increase in this trend from 1998 to 2002. There is wide variability by state, which is not explained by sociodemographic patterns and may be due to reporting differences.
View details for DOI 10.1016/j.ajog.2007.11.059
View details for Web of Science ID 000257205200021
View details for PubMedID 18295181
View details for PubMedCentralID PMC2533265
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Trends in mode of delivery of breech presentation over a 5-year period - Response
JOURNAL OF PERINATOLOGY
2007; 27 (7): 464–65
View details for DOI 10.1038/sj.jp.7211762
View details for Web of Science ID 000247533200016
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Survival advantage associated with cesarean delivery in very low birth weight vertex neonates
OBSTETRICS AND GYNECOLOGY
2007; 109 (5): 1203-1203
View details for Web of Science ID 000246771600030
View details for PubMedID 17470608
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Implementing pay-for-performance in the neonatal intensive care unit
PEDIATRICS
2007; 119 (5): 975-982
Abstract
Pay-for-performance initiatives in medicine are proliferating rapidly. Neonatal intensive care is a likely target for these efforts because of the high cost, available databases, and relative strength of evidence for at least some measures of quality. Pay-for-performance may improve patient care but requires valid measurements of quality to ensure that financial incentives truly support superior performance. Given the existing uncertainty with respect to both the effectiveness of pay-for-performance and the state of quality measurement science, experimentation with pay-for-performance initiatives should proceed with caution and in controlled settings. In this article, we describe approaches to measuring quality and implementing pay-for-performance in the NICU setting.
View details for DOI 10.1542/peds.2006-1565
View details for Web of Science ID 000246153300014
View details for PubMedID 17473099
View details for PubMedCentralID PMC3151255
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Delivery mode by race for breech presentation in the US
JOURNAL OF PERINATOLOGY
2007; 27 (3): 147-153
Abstract
To determine if there are differential cesarean delivery rates by race and other socio-demographic factors for women with breech infants.We calculated cesarean delivery rates for 186 727 White, African American, Hispanic and Asian women delivering breech singletons with gestational age 26 to 41 weeks born in 1999 and 2000 using data from the National Center for Health Statistics. Multivariable logistic regression was used to determine differences in mode of delivery by race, adjusting for socio-demographic and medical factors.Cesarean rates for breech were >80% in most gestational age groups. In 14 of 18 groups, Whites had higher cesarean delivery rates than African Americans. However, this finding did not persist after risk adjustment. Hispanics were more likely to deliver by cesarean delivery than African Americans and Whites.Breech singleton infants are predominantly born by cesarean delivery. Although African-American women with breech presentation have lower cesarean delivery rates than Whites, this difference is not present after adjusting for socio-demographic and medical factors. Hispanics were more likely to be delivered by cesarean delivery and this difference was amplified after risk adjustment. Asians had slightly lower cesarean rates after risk adjustment, but this varied widely according to Asian subgroup.
View details for DOI 10.1038/sj.jp.7211668
View details for Web of Science ID 000244420900003
View details for PubMedID 17314983
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Mode of delivery, size for gestational age, and low apgar scores in vertex preterm infants.
B C DECKER INC. 2007: S76
View details for DOI 10.1097/00042871-200701010-00009
View details for Web of Science ID 000247692400011
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Survival rates and mode of delivery for vertex preterm neonates according to small- or appropriate-for-gestational-age status
PEDIATRICS
2006; 118 (6): E1836-E1844
Abstract
The goal was to characterize the relationship between cesarean section delivery and death for preterm vertex neonates according to intrauterine growth.Maternal and infant data from the National Center for Health Statistics for 1999 and 2000 were analyzed. Neonates with gestational ages of 26 to 36 weeks were characterized as small for gestational age (<10th percentile) or appropriate for gestational age (10th to 90th percentile). Mortality rates at 28 days and relative risks were calculated for each gestational age group according to mode of delivery.Cesarean section rates were higher for small-for-gestational-age neonates compared with appropriate-for-gestational-age neonates, most prominently from 26 weeks to 32 weeks of gestation, at which small-for-gestational-age neonates had cesarean section rates of 50% to 67%, whereas appropriate-for-gestational-age neonates had rates of 22% to 38%. Small-for-gestational-age neonates at gestational ages of <31 weeks had increased survival rates associated with cesarean section, whereas small-for-gestational-age neonates at >33 weeks and appropriate-for-gestational-age neonates overall had decreased survival rates associated with cesarean section. After adjustment for sociodemographic and medical factors, the survival advantage for small-for-gestational-age neonates at gestational ages of 26 to 30 weeks persisted.Cesarean section delivery was associated with survival for preterm small-for-gestational-age neonates but not preterm appropriate-for-gestational-age neonates. We speculate that vaginal delivery may be particularly stressful for small-for-gestational-age neonates. We found no evidence that prematurity alone is a valid indication for cesarean section for preterm appropriate-for-gestational-age neonates.
View details for DOI 10.1542/peds.2006-1327
View details for Web of Science ID 000242478900081
View details for PubMedID 17142505
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Mexican women in California: differentials in maternal morbidity between foreign and US-born populations
PAEDIATRIC AND PERINATAL EPIDEMIOLOGY
2006; 20 (6): 471-481
Abstract
In the US, the majority of deaths and serious complications of pregnancy occur during childbirth and are largely preventable. We conducted a population-based study to assess disparities in maternal health between Mexican-born and Mexican-American women residing in California and to evaluate the extent to which immigrants have better outcomes. Mothers in these two populations deliver 40% of infants in the state. We compared maternal mortality ratios and maternal morbidities during labour and delivery in the two populations using linked 1996-98 hospital discharge and birth certificate data files. For maternal morbidities, we calculated frequencies and observed and adjusted odds (OR) ratios using pre-existing maternal health, sociodemographic characteristics and quality of health care as covariates. Approximately 19% of Mexican-born women suffered a maternal disorder compared with 21% of Mexican-American women (Observed OR = 0.89, [95% CI 0.88, 0.90]). Despite their lower education and relative poverty, Mexican-born women still experienced a lower odds of any maternal morbidity than Mexican-American women, after adjusting for covariates (OR = 0.92, [95% CI 0.90, 0.93]). These findings suggest a paradox of more favourable outcomes among Mexican immigrants similar to that found with birth outcomes. Nevertheless, the positive aggregate outcome of Mexican-born women did not extend to maternal mortality, nor to certain conditions associated with suboptimal intrapartum obstetric care.
View details for Web of Science ID 000241246000003
View details for PubMedID 17052282
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Operational research on perinatal epidemiology, care and outcomes
JOURNAL OF PERINATOLOGY
2006; 26: S34-S37
Abstract
Traditionally, neonatal-perinatal medicine has been concerned with two areas of research: basic and translational. A third area, perinatal epidemiology/health outcomes research addresses those factors that impede and promote the clinical actualization of the advances developed by basic and translational research. Unfortunately, research and training in perinatal epidemiology and outcomes analysis have not kept pace with our need to understand the interplay between risk, intervention, structure and outcome. This knowledge is essential to the development of the clinical/organizational and training strategies that will enable perinatal medicine to fully realize the promise of basic and translational research.
View details for DOI 10.1038/sj.jp.7211444
View details for Web of Science ID 000241844600009
View details for PubMedID 16801967
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Obstetric complications during labor and delivery: Assessing ethnic differences in California
Conference on Expecting Something Better - A Conference to Optimize Maternal Health Care
ELSEVIER SCIENCE INC. 2006: 189–97
Abstract
We sought to compare obstetric complications during labor and delivery among white non-Latina (white), black, Asian, and Latina women who delivered in California hospitals. Many intrapartum complications are preventable.We used linked 1996-1998 state hospital discharge and birth certificate data to examine obstetric complications International Classification of Diseases, 9th Revision, Clinical Modification codes considered relevant for population surveillance. We compared the observed and adjusted odds of experiencing a complication among women of color, using white women as the reference group.One out of 5 deliveries had >or=1 complication. White (21.3%) and Asian women (21.1%) had similar prevalence rates, whereas black women (24.2%) had higher and Latina women (19.6%) had lower rates. After adjusting for covariates, the odds of experiencing >or=1 complication was lower for Asians (odds ratio [OR] = 0.95; 95% confidence interval [CI] = 0.93, 0.96) and Latinas (OR = 0.97; 95% CI = 0.96, 0.98) than whites; the odds for black women remained elevated (OR = 1.25; 95% CI = 1.23, 1.27). Asian women stood a higher risk of deliveries with major lacerations, postpartum hemorrhage, and major puerperal infections. Rates for the latter complication were higher among all women of color.The burden of morbidity is high for all women, regardless of ethnicity. Yet, compared to white women, blacks suffer more aggregate morbidities, and Asians stand a high risk of all 3 intrapartum care-sensitive conditions. Furthermore, all women of color experience disproportionate rates of puerperal infections. Collective action is needed to reduce these disparities and improve maternal health.
View details for DOI 10.1016/j.whi.2005.12.004
View details for Web of Science ID 000240051800006
View details for PubMedID 16920523
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The Asian birth outcome gap
PAEDIATRIC AND PERINATAL EPIDEMIOLOGY
2006; 20 (4): 279-289
Abstract
Asians are often considered a single group in epidemiological research. This study examines the extent of differences in maternal risks and birth outcomes for six Asian subgroups. Using linked birth/infant death certificate data from the State of California for the years 1992-97, we assessed maternal socio-economic risks and their effect on birthweight, preterm delivery (PTD), neonatal, post-neonatal and infant mortality for Filipino (87,120), Chinese (67,228), Vietnamese (45,237), Korean (23,431), Cambodian/Laotian (21,239) and Japanese (18,276) live singleton births. The analysis also included information about non-Hispanic whites and non-Hispanic blacks in order to give a sense of the magnitude of risks among Asians. Logistic regression models explored the effect of maternal risk factors and PTD on Asian subgroup differences in neonatal and post-neonatal mortality, using Japanese as the reference group. Across Asian subgroups, the differences ranged from 2.5- to 135-fold for maternal risks, and 2.2-fold for infant mortality rate. PTD was an important contributor to neonatal mortality differences. Maternal risk factors contributed to the disparities in post-neonatal mortality. Significant differences in perinatal health across Asian subgroups deserve ethnicity-specific interventions addressing PTD, teen pregnancy, maternal education, parity and access to prenatal care.
View details for Web of Science ID 000239531200002
View details for PubMedID 16879500
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Survival advantage associated with cesarean delivery in very low birth weight vertex neonates - Reply
OBSTETRICS AND GYNECOLOGY
2006; 107 (6): 1420
View details for DOI 10.1097/01.AOG.0000220535.67316.74
View details for Web of Science ID 000241296800037
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Promoting antenatal steroid use for fetal maturation: Results from the California Perinatal Quality Care Collaborative
JOURNAL OF PEDIATRICS
2006; 148 (5): 606-612
Abstract
The California Perinatal Quality Care Collaborative (CPQCC) was formed to seek perinatal care improvements by creating a confidential multi-institutional database to identify topics for quality improvement (QI). We aimed to evaluate this approach by assessing antenatal steroid administration before preterm (24 to 33 weeks of gestation) delivery. We hypothesized that mean performance would improve and the number of centers performing below the lowest quartile of the baseline year would decrease.In 1998, a statewide QI cycle targeting antenatal steroid use was announced, calling for the evaluation of the 1998 baseline data, dissemination of recommended interventions using member-developed educational materials, and presentations to California neonatologists in 1999-2000. Postintervention data were assessed for the year 2001 and publicly released in 2003. A total of 25 centers voluntarily participated in the intervention.Antenatal steroid administration rate increased from 76% of 1524 infants in 1998 to 86% of 1475 infants in 2001 (P < .001). In 2001, 23 of 25 hospitals exceeded the 1998 lower-quartile cutoff point of 69.3%.Regional collaborations represent an effective strategy for improving the quality of perinatal care.
View details for DOI 10.1016/j.jpeds.2005.12.058
View details for Web of Science ID 000237885500019
View details for PubMedID 16737870
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Sociocultural factors that affect pregnancy outcomes in two dissimilar immigrant groups in the United States
JOURNAL OF PEDIATRICS
2006; 148 (3): 341-346
Abstract
To compare perinatal risks and outcomes in foreign- and U.S.-born Asian-Indian and Mexican women.We evaluated 6.4 million U.S. vital records for births during 1995-2000 to white, foreign- and U.S.-born Asian-Indian and Mexican women. Risks and outcomes were compared by use of chi2 and logistic regression.With the exception of increased teen pregnancy and tobacco use, the favorable sociodemographic profile and increased rate of adverse outcomes seen in foreign-born Asian Indians persisted in their U.S.-born counterparts. In contrast, foreign-born Mexicans had an adverse sociodemographic profile but a low incidence of low birth weight (LBW), whereas U.S.-born Mexicans had an improved sociodemographic profile and increased LBW, prematurity and neonatal death.Perinatal outcomes deteriorate in U.S.-born Mexican women. In contrast, the paradoxically increased incidence of LBW persists in U.S.-born Asian-Indian women. Further research is needed to identify the social and biologic determinants of perinatal outcome.
View details for DOI 10.1016/j.peds.2005.11.028
View details for Web of Science ID 000236718700015
View details for PubMedID 16615964
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Prospective evaluation of postnatal steroid administration: A 1-year experience from the california perinatal quality care collaborative
PEDIATRICS
2006; 117 (3): 704-713
Abstract
Postnatal steroids (PNSs) are used frequently to prevent or treat chronic lung disease (CLD) in the very low birth weight (VLBW) infant, and their use continues despite concerns regarding an increased incidence of longer-term neurodevelopmental abnormalities in such infants. More recently, there has been a suggestion that corticosteroids may be a useful alternative therapy for hypotension in VLBW infants, but there have been no prospective reports of such use for a current cohort of VLBW infants.The California Perinatal Quality Care Collaborative (CPQCC) requested members to supplement their routine Vermont Oxford Network data collection with additional information on any VLBW infant treated during their hospital course with PNS, for any indication. The indication, actual agent used, total initial daily dose, age at treatment, type of respiratory support, mean airway pressure, fraction of inspired oxygen, and duration of first dosing were recorded.From April 2002 to March 2003 in California, 22 of the 62 CPQCC hospitals reported supplemental data, if applicable, from a cohort of 1401 VLBW infants (expanded data group [EDG]), representing 33.2% of the VLBW infants registered with the CPQCC during the 12-month period. PNSs for CLD were administered to 8.2% of all VLBW infants in 2003, 8.6% of infants in the 42 hospitals that did not submit supplemental data (routine data-set group, compared with 7.6% in EDG hospitals). Of the 1401 VLBW infants in the EDG, 19.3% received PNSs; 3.6% received PNSs for only CLD, 11.8% for only non-CLD indications, and 4.0% for both indications. At all birth weight categories, non-CLD use was significantly greater than CLD use. The most common non-CLD indication was hypotension, followed by extubation stridor, for which 36 (16.3%) infants were treated. For hypotension, medications used were hydrocortisone followed by dexamethasone. Infants treated with PNSs exclusively for hypotension had a significantly higher incidence of intraventricular hemorrhage, periventricular leukomalacia, and death when compared with infants treated only for CLD or those who did not receive PNSs.The common early use of hydrocortisone for hypotension and the high morbidity and mortality in children receiving such treatment has not been recognized previously and prospective trials evaluating the short- and long-term risk/benefit of such treatment are urgently required.
View details for DOI 10.1542/peds.2005-0796
View details for Web of Science ID 000235709000041
View details for PubMedID 16510650
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Cesarean delivery associated with survival advantage in preterm small for gestational age infants, USA, 1999-2000.
B C DECKER INC. 2006: S127
View details for Web of Science ID 000235301500290
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Survival advantage associated with cesarean delivery in very low birth vertex neonates
OBSTETRICS AND GYNECOLOGY
2006; 107 (1): 97-105
Abstract
To identify the indications for and any survival advantage associated with very low birth weight (VLBW) neonates delivered by cesarean.Maternal and infant data from the National Center for Health Statistics linked birth/death data set for 1999 to 2000 were analyzed. Maternal conditions associated with cesarean delivery were compared among birth weight groups for vertex neonates. Birth weight-specific 28-day mortality rates and relative risks were calculated with 95% confidence intervals. Multivariate logistic regression was performed to adjust for other factors that may be associated with survival.Cesarean delivery occurred frequently, more than 40% in most VLBW birth weight groups. Conditions associated with cesarean delivery in VLBW vertex neonates differed from those seen in non-VLBW vertex neonates. A survival advantage was associated with cesarean delivery in the birth weight analysis up to 1,300 g (P < .05). This decreased mortality for VLBW neonates delivered by cesarean persisted after adjusting for other factors associated with mortality.Very low birth weight vertex neonates are often born by cesarean delivery and have different maternal risk profiles from non-VLBW vertex neonates born by this route. Neonatal mortality was decreased in VLBW neonates delivered by cesarean. Further study is warranted to determine whether this may be a causal relationship or a marker of quality of care.II-2.
View details for Web of Science ID 000234287700016
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Survival advantage associated with cesarean delivery in very low birth weight vertex neonates.
Obstetrics and gynecology
2006; 107 (1): 97-105
Abstract
To identify the indications for and any survival advantage associated with very low birth weight (VLBW) neonates delivered by cesarean.Maternal and infant data from the National Center for Health Statistics linked birth/death data set for 1999 to 2000 were analyzed. Maternal conditions associated with cesarean delivery were compared among birth weight groups for vertex neonates. Birth weight-specific 28-day mortality rates and relative risks were calculated with 95% confidence intervals. Multivariate logistic regression was performed to adjust for other factors that may be associated with survival.Cesarean delivery occurred frequently, more than 40% in most VLBW birth weight groups. Conditions associated with cesarean delivery in VLBW vertex neonates differed from those seen in non-VLBW vertex neonates. A survival advantage was associated with cesarean delivery in the birth weight analysis up to 1,300 g (P < .05). This decreased mortality for VLBW neonates delivered by cesarean persisted after adjusting for other factors associated with mortality.Very low birth weight vertex neonates are often born by cesarean delivery and have different maternal risk profiles from non-VLBW vertex neonates born by this route. Neonatal mortality was decreased in VLBW neonates delivered by cesarean. Further study is warranted to determine whether this may be a causal relationship or a marker of quality of care.II-2.
View details for PubMedID 16394046
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Social disparities in maternal morbidity during labor and delivery between Mexican-born and US-born white Californians, 1996-1998
AMERICAN JOURNAL OF PUBLIC HEALTH
2005; 95 (12): 2218-2224
Abstract
To assess maternal health disparities, we compared maternal morbidities during labor and delivery among Mexican-born and US-born White, non-Latina women residing in California.This population-based study used linked hospital discharge and birth certificate data for 1996-1998 (862,723 deliveries). We calculated the frequency, and observed and adjusted odds ratios for obstetric complications. Covariates included maternal age, parity, education, prenatal care initiation and payment source, and hospital quality of care.Approximately 1 in 5 deliveries resulted in a obstetric complication. After control for covariates, Mexican-born women were significantly less likely to have 1 or more maternal morbidities than White, non-Latina women but more likely to have complications that reflect the quality of intrapartum care.Maternal morbidities during labor and delivery are a substantial burden for women in California. The favorable overall outcome of Mexican-born women over US-born White, non-Latinas is surprising given their lower educational attainment, relative poverty, and greater barriers to health care access. The favorable outcomes obscure vulnerabilities in those complications that are sensitive to the quality of intrapartum care.
View details for DOI 10.2105/AJPH.2004.051441
View details for Web of Science ID 000233656000025
View details for PubMedID 16257944
View details for PubMedCentralID PMC1449510
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Time of birth and the risk of neonatal death
OBSTETRICS AND GYNECOLOGY
2005; 106 (2): 352-358
Abstract
To assess whether mortality is increased in the United States in infants born at night, we compared case-mix adjusted neonatal mortality for low- and high-risk infants born during the daytime (7 am to 6 pm), early night (7 pm to 12 am), and late night (1 am to 6 am).California linked birth-death certificate data on 3,363,157 infants, weighing more than 500 g and born without lethal congenital anomalies in 1992-1999, were analyzed. Logistic regression, adjusting for birth weight, gender, prenatal care initiation, maternal hypertension, eclampsia, diabetes, and placental abruption/previa, was used to estimate the relationship between neonatal mortality and time of birth.The overall neonatal mortality was 2.08 deaths per 1,000 live births. Neonatal mortality was 1.88 for daytime births, increasing to 2.37 for early night and 2.31 for late night births. After adjusting for case mix, early night births had a 12% increase and late night births a 16% increase in the odds of neonatal death, an excess that accounts for 9.6% of all neonatal deaths. Mortality was increased for night births that were less than 1,500 g or more than 1,500 g, singletons or multiples, and those delivered vaginally or by cesarean. The increased risk was identified in hospitals that provide intermediate, community, and regional neonatal intensive care, but not in hospitals that provide primary care.Identifying the causal factors and reducing the increased burden of mortality for infants born at night should be a major priority for perinatal medicine.
View details for Web of Science ID 000230717800022
View details for PubMedID 16055587
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Fetal death sex ratios: a test of the economic stress hypothesis
INTERNATIONAL JOURNAL OF EPIDEMIOLOGY
2005; 34 (4): 944-948
Abstract
The ratio of male to female live births (i.e. the sex ratio) reportedly falls when populations suffer rare and extreme ambient stressors such as the collapse of national economies. This association has been attributed to the death of male fetuses and to reduced conception of males. We assess the validity of the first of these mechanisms by testing the hypothesis that the fetal death sex ratio varies positively over time with the unemployment rate. Using the unemployment rate also allows us to determine if ambient economic stressors less extreme than collapsing national economies affect the fetal death sex ratio.We test our hypotheses by applying time-series methods to monthly counts of fetal deaths and the unemployment rate from the state of California beginning January 1989 and ending December 2001. The methods control for trends, seasonal cycles, and other forms of autocorrelation that could induce spurious associations.Results support the fetal death mechanism in that male fetal deaths increased above the values expected from female deaths and from history in months in which the unemployment rate also increased over its expected value.Our findings suggest that ambient stressors as common as increasing unemployment elevate the risk of fetal death among males. We discuss the social, economic, and health costs borne by parents and communities afflicted with these fetal deaths.
View details for DOI 10.1093/ije/dyi081
View details for Web of Science ID 000231360300042
View details for PubMedID 15833788
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Sex ratios in California following the terrorist attacks of September 11, 2001
HUMAN REPRODUCTION
2005; 20 (5): 1221-1227
Abstract
Natural and man-made disasters as well as declining economies appear to coincide with reduced odds of male live births among humans (i.e. lower secondary sex ratio). This association has been attributed to excess death of males in gestation and to reduced conception of males. We attempt to empirically discriminate between these two attributions by testing the hypotheses that the attacks of September 11, 2001 were followed in California first by higher fetal death sex ratios and later by lower sex ratios among very low weight births and total live births.We apply interrupted time-series methods to the fetal death, very low birth weight, and secondary sex ratios. The methods control for trends, seasonal cycles, and other forms of autocorrelation that could induce spurious associations.Findings support the excess death explanation in that the fetal death sex ratio reached its highest level in the 6 year test period in October and November of 2001, while the very low weight birth sex ratio dropped to its lowest level in 14 years in December of 2001. The secondary sex ratio exhibited its second lowest value in 14 years in December of 2001. No support was found for the reduced conception explanation in that the sex ratio did not differ from expected values 9, 10 or 11 months after the attacks.We infer support for the excess death explanation at the expense of the reduced conception explanation. We also describe the implications of our findings for public health planning.
View details for DOI 10.1093/humrep/deh763
View details for Web of Science ID 000228636600014
View details for PubMedID 15734763
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Cesarean delivery rates and neonatal morbidity in a low-risk population
OBSTETRICS AND GYNECOLOGY
2004; 104 (1): 11-19
Abstract
To estimate the relationship between case-mix adjusted cesarean delivery rates and neonatal morbidity and mortality in infants born to low-risk mothers.This retrospective cohort study used vital and administrative data for 748,604 California singletons born without congenital abnormalities in 1998-2000. A total of 282 institutions was classified as average-, low-, or high-cesarean delivery hospitals based on their cesarean delivery rate for mothers without a previous cesarean delivery, in labor at term, with no evidence of maternal, fetal, or placental complications. Neonatal mortality, diagnoses, and therapeutic interventions determined by International Classification of Diseases, 9th Revision, Clinical Modification codes, and neonatal length of stay were compared across these hospital groupings.Compared with average-cesarean delivery-rate hospitals, infants born to low-risk mothers at low-cesarean delivery hospitals had increased fetal hemorrhage, birth asphyxia, meconium aspiration syndrome, feeding problems, and electrolyte abnormalities (P <.02). Infused medication, pressors, transfusion for shock, mechanical ventilation, and length of stay were also increased (P <.001). This suggests that some infants born in low-cesarean delivery hospitals might have benefited from cesarean delivery. Infants delivered at high-cesarean delivery hospitals demonstrated increased fetal hemorrhage, asphyxia, birth trauma, electrolyte abnormalities, and use of mechanical ventilation (P <.001), suggesting that high cesarean delivery rates themselves are not protective.Neonatal morbidity is increased in infants born to low-risk women who deliver at both low- and high-cesarean delivery-rate hospitals. The quality of perinatal care should be assessed in these outlier hospitals.III
View details for DOI 10.1097/01.AOG.0000127035.64602.97
View details for PubMedID 15228995
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The effects of acculturation on high and low risk immigrant populations
INT PEDIATRIC RESEARCH FOUNDATION, INC. 2004: 376A
View details for Web of Science ID 000220591102203
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Time of birth and the risk of neonatal death
INT PEDIATRIC RESEARCH FOUNDATION, INC. 2004: 371A
View details for Web of Science ID 000220591102177
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Risk of neonatal death on weekends vs weekdays - Reply
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION
2003; 290 (16): 2125–26
View details for Web of Science ID 000186036700018
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Neonatal mortality in weekend vs weekday births
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION
2003; 289 (22): 2958-2962
Abstract
Increases in neonatal mortality for infants born on the weekend were last noted several decades ago. Although the current health care environment has raised concern about the adequacy of weekend care, there have been no contemporary evaluations of daily patterns of births, obstetric intervention, and case mix-adjusted neonatal mortality.To compare the neonatal mortality of infants born on weekdays and weekends.Case series of 1 615 041 live births (weight >or=500 g) in California between 1995-1997 to determine patterns of births, cesarean deliveries, and neonatal deaths. Analyses were stratified by birth weight and delivery method. To assess the role of weekend differences in case mix, observed and birth weight-adjusted odds ratios (ORs) for increased weekend mortality were estimated using logistic regression.Birth weight-adjusted neonatal mortality.There was a 17.5% decrease in births on weekends, accompanied by a decrease in the proportion of cesarean deliveries from 22% on weekdays to 16% on weekends. Weekend decreases in births were least pronounced in smaller infants, resulting in a weekend concentration of high-mortality, very low-birth-weight (<1500 g) births. Observed neonatal mortality increased from 2.80 per 1000 weekday births to 3.12 per 1000 weekend births (OR, 1.12; 95% confidence interval [CI], 1.05-1.19; P =.001) for all births, and from 4.94 to 6.85 (OR, 1.39; 95% CI, 1.25-1.55; P<.001) for cesarean deliveries. After adjusting for birth weight, the increased odds of death for infants born on the weekend were no longer significant.The provision of optimal care regardless of the day of week is an important goal for perinatal medicine. Comparing the neonatal mortality of infants born on weekdays and weekends provides a straightforward assessment of this goal. After controlling for birth weight, we found no evidence that the quality of perinatal care in California was compromised during the weekend.
View details for Web of Science ID 000183403400018
View details for PubMedID 12799403
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Perinatal outcomes in two dissimilar immigrant populations in the United States: A dual epidemiologic paradox
PEDIATRICS
2003; 111 (6): E676-E682
Abstract
Previous studies have addressed perinatal outcomes in Hispanic, black, and white non-Hispanic women and demonstrated that although foreign-born Mexican American women have many demographic and socioeconomic risk factors, their rates of low birth weight (LBW) infants and infant mortality are similar to those of white women. This phenomenon has been termed an epidemiologic paradox. There have been no population-based studies on women of Asian Indian origin, a relatively new, highly educated, and affluent immigrant group that has been reported to have a high rate of LBW infants. The objective of this study was to define the sociodemographic risk profile and perinatal outcomes in women of Asian Indian birth and to compare these outcomes to foreign-born Mexican American and US-born black and white women.The vital records for self-reported foreign-born Asian Indian (0.8%) and Mexican women (26.7%) and US-born black (31.2%) and white women (31.2%) were extracted from California's 1 622 324 births, 1995-1997. Sociodemographic risk profiles; the percentage of LBW, very low birth weight (VLBW), prematurity, and intrauterine growth retardation (less than third percentile); and percentage of fetal, neonatal, and postneonatal death rates were compared. Logistic models were used to estimate the importance of selected sociodemographic and medical factors to the prediction of LBW infants in each racial/ethnic group.When compared with whites, US-born blacks and foreign-born Mexican mothers were at increased risk for adverse perinatal outcomes on the basis of higher levels of inadequate prenatal care, teen births, Medi-Cal paid delivery, and lower levels of maternal and paternal education. Foreign-born Asian Indian mothers had good prenatal care, were rarely teenagers, had dramatically higher levels of both maternal and paternal education, and had the lowest percentage of deliveries paid for by Medi-Cal. Black infants had the highest rates of prematurity; intrauterine growth retardation; LBW; and fetal, neonatal, and postneonatal mortality. Paradoxically, despite their high-risk profile, Mexicans did not have elevated levels of LBW or neonatal mortality. Conversely, Asian Indian infants, although seemingly of low sociodemographic risk, had high levels of LBW, growth retardation, and fetal mortality. Logistic regression analysis of independent risk factors for giving birth to an LBW infant showed higher maternal education, early access to prenatal care, and having private insurance to be protective in white non-Hispanic and black but not in Asian Indian and Mexican-born women.Despite their high socioeconomic status and early entry into care, foreign-born Asian Indian women have a paradoxically higher incidence of LBW infants and fetal deaths when compared with US-born whites. Factors that protect from giving birth to an LBW infant in white women were not protective among Asian Indian women. Current knowledge regarding factors that confer a perinatal advantage or disadvantage is unable to explain this new epidemiologic paradox. These findings highlight the need for additional research into both epidemiologic and biological risk factors that determine perinatal outcomes.
View details for Web of Science ID 000183696000007
View details for PubMedID 12777585
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Perinatal outcomes in two dissimilar immigrant populations in the U.S: A dual epidemiologic paradox
INT PEDIATRIC RESEARCH FOUNDATION, INC. 2003: 382A
View details for Web of Science ID 000181897902162
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Expansion of community-based perinatal care in California.
Journal of perinatology
2002; 22 (8): 630-640
Abstract
In California, hospitals with Community Neonatal Intensive Care Units (NICUs) increased from 17 in 1990 to 52 in 1997. The purpose of this study was to investigate the effects of their growth on level-specific distribution of births, acuity, and neonatal mortality.A total of 4,563,900 infants born from 1990 to 1997 were analyzed by levels of care. We examined shifts in birth location and acuity. Neonatal mortality for singleton very-low-birth-weight (VLBW) infants without congenital abnormalities was used to assess differences in level-specific survival.Live births at hospitals with Community NICUs increased from 8.6% to 28.6%, and VLBW births increased from 11.7% to 37.4%. Births and VLBW births at Regional NICUs decreased, whereas acuity was unchanged. There were no differences in neonatal mortality of VLBW infants born at Community or Regional NICU hospitals. Mortality for VLBW births at other levels of care was significantly higher.The rapid growth of monitored Community NICUs supported by a regionalized system of neonatal transport represents an evolving face of regionalization. Survival of VLBW births was similar at Community and Regional hospitals and higher than in other birth settings. Reducing VLBW births at Primary Care and Intermediate NICU hospitals continues to be an important goal of regionalization. doi:10.1038/sj.jp.7210824
View details for PubMedID 12478445
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Incomplete birth certificates: A risk marker for infant mortality
AMERICAN JOURNAL OF PUBLIC HEALTH
2002; 92 (1): 79-81
Abstract
This study assessed the relationship between incomplete birth certificates and infant mortality.Birth certificates from California (n = 538 945) were assessed in regard to underreporting of 13 predictors of perinatal outcomes and mortality.Of the birth certificates studied, 7.25% were incomplete. Underreporting was most common in the case of women at high risk for poor perinatal outcomes and infants dying within the first day. Increasing numbers of unreported items were shown to be associated with corresponding increases in neonatal and postneonatal mortality rates.Incomplete birth certificates provide an important marker for identifying high-risk women and vulnerable infants. Because data "cleaning" will result in the removal of mothers and infants at highest risk, birth certificate analyses should include incomplete records.
View details for Web of Science ID 000172875600024
View details for PubMedID 11772766
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Newborn discharge timing and readmissions: California, 1992-1995
PEDIATRICS
2000; 106 (1): 31-39
Abstract
Hospital stays for newborns and their mothers after uncomplicated vaginal delivery have decreased from an average of 4 days in 1970 to 1.1 days in 1995. Despite the lack of population-based research on the quality-of-care implications of this trend, federal legislation passed in 1996 mandated coverage for 48-hour hospital stays after uncomplicated vaginal delivery.To assess the impact of very early discharge (defined as discharge on the day of birth) on the risk of infant readmission during the neonatal period in a California healthy newborn population.Retrospective cohort study, based on a linked dataset consisting of the birth certificate, newborn, and maternal hospitalization record, and linked infant readmission records for all healthy, vaginally delivered, and routinely discharged California newborns from 1992 to 1995.Very early discharge and infant readmission during the first 28 days of life.The percentage of infants discharged very early or early (after a 1-night stay) increased from 71% in 1992 to 85% in 1995. The percentage of infants discharged very early increased from 5.0% in 1992 to 5.7% in 1993 and 7.0% in 1994, then decreased to 6.7% in 1995. Characteristics that have been previously associated with suboptimal pregnancy outcomes were found to decrease the likelihood of very early discharge, eg, maternal complications, primiparity, and Hispanic, African American, South East Asian, or other Asian race/ethnicity. The rate of readmission in the neonatal period initially decreased from 27.6 infants per 1000 in 1992 to 25.67 infants per 1000 in 1994, then increased to 30.2 infants per 1000 in 1995. For infants discharged early, no statistically significant increase in the risk of readmission was observed, compared with infants discharged after a 2+-night stay. The adjusted odds ratio (OR) for readmission was statistically significantly higher for infants who were discharged very early, compared with infants discharged early (OR: 1.27), first order births (OR: 1.21), infants born to mothers who experienced complications (OR: 1.11), infants with Medicaid insurance (OR: 1.23), and infants born to mothers who received adequate plus prenatal care (OR: 1.15). The risk was statistically significantly lower for female infants (OR: 0.75). The proportion of infants rehospitalized for dehydration and low-risk infections over the 4 study years combined was statistically significantly higher in infants discharged very early (4.37 per thousand and 10.30 per thousand, respectively), compared with infants discharged early (3.59 per thousand and 8.16 per thousand, respectively) or after a 2+-night stay (2.91 per thousand and 7.95 per thousand, respectively). The proportion of infants rehospitalized for dehydration increased statistically significantly from 2.89 per thousand in 1992 to 4.52 per thousand in 1995.One-night stays with adequate antenatal and postnatal care outside the hospital do not increase the risk of readmission for healthy, vaginally delivered infants born in California. However, the decision to discharge infants on the day of birth should be applied conservatively because of the increased risk of infant readmission associated with very early discharge.
View details for Web of Science ID 000087990400021
View details for PubMedID 10878146
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Mortality and time to death in very low birth weight infants: California, 1987 and 1993
PEDIATRICS
2000; 105 (3)
Abstract
Recent advances in perinatal technology have dramatically increased the survival of very low birth weight (VLBW) infants (<1500 g). The possibility that these advances may also prolong the time to death and increase pain and suffering has been of concern, but there have been no population-based evaluations of this issue.Infant, neonatal, and postneonatal mortality rates and time to death for infants 500 to 749 g, 750 to 999 g, 1000 to 1499 g, and all VLBW infants born during 1987 were compared with those outcomes for infants born in 1993 using statewide California linked birth/death cohort files. To assess the effects of improved survival and changes in time until death, we calculated the total days of life preceding an infant death per 1000 live born infants (TDD).VLBW infants comprised.96% of California's live births in 1987 and.92% of those in 1993. Between 1987 and 1993, VLBW infant mortality rate decreased 28.4% (from 290.7 to 208.3 per 1000 live born VLBW infants), VLBW neonatal mortality rate decreased 30. 3% (from 244.5 to 170.4), and VLBW postneonatal mortality rate decreased 25.3% (from 61.2 to 45.7 per 1000 VLBW alive at 28 days; P <.05 for each rate). Infant mortality rates decreased by 18.8% (718. 1 to 583.0 per 1000) for infants 500 to 749 g, 43.3% (375.1 to 202. 6) for infants 750 to 999 g, and 40.1% (127.9 to 76.7) for infants 1000 to 1449 g (P <.05 for each group). Neonatal mortality and postneonatal mortality rates also decreased in all 3 VLBW subgroups. These reductions in mortality rates were not accompanied by a significant difference in the distribution of times to death or a significant increase in the average time to death for all VLBW infants (22.0 vs 23.6 days) or for those with birth weights of 500 to 749 g (12.7 vs 71.5 days). Reduced mortality in larger infants was accompanied by an increase in the average time to death, from 24. 3 to 32.5 days in infants 750 to 999 g and from 32.3 to 47.0 days in infants 1000 to 1449 g. TDD decreased from 6410 to 4908 days for all VLBW infants. TDD was also reduced 26.4% (2401 days), 24.3% (2115 days), and 22.5% (1043 days) for the 3 VLBW birth weight groups.Both mortality rate and timing of death are important when assessing the impact of advances in perinatal technology. Although the average time to death was significantly increased in VLBW infants weighing >750 g, between 1987 and 1993, advances in perinatal technology dramatically decreased VLBW mortality. In the State of California in 1993, this resulted in 452 fewer VLBW deaths and 8233 fewer days preceding a VLBW death than expected.
View details for Web of Science ID 000085681100008
View details for PubMedID 10699139
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Risk factors for early-onset group B streptococcal sepsis: Estimation of odds ratios by critical literature review
PEDIATRICS
1999; 103 (6)
Abstract
To identify and to establish the prevalence of ORs factors associated with increased risk for early-onset group B streptococcal (EOGBS) infection in neonates. streptococcal (EOGBS) infection in neonates.Literature review and reanalysis of published data.Risk factors for EOGBS infection include group B streptococcal (GBS)-positive vaginal culture at delivery (OR: 204), GBS-positive rectovaginal culture at 28 (OR: 9.64) or 36 weeks gestation (OR: 26. 7), vaginal Strep B OIA test positive at delivery (OR: 15.4), birth weight = 2500 g (OR: 7.37), gestation <37 weeks (OR: 4.83), gestation <28 weeks (OR: 21.7), prolonged rupture of membranes (PROM) >18 hours (OR: 7.28), intrapartum fever >37.5 degrees C (OR: 4.05), intrapartum fever, PROM, or prematurity (OR: 9.74), intrapartum fever or PROM at term (OR: 11.5), chorioamnionitis (OR: 6.43). Chorioamnionitis is reported in most (88%) cases in which neonatal infection occurred despite intrapartum maternal antibiotic therapy. ORs could not be estimated for maternal GBS bacteriuria during pregnancy, with preterm premature rupture of membranes, or with a sibling or twin with invasive GBS disease, but these findings seem to be associated with a very high risk. Multiple gestation is not an independent risk factor for GBS infection.h Mothers with GBS bacteriuria during pregnancy, with another child with GBS disease, or with chorioamnionitis should receive empirical intrapartum antibiotic treatment. Their infants should have complete diagnostic evaluations and receive empirical treatment until infection is excluded by observation and negative cultures because of their particularly high risk for EOGBS infection. Either screening with cultures at 28 weeks gestation or identification of clinical risk factors, ie, PROM, intrapartum fever, or prematurity, may identify parturients whose infants include 65% of those with EOGBS infection. Intrapartum screening using the Strep B OIA rapid test identifies more at-risk infants (75%) than any other method. These risk identifiers may permit judicious selection of patients for prophylactic interventions.
View details for Web of Science ID 000080613400006
View details for PubMedID 10353974
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Antimicrobial prevention of early-onset group B streptococcal sepsis: Estimates of risk reduction based on a critical literature review
PEDIATRICS
1999; 103 (6)
Abstract
To identify interventions that reduce the attack rate for early-onset group B streptococcal (GBS) sepsis in neonates.Literature review and reanalysis of published data.The rate of early-onset GBS sepsis in high-risk neonates can be reduced by administration of antibiotics. Treatment during pregnancy (antepartum prophylaxis) fails to reduce maternal GBS colonization at delivery. With the administration of intravenous ampicillin, the risk of early-onset infection in infants born to women with preterm premature rupture of membranes is reduced by 56% and the risk of GBS infection is reduced by 36%; addition of gentamicin may increase the efficacy of ampicillin. Treatment of women with chorioamnionitis with ampicillin and gentamicin during labor reduces the likelihood of neonatal sepsis by 82% and reduces the likelihood of GBS infection by 86%. Universal administration of penicillin to neonates shortly after birth (postpartum prophylaxis) reduces the early-onset GBS attack rate by 68% but is associated with a 40% increase in overall mortality and therefore is contraindicated. Intrapartum prophylaxis, alone or combined with postnatal prophylaxis for the infants, reduces the early-onset GBS attack rate by 80% or 95%, respectively.Women with chorioamnionitis or premature rupture of membranes and their infants should be treated with intravenous ampicillin and gentamicin. Intrapartum antimicrobial prophylaxis may be appropriate for other women whose infants are at increased but less extreme risk, and supplemental postpartum prophylaxis may be indicated for some of their infants. Selection of appropriate candidates and prophylaxis strategies requires careful consideration of costs and benefits for each patient. group B streptococcus, neonatal sepsis, early-onset sepsis, prevention, prophylaxis.
View details for Web of Science ID 000080613400007
View details for PubMedID 10353975
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Preventing early-onset group B streptococcal sepsis: Strategy development using decision analysis
PEDIATRICS
1999; 103 (6)
Abstract
To evaluate recommended strategies for prevention of early-onset group B streptococcal infections (EOGBS) with reference to strategies optimized using decision analysis.The EOGBS attack rate, prevalence and odds ratios for risk factors, and expected effects of prophylaxis were estimated from published data. Population subgroups were defined by gestational age, presence or absence of intrapartum fever or prolonged rupture of membranes, and presence or absence of maternal group B streptococcus (GBS) colonization. The EOGBS prevalence in each subgroup was estimated using decision analysis. The number of EOGBS cases prevented by an intervention was estimated as the product of the expected reduction in attack rate and the number of expected cases in each group selected for treatment. For each strategy, the number of residual EOGBS cases, cost, and numbers of treated patients were calculated based on the composition of the prophylaxis group. Integrated obstetrical-neonatal strategies for EOGBS prevention were developed by targeting the subgroups expected to benefit most from intervention.Reductions in EOGBS rates predicted by this decision analysis were smaller than those previously estimated for the strategies proposed by the American Academy of Pediatrics in 1992 (32.9% vs 90.7%), the American College of Obstetricians and Gynecologists in 1992 (53.8% vs 88.8%), and the Centers for Disease Control and Prevention in 1996 (75.1% vs 86.0%). Strategies based on screening for GBS colonization with rectovaginal cultures at 36 weeks or on use of a rapid test to screen for GBS colonization on presentation for delivery, combining intrapartum prophylaxis for selected mothers and postpartum prophylaxis for some of their infants, would require treatment of fewer patients and prevent more cases (78.4% or 80.1%, respectively) at lower cost.No strategy can prevent all EOGBS cases, but the attack rate can be reduced at a cost <$12 000 per prevented case. Supplementing intrapartum prophylaxis with postpartum ampicillin in a few infants is more effective and less costly than providing intrapartum prophylaxis for more mothers. Better intrapartum screening tests offer the greatest promise for increasing efficacy. Integrated obstetrical and neonatal regimens appropriate to the population served should be adopted by each obstetrical service. Surveillance of costs, complications, and benefits will be essential to guide continued iterative improvement of these strategies.
View details for Web of Science ID 000080613400005
View details for PubMedID 10353973
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Socioeconomic status, neighborhood social conditions, and neural tube defects
AMERICAN JOURNAL OF PUBLIC HEALTH
1998; 88 (11): 1674-1680
Abstract
This study evaluated the contributions of lower socioeconomic status (SES) and neighborhood socioeconomic characteristics to neural tube defect etiology. The influence of additional factors, including periconceptional multivitamin use and race/ethnicity, was also explored.Data derived from a case-control study of California pregnancies from 1989 to 1991. Mothers of 538 (87.8% of eligible) case infants/fetuses with neural tube defects and mothers of 539 (88.2%) nonmalformed infants were interviewed about their SES. Reported addresses were linked to 1990 US census information to characterize neighborhoods.Twofold elevated risks were observed for several SES indicators. Risks were somewhat confounded by vitamin use, race/ethnicity, age, body mass index, and fever but remained elevated after adjustment. A risk gradient was seen with increasing number of lower SES indicators. Women with 1 to 3 and 4 to 6 lower SES indicators had adjusted odds ratios of 1.6 (1.1-2.2) and 3.2 (1.9-5.4), respectively, compared with women with no lower SES indicators.Both lower SES and residence in a SES-lower neighborhood increased the risk of an neural tube defect-affected pregnancy, with risks increasing across a gradient of SES indicators.
View details for Web of Science ID 000076694100014
View details for PubMedID 9807535
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Prevention of early-onset group B streptococcal disease: Optimizing strategies using risk-allocation decision analysis
AMER ACAD PEDIATRICS. 1997: 493
View details for Web of Science ID A1997XU27800146
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Racial disparities in outcomes of military and civilian births in California
ARCHIVES OF PEDIATRICS & ADOLESCENT MEDICINE
1996; 150 (10): 1062-1067
Abstract
To examine racial disparities in prenatal care utilization, birth weight, and fetal and neonatal mortality in a population for whom financial barriers to health care services are minimal.Using linked birth, fetal death, and infant death certificate files, we examined prenatal care utilization, birth weight distribution, and fetal and neonatal mortality rates for all white and black births occurring in military hospitals in California from January 1, 1981, to December 31, 1985. These patterns were compared with the experience of their civilian counterparts during the same time period.Black mothers had higher percentages of births occurring in teenaged and unmarried mothers than did white mothers in military and civilian populations. First-trimester prenatal care initiation was lower for blacks in the military (relative risk, 0.79; 95% confidence interval, 0.75-0.82) and civilian (relative risk, 0.51; 95% confidence interval, 0.50-0.52) populations. However, the scale of the disparity in prenatal care utilization was significantly smaller (P < .001) in the military group. Rates of low birth weight and fetal and neonatal mortality among blacks were elevated in the military and civilian groups. However, the racial disparity in low birth weight was significantly smaller in the military group (P < .01 and P < .001, respectively).In populations with decreased financial barriers to health care, racial disparities in prenatal care use and low birth weight were reduced. However, the persistence of significant disparities suggests that more comprehensive strategies will be required to ensure equity in birth and neonatal outcome.
View details for Web of Science ID A1996VM05900010
View details for PubMedID 8859139
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GENERATIONAL-DIFFERENCES IN PERINATAL HEALTH AMONG THE MEXICAN-AMERICAN POPULATION - FINDINGS FROM HHANES 1982-84
AMERICAN JOURNAL OF PUBLIC HEALTH
1990; 80: 61-65
Abstract
Data from the Hispanic Health and Nutrition Examination Survey (HHANES) were used to examine a profile of social, medical, and behavioral characteristics associated with low birth-weight (LBW) and miscarriages in first and second generation Hispanics of Mexican descent. The percentage of LBW was 5.3 and of miscarriages was 12.7. LBW rates were higher for second generation primipara and multipara compared with first generation women. Using multivariate logistic regression techniques and adjusting for complex design effects, generation was found to be a significant predictor of LBW but not of miscarriages. The findings support existing evidence that a Mexican cultural orientation protects first generation. Mexico-born women against a risk for LBW. However, the findings do not show significant effects of generation on miscarriages, suggesting that cultural effects are not consistent for all pregnancy outcomes. Furthermore, we suggest that the higher rates of LBW in second generation women are not due to a higher rate of miscarriages as has been hypothesized.
View details for Web of Science ID A1990EL50100011
View details for PubMedID 9187584