Kathryn Macia is a postdoctoral fellow in VA's Advanced Fellowship Program in Mental Illness Research and Treatment at the National Center for PTSD, Dissemination & Training Division, VA Palo Alto Health Care System and the Department of Psychiatry and Behavioral Sciences, Stanford University. Her research interests focus on traumatic stress, substance use, emotion regulation, social support, interpersonal functioning, and homelessness among veterans and vulnerable populations, as well as advanced statistical methods.
Ph.D., Palo Alto University, Clinical Psychology (2019)
B.S., College of Charleston, Psychology; minor: Mathematics (2010)
Craig Rosen, Postdoctoral Faculty Sponsor
PTSD networks of veterans with combat versus non-combat types of index trauma
JOURNAL OF AFFECTIVE DISORDERS
2020; 277: 559–67
Network analysis has become popular among PTSD researchers for studying causal structure or interrelationships among symptoms. However, some have noted that results do not seem to be consistent across studies. Preliminary evidence suggests that trauma type may be one source of variability.The current study sought to examine the PTSD networks of veterans with combat versus non-combat index trauma. Participants included 944 veterans who completed the PTSD Checklist for DSM-5 at intake at two VA PTSD clinics.There were many similarities between the combat and non-combat trauma networks, including strong edges between symptoms that were theoretically related or similar (e.g., avoidance) and negative emotion being a highly central symptom. However, correlations of edge weights (0.509) and node centrality (0.418) across networks suggested moderate correspondence, and there appeared to be some differences associated with certain symptoms. Detachment was relatively more central and the connections of negative emotion with blame and lack of positive emotion with reckless behavior were stronger for veterans with combat-related index trauma.The data were cross-sectional, which limits the ability to infer directional relationships between symptoms. In addition, the sample was likely not large enough to directly test for differences between networks via network comparison tests.Although there were many similarities, results also suggested some variability in PTSD networks associated with combat versus non-combat index trauma that could have implications for conceptualizing and treating PTSD among veterans.
View details for DOI 10.1016/j.jad.2020.08.027
View details for Web of Science ID 000577467600002
View details for PubMedID 32891062
Cumulative Trauma Exposure and Chronic Homelessness Among Veterans: The Roles of Responses to Intrusions and Emotion Regulation.
Journal of traumatic stress
2020; 33 (6): 1017–28
Veterans with mental health problems and a history of interpersonal and military trauma exposure are at increased risk for chronic homelessness. Although studies have examined posttraumatic stress disorder (PTSD) as a predictor of homelessness, there is limited understanding of specific mechanisms related to cumulative trauma exposure. We sought to elucidate how cumulative interpersonal and military trauma exposure may be linked to homelessness chronicity by examining the role of factors that influence trauma recovery and functional impairment. Specifically, we examined the indirect association of cumulative trauma exposure with homelessness chronicity through distress and responses to trauma-related intrusions and emotion regulation problems in a sample of 239 veterans in community-based homeless programs. Participants completed measures of trauma exposure, responses to intrusions, intrusion distress, difficulties with emotion regulation, and duration and episodes of homelessness. Structural equation modeling was used to test a serial indirect effect model in which cumulative trauma exposure was indirectly associated with homelessness chronicity through distress from and responses to intrusions as well as emotion regulation problems. The results supported the hypothesized sequential indirect effect for episodes of homelessness, indirect effect odds ratio (IE ORs) = 1.12-1.13, but not for current episode duration, IE OR = 1.05. Overall, the present findings elucidate specific trauma-related factors that may be particularly relevant to episodic patterns of homelessness and interfere with efforts to remain housed. These findings represent an important step toward shaping policy and program development to better meet mental health care needs and improve housing outcomes among homeless veterans.
View details for DOI 10.1002/jts.22569
View details for PubMedID 32662141
The Impact of Item Misspecification and Dichotomization on Class and Parameter Recovery in LCA of Count Data
MULTIVARIATE BEHAVIORAL RESEARCH
2019; 54 (1): 113–45
Mixture analysis of count data has become increasingly popular among researchers of substance use, behavioral analysis, and program evaluation. However, this increase in popularity seems to have occurred along with adoption of some conventions in model specification based on arbitrary heuristics that may impact the validity of results. Findings from a systematic review of recent drug and alcohol publications suggested count variables are often dichotomized or misspecified as continuous normal indicators in mixture analysis. Prior research suggests that misspecifying skewed distributions of continuous indicators in mixture analysis introduces bias, though the consequences of this practice when applied to count indicators has not been studied. The present work describes results from a simulation study examining bias in mixture recovery when count indicators are dichotomized (median split; presence vs. absence), ordinalized, or the distribution is misspecified (continuous normal; incorrect count distribution). All distributional misspecifications and methods of categorizing resulted in greater bias in parameter estimates and recovery of class membership relative to specifying the true distribution, though dichotomization appeared to improve class enumeration accuracy relative to all other specifications. Overall, results demonstrate the importance of accurately modeling count indicators in mixture analysis, as misspecification and categorizing data can distort study outcomes.
View details for DOI 10.1080/00273171.2018.1499499
View details for Web of Science ID 000467758900008
View details for PubMedID 30595072
Personality change during substance use disorder treatment is associated with improvements in abstinence self-efficacy post-treatment among U.S. military veterans.
Journal of substance abuse treatment
2021; 120: 108187
Prior research suggests that personality traits change during substance use disorder (SUD) treatment. However, the extent to which changes in traits during SUD treatment are associated with subsequent improvements in treatment outcomes remains untested. Among U.S. military veterans (n=200) enrolled in SUD residential treatment, we examined whether changes in the personality factors of positive emotionality (PEM), negative emotionality (NEM), and constraint (CON) during treatment were associated with subsequent changes in abstinence self-efficacy and SUD symptoms. We analyzed data at treatment entry, discharge, and 12-months post-discharge via univariate and bivariate latent change score models. During treatment, PEM, CON, and abstinence self-efficacy increased, while NEM decreased, on average. Changes in NEM and CON were largely sustained, whereas PEM and abstinence self-efficacy significantly decreased post-treatment. SUD symptoms decreased from pre- to post-treatment. In bivariate models, higher levels of NEM at baseline were associated with less improvement in both abstinence self-efficacy during treatment and SUD symptoms pre- to post-treatment. Higher levels of CON at baseline were associated with greater improvement in SUD symptoms pre- to post-treatment, and increases in CON during treatment were associated with greater retention of treatment gains in abstinence self-efficacy post-treatment. Greater improvements in CON during treatment were also associated with greater improvements in SUD symptoms pre- to post-treatment in unadjusted (p=0.041) but not adjusted models (p=0.089). Our findings suggest that personality changes marked by improvements in impulse control over the course of SUD treatment may be linked to subsequent improvements in treatment outcomes and may have value as a proximal treatment target among SUD patients during residential care.
View details for DOI 10.1016/j.jsat.2020.108187
View details for PubMedID 33298306
Criminal recidivism among justice-involved veterans following substance use disorder residential treatment.
2020; 106: 106357
Veterans in treatment for substance use disorders (SUD) often report past criminal offending. However, the rate of criminal recidivism in this population is unknown. Further, prior research in veterans has not examined personality factors as predictors of recidivism, despite the prominence of such factors in leading models of recidivism risk management. We examined these issues in a secondary data analysis of 197 military veterans with a history of criminal offending who were enrolled in an SUD residential treatment program. Participants were interviewed using several measurement instruments at treatment entry, one month into treatment, treatment discharge, and 12months post-discharge. Most veterans (94%) had a history of multiple charges, and 53% had recent involvement in the criminal justice system at the time of treatment entry. In the 12months post-discharge, 22% reported reoffending. In addition, 30% of patients who had been recently involved in the criminal justice system at treatment entry reoffended during follow-up. Higher friend relationship quality (OR=2.32, 95% CI [1.03, 5.21]) at treatment entry and higher staff ratings of patients' relationship quality with other residents during treatment (OR=2.76, 95% CI [1.40, 5.41]) predicted lower odds of recidivism post-discharge. After accounting for these factors, smaller reductions during treatment in the personality trait of Negative Emotionality predicted an increased risk for criminal recidivism post-discharge (OR=1.13, 95% CI [1.01, 1.26]). Results support augmenting the curriculum of SUD programs for veterans with services aimed at reducing risk for criminal recidivism, with a focus on interventions that directly target patients' social support networks and tendencies towards negative emotionality.
View details for DOI 10.1016/j.addbeh.2020.106357
View details for PubMedID 32120199
Spiritual struggles and suicidal ideation in veterans seeking outpatient treatment: The mediating role of perceived burdensomeness
Psychology of Religion and Spirituality
View details for DOI 10.1037/rel0000311
Examining cross-level effects in dyadic analysis: A structural equation modeling perspective.
Behavior research methods
2019; 51 (6): 2629–45
The actor-partner interdependence (APIM) and common-fate (CFM) models for dyadic data are well understood and widely applied. The actor and partner coefficients estimated in the APIM reflect the associations between individual-level variance components, whereas the CFM coefficient describes the association between dyad-level variance components. Additionally, both models assume that the theoretically relevant and/or empirically dominant component of variability resides at the same level (individual or dyad) across the predictor and outcome variables. The present work recasts the APIM and CFM in terms of dyadic nonindependence, or the extent to which a given variable reflects dyad- versus individual-level processes, and describes a pair of hybrid actor-partner and common-fate models that connect variance components residing at different levels. A series of didactic examples illustrate how the traditional APIM and CFM can be combined with the hybrid models to describe mediational processes that span the individual and dyad levels.
View details for DOI 10.3758/s13428-018-1117-5
View details for PubMedID 30203162
- Mindfulness and Mantra Training for Disaster Mental Health Workers in the Philippines MINDFULNESS 2018; 9 (4): 1181–90
Development and Validation of the Dissociative Symptoms Scale
2018; 25 (1): 84–98
The Dissociative Symptoms Scale (DSS) was developed to assess moderately severe levels of depersonalization, derealization, gaps in awareness or memory, and dissociative reexperiencing that would be relevant to a wide range of clinical populations. Structural analyses of data from four clinical and five nonclinical samples ( N = 1,600) yielded four factors that reflected the domains of interest and showed good fit with the data. Sample scores were consistent with expectations and showed very good internal consistency and temporal stability. Analyses showed consistent evidence of convergent and divergent validity, and posttrauma elevations in scores and in patients with posttraumatic stress disorder provided additional evidence of construct validity. Item response theory analyses indicated that the items assessed moderately severe dissociative experiences. Overall, the results provide support for the reliability and validity of DSS total and subscale scores in the populations studied. Further work is needed to evaluate the performance of the DSS relative to structured interview measures and in samples of patients with other psychological disorders.
View details for DOI 10.1177/1073191116645904
View details for Web of Science ID 000416007100007
View details for PubMedID 27178761
Factors associated with emergency department useamong veteran psychiatric patients
2017; 88 (4): 721–32
Frequent utilization of emergency department (ED) services contributes substantially to the cost of healthcare nationally and is often driven by psychiatric factors. Using national-level data from the Veterans Health Administration (VHA), the present study examined patient-level factors associated with ED use among veteran psychiatric patients. Veterans who had at least one ED visit with a psychiatric diagnosis in fiscal years 2011-2012 (n = 226,122) were identified in VHA administrative records. Andersen's behavioral model of healthcare utilization was used to identify need, enabling, and predisposing factors associated with frequency of ED use (primary outcome) in multivariate regression models. Greater ED use was primarily linked with need (psychotic, anxiety, personality, substance use, and bipolar disorders) and enabling (detoxification-related service utilization and homelessness) factors. Chronic medical conditions, receipt of an opioid prescription, and predisposing factors (e.g., younger age) were also linked to greater ED use; however, the effect sizes for these factors were markedly lower than those of most psychiatric and psychosocial factors. The findings suggest that intensive case management programs aimed reducing frequent ED use among psychiatric patients may require greater emphasis on homelessness and other psychosocial deficits that are common among these patients, and future research should explore cost-effective approaches to implementing these programs.
View details for PubMedID 28108941
Contributions of risk and protective factors to prediction of psychological symptoms after traumatic experiences
2016; 69: 106–15
Traumatic experiences cause considerable suffering and place a burden on society due to lost productivity, increases in suicidality, violence, criminal behavior, and psychological disorder. The impact of traumatic experiences is complicated because many factors affect individuals' responses. By employing several methodological improvements, we sought to identify risk factors that would account for a greater proportion of variance in later disorder than prior studies.In a sample of 129 traumatically injured hospital patients and family members of injured patients, we studied pre-trauma, time of trauma, and post-trauma psychosocial risk and protective factors hypothesized to influence responses to traumatic experiences and posttraumatic (PT) symptoms (including symptoms of PTSD, depression, negative thinking, and dissociation) two months after trauma.The risk factors were all significantly correlated with later PT symptoms, with post-trauma life stress, post-trauma social support, and acute stress symptoms showing the strongest relationships. A hierarchical regression, in which the risk factors were entered in 6 steps based on their occurrence in time, showed the risks accounted for 72% of the variance in later symptoms. Most of the variance in PT symptoms was shared among many risk factors, and pre-trauma and post-trauma risk factors accounted for the most variance.Collectively, the risk factors accounted for more variance in later PT symptoms than in previous studies. These risk factors may identify individuals at risk for PT psychological disorders and targets for treatment.
View details for PubMedID 27423351
View details for PubMedCentralID PMC5381967
Identifying Classes of Conjoint Alcohol and Marijuana Use in Entering Freshmen
PSYCHOLOGY OF ADDICTIVE BEHAVIORS
2015; 29 (3): 620–26
The current study identified classes of conjoint marijuana and alcohol use in entering college freshmen using latent profile analysis (N = 772; 53% male, 60% White; Mage = 18). Results yielded 4 distinct groups: Class 1 (moderate drinking with recent marijuana use: 22% of sample), Class 2 (moderate drinking with no recent marijuana use: 25%), Class 3 (light drinking with no recent marijuana use: 40%) and Class 4 (heavy drinking with recent marijuana use: 14%). Separate pairwise contrasts examined cross-class differences in demographics and drinking behaviors, comparing differences in drinking when current marijuana use was controlled (Class 1 vs. 4) and differences in marijuana use when drinking was held relatively constant (Class 1 vs. 2). Among moderate drinkers, recent marijuana users were more likely to drink more than intended, drink to get drunk, and had more problems (including higher rates of blackouts, physical injury, and DUI) relative to peers who refrained from marijuana. No cross-class differences were found for alcohol expectancies or behavioral motives. Findings from these analyses show the presence of distinct groups of conjoint users with different drinking behaviors and consequence profiles, and suggest that conjoint alcohol-marijuana use may be more problematic overall than single substance involvement and highlight the need for developing campus prevention and intervention programs that address the increased risk from polysubstance involvement.
View details for DOI 10.1037/adb0000089
View details for Web of Science ID 000361833900012
View details for PubMedID 26168228
Care and caring in the intensive care unit: Family members' distress and perceptions about staff skills, communication, and emotional support
JOURNAL OF CRITICAL CARE
2015; 30 (3): 557-561
Family members of intensive care unit (ICU) patients are sometimes highly distressed and report lower satisfaction with communication and emotional support from staff. Within a study of emotional responses to traumatic stress, associations between family distress and satisfaction with aspects of ICU care were investigated.In 29 family members of trauma patients who stayed in an ICU, we assessed symptoms of depression and posttraumatic stress disorder (PTSD) during ICU care. Later, family members rated staff communication, support, and skills and their overall satisfaction with ICU care.Ratings of staff competence and skills were significantly higher than ratings of frequency of communication, information needs being met, and support. Frequency of communication and information needs being met were strongly related to ratings of support (rs = .75-.77) and staff skills (rs = .77-.85), and aspects of satisfaction and communication showed negative relationships with symptoms of depression (rs = -.31 to -.55) and PTSD (rs = -.17 to -.43).Although satisfaction was fairly high, family member distress was negatively associated with several satisfaction variables. Increased understanding of the effects of traumatic stress on family members may help staff improve communication and increase satisfaction of highly distressed family members.
View details for DOI 10.1016/j.jcrc.2015.01.012
View details for Web of Science ID 000353400100023
View details for PubMedID 25682345
Traumatic Stressor Exposure and Post-Traumatic Symptoms in Homeless Veterans
2013; 178 (9): 970–73
To better understand potential risk factors for post-traumatic stress disorder (PTSD) and homelessness in veterans, we studied trauma exposure and responses in archival data on 115 homeless veterans.Rates of exposure to military and a variety of civilian high magnitude stressor (HMS) and persistent post-traumatic distress (PPD) events and symptoms of post-traumatic stress were assessed. The relationships between frequency of different trauma types and symptoms of post-traumatic stress were examined.Exposure to both HMS and PPD events were extremely high in this sample, with particularly high exposure to adult (82%) and childhood (62%) interpersonal violence HMS events and HMS events during military service (53%). Exposure to both military and civilian PPD events was associated with significantly higher levels of PTSD symptoms than exposure to no PPD events or only civilian PPD events, and almost all HMS event types were significantly correlated with both PTSD and dissociation symptoms.Post-traumatic symptoms and military and civilian traumatic stressors of all types should be assessed in homeless veterans because they may be contributing to poor social and occupational functioning.
View details for DOI 10.7205/MILMED-D-13-00080
View details for Web of Science ID 000340805500012
View details for PubMedID 24005545