Posttraumatic stress disorder symptoms, work-related trauma exposure, and substance use in first responders.

BACKGROUND: Posttraumatic stress disorder (PTSD) symptoms have been shown to increase the likelihood of substance use in the general population. First responders (e.g., EMTs, paramedics, and firefighters) are routinely exposed to potentially traumatic events (PTEs) as part of their regular duties, increasing their risk for a range of adverse mental health outcomes including PTSD symptoms. However, no study to our knowledge has explored the relationship between PTEs, PTSD symptoms, and substance use in this population. In the current study, we examined whether PTSD symptoms were associated with alcohol and drug use in first responders above and beyond demographic variables, job-related characteristics, social support, and cumulative work-related PTE exposure, and whether work-related PTE exposure had an indirect effect on substance use via PTSD symptoms. METHODS: Participants (N = 885; mean age = 37.13; 59.0% male; 91.5% White) were recruited from all 50 U.S. states, the Virgin Islands, and Puerto Rico to complete an online survey. RESULTS: In hierarchical regression analyses, PTSD symptoms were significantly associated with alcohol and drug use above and beyond all the other variables. Work-related PTE exposure was not a significant predictor of either outcome once PTSD symptoms were included, suggesting that PTEs confer risk for substance use via their association with PTSD symptoms. This finding was confirmed by an analysis showing that PTE exposure had a significant indirect effect on both alcohol and drug use via PTSD symptoms. CONCLUSION: Results support the need for periodic assessment of both PTSD symptoms and substance use in first responders.

Trauma Exposure Among Women in the Pacific Rim.

PURPOSE: Healthcare professionals who provide services in the immediate or long-term aftermath of traumatic events need to understand the nature and frequency of traumatic events in the lives of women. However, research on trauma exposure in women has only recently begun to assess events other than intimate partner and sexual violence and has not supported direct statistical comparison of cross-national and cross-cultural data. The purpose of this descriptive, correlational study was to describe and compare trauma exposure prevalence and type in community-based samples of women in the United States, Colombia, and Hong Kong. DESIGN: Women were recruited through posted notices at community health sites, snowball sampling, and online advertisements (N = 576). The Life Stressor Checklist-Revised (total score range 0 to 30) was used to determine the type and prevalence of trauma exposure. Data were collected by native language members of the research team. METHODS: Descriptive statistics were used to summarize demographic characteristics and trauma exposure for the total sample and each community-based sample (location). Between-location differences were tested using Fisher's exact tests for categorical measures and general linear models with pairwise a posteriori least squares t-test for continuous measures. Responses to open-ended questions were translated and categorized. FINDINGS: Over 99% of women in the total sample reported at least one traumatic life event. The mean number of traumatic life events per participant was 7, ranging from 0 to 24. Although there was consistency in the most commonly reported trauma exposures across locations, the rates of specific events often differed. CONCLUSIONS: Historical, political, geographic, and cultural factors may explain differences in trauma exposure among women in the four locations studied. CLINICAL RELEVANCE: This study offers relevant knowledge for providers in diverse locations who provide services to women who have experienced traumatic events and provides evidence for the need for future research to further enhance knowledge of trauma exposure among women, and on the effects of trauma in women's lives.

Socio-demographic patterns of posttraumatic stress disorder in Medellin, Colombia and the context of lifetime trauma exposure.

Colombia, South America is currently transitioning to post-conflict status following 6 decades of armed conflict. The population has experienced extensive exposures to potentially traumatic events throughout the lifespan. Sources of trauma exposure include the prolonged armed insurgency, narco-trafficking violence, urban gang violence, violent actions of criminal bands, intra-familial violence, gender-based violence, and sex trafficking. Exposure to potentially traumatic events is related to a variety of psychiatric outcomes, in particular, posttraumatic stress disorder. Given this context of lifetime trauma exposure, socio-demographic patterns of posttraumatic stress disorder were explored in a sample of residents of Medellin, Colombia, the nation's second largest city and a nexus for multiple types of trauma exposure.

Higher FKBP5, COMT, CHRNA5, and CRHR1 allele burdens are associated with PTSD and interact with trauma exposure: implications for neuropsychiatric research and treatment.

OBJECTIVE: The study aim was to assess the cumulative burden of polymorphisms located within four genetic loci previously associated with posttraumatic stress disorder (PTSD) among outpatients at risk for PTSD. METHODS: Diagnostic interviews were completed and DNA samples collected among 412 pain patients to determine if FKBP5 (rs9470080), COMT (rs4680), CHRNA5 (rs16969968), and CRHR1 (rs110402) single nucleotide polymorphisms were cumulatively associated with increased risk for PTSD. RESULTS: In bivariate analyses, it was found that a count of specific PTSD risk alleles located within FKBP5, COMT, CHRNA5, and CRHR1 genetic loci (allele range = 0-6, mean count = 2.92, standard deviation = 1.36) was associated with lifetime (t [409] = 3.430, P = 0.001) and early onset PTSD (t [409] = 4.239, P = 0.000028). In logistic regression, controlling for demographic factors, personality traits, and trauma exposures, this risk allele count remained associated with both lifetime (odds ratio = 1.49, P = 0.00158) and early onset PTSD (odds ratio = 2.36, P = 0.000093). Interaction effects were also detected, whereby individuals with higher risk allele counts and higher trauma exposures had an increased risk of lifetime PTSD (allele count × high trauma, P = 0.026) and early onset PTSD (allele count × high trauma, P = 0.016) in these logistic regressions. Those with no or few risk alleles appeared resilient to PTSD, regardless of exposure history. CONCLUSION: A cumulative risk allele count involving four single nucleotide polymorphisms located within the FKBP5, COMT, CHRNA5, and CRHR1 genes are associated with PTSD. Level of trauma exposure interacts with risk allele count, such that PTSD is increased in those with higher risk allele counts and higher trauma exposures. Since the single nucleotide polymorphisms studied encompass stress circuitry and addiction biology, these findings may have implications for neuropsychiatric research and treatment.