Alcohol Misuse and Co-Occurring Mental Disorders Among New Soldiers in the U.S. Army

Prospective associations of alcohol and drug misuse with suicidal behaviors among US Army soldiers who have left active service

BACKGROUND

This study examines the prospective associations of alcohol and drug misuse with suicidal behaviors among service members who have left active duty. We also evaluate potential moderating effects of other risk factors and whether substance misuse signals increased risk of transitioning from thinking about to attempting suicide.

METHOD

US Army veterans and deactivated reservists (N = 6,811) completed surveys in 2016-2018 (T1) and 2018-2019 (T2). Weights-adjusted logistic regression was used to estimate the associations of binge drinking, smoking/vaping, cannabis use, prescription drug abuse, illicit drug use, alcohol use disorder (AUD), and drug use disorder (DUD) at T1 with suicide ideation, plan, and attempt at T2. Interaction models tested for moderation of these associations by sex, depression, and recency of separation/deactivation. Suicide attempt models were also fit in the subgroup with ideation at T1 (n = 1,527).

RESULTS

In models controlling for socio-demographic characteristics and prior suicidality, binge drinking, cannabis use, prescription drug abuse, illicit drug use, and AUD were associated with subsequent suicidal ideation (AORs = 1.42-2.60, ps < .01). Binge drinking, AUD, and DUD were associated with subsequent suicide plan (AORs = 1.23-1.95, ps < .05). None of the substance use variables had a main effect on suicide attempt; however, interaction models suggested certain types of drug use predicted attempts among those without depression. Additionally, the effects of smoking/vaping and AUD differed by sex. Substance misuse did not predict the transition from ideation to attempt.

CONCLUSIONS

Alcohol and drug misuse are associated with subsequent suicidal behaviors in this population. Awareness of differences across sex and depression status may inform suicide risk assessment.

The Interaction Between Alcohol Misuse and Belongingness on Suicidal Ideation Among Military Personnel

Previous research suggests a high prevalence of suicidal ideation among military personnel. Suicidal ideation is associated with suicide attempts and death. This study focused on the association between belongingness-a component of the Interpersonal Psychological Theory of Suicide-and alcohol misuse on suicidal ideation among the different categories of military branch and military service status. Using the Military Suicide Research Consortium Common Data Elements database (N = 2516), we conducted linear regression analyses to examine the moderating effect of belongingness and alcohol misuse on the association between military branch and military service status (i.e., Active Duty) on suicidal ideation. Results showed a negative significant association between belongingness and suicidal ideation, and a positive significant association between alcohol and suicidal ideation. The results indicated that alcohol misuse moderated the association between military branch and suicidal ideation, but did not moderate the association between military service status and suicidal ideation. Additionally, the results indicated that belongingness moderated the association between military branch and suicidal ideation and the association between military service status and suicidal ideation. The results highlight the differences across military branches and military service statuses and suggest the importance of developing tailored suicide prevention programs to address the specific needs of each military subpopulation.

COVID-19 Concerns, Information Needs, and Adverse Mental Health Outcomes among U.S. Soldiers

INTRODUCTION

The coronavirus disease 2019 (COVID-19) pandemic disrupted U.S. Military operations and potentially compounded the risk for adverse mental health outcomes by layering unique occupational stress on top of general restrictions, fears, and concerns. The objective of the current study was to characterize the prevalence of COVID-19 concerns and information needs, demographic disparities in these outcomes, and the degree to which COVID-19 concerns and information needs were associated with heightened risk for adverse mental health outcomes among U.S. Army soldiers.

MATERIALS AND METHODS

Command-directed anonymous surveys were administered electronically to U.S. soldiers assigned to one of three regional commands in the Northwest United States, Europe, and Asia-Pacific Region. Surveys were administered in May to June 2020 to complete (time 1: n = 21,294) and again in December 2020 to January 2021 (time 2: n = 10,861). Only active duty or active reservists/national guard were eligible to participate. Members from other branches of service were also not eligible.

RESULTS

Highly prevalent COVID-19 concerns included the inability to spend time with friends/family, social activities, and changing rules, regulations, and guidance related to COVID-19. Some information needs were endorsed by one quarter or more soldiers at both time points, including stress management/coping, travel, how to protect oneself, and maintaining mission readiness. COVID-19 concerns and information needs were most prevalent among non-White soldiers. Concerns and information needs did not decline overall between the assessments. Finally, COVID-19 concerns were associated with greater risk of multiple adverse mental health outcomes at both time points.

CONCLUSIONS

COVID-19 concerns and information needs were prevalent and showed little evidence of decrement over the course of the first 6 months of the pandemic. COVID-19 concerns were consistently associated with adverse mental health outcomes. These data highlight two targets and potential demographic subgroups such that local leadership and Army medicine and public health enterprises can be better prepared to monitor and address to maintain force health and readiness in the face of possible future biomedical threats.

Healthcare utilization and readiness outcomes among soldiers with post-deployment at-risk drinking, by multimorbidity class

Although alcohol use disorder (AUD) regularly co-occurs with other conditions, there has not been investigation of specific multimorbidity classes among military members with at-risk alcohol use. We used latent class analysis (LCA) to cluster 138,929 soldiers with post-deployment at-risk drinking based on their co-occurring psychological and physical health conditions and indicators of alcohol severity. We examined the association of these multimorbidity classes with healthcare utilization and military readiness outcomes. Latent class analysis was conducted on 31 dichotomous indicators capturing alcohol use severity, mental health screens, psychological and physical health diagnoses, and tobacco use. Longitudinal survival analysis was used to examine the relative hazards of class membership regarding healthcare utilization (e.g., emergency department visit, inpatient stay) and readiness outcomes (e.g., early separation for misconduct). Latent class analysis identified five classes: Class 1 -Relatively Healthy (51.6 %); Class 2 - Pain/Tobacco (17.3 %); Class 3 - Heavy Drinking/Pain/Tobacco (13.1 %); Class 4 - Mental Health/Pain/Tobacco (12.7 %); and Class 5 - Heavy Drinking/Mental Health/Pain/Tobacco (5.4 %). Musculoskeletal pain and tobacco use were prevalent in all classes, though highest in Classes 2, 4, and 5. Classes 4 and 5 had the highest hazards of all outcomes. Class 5 generally exhibited slightly higher hazards of all outcomes than Class 4, demonstrating the exacerbation of risk among those with heavy drinking/AUD in combination with mental health conditions and other multimorbidity. This study provides new information about the most common multimorbidity presentations of at-risk drinkers in the military so that targeted, individualized care may be employed. Future research is needed to determine whether tailored prevention and treatment approaches for soldiers in different multimorbidity classes is associated with improved outcomes.

Substance Use after Completion of an Intensive Treatment Program with Concurrent Treatment for Posttraumatic Stress Disorder and Substance Use among Veterans: Examining the Role of PTSD Symptoms

OBJECTIVE

Substance use disorders (SUDs) and posttraumatic stress disorder (PTSD) are costly and highly co-occurring diagnoses, particularly among veterans, suggesting a need to understand this comorbidity and effectively treat both disorders among this population.

METHODS

The current study aimed to examine substance use outcomes among post-9/11 veterans and service members (N = 48) who completed a two-week intensive outpatient program with concurrent treatment for and PTSD using Prolonged Exposure and substance use. Substance use was assessed at two weeks and three months posttreatment.

RESULTS

The intensive program had high completion rates and demonstrated decreases in substance use at two weeks and three months posttreatment. Additionally, lower PTSD symptoms at treatment completion were related to less substance use posttreatment.

CONCLUSIONS

Concurrent intensive treatment of PTSD and SUDs can lead to symptom improvement in a short period of time. Findings support the self-medication model, such that PTSD symptoms at treatment completion were related to substance use at follow-up.

Oxytocin Reduces Sensitized Stress-Induced Alcohol Relapse in a Model of Posttraumatic Stress Disorder and Alcohol Use Disorder Comorbidity

BACKGROUND

There is high comorbidity of posttraumatic stress disorder (PTSD) and alcohol use disorder with few effective treatment options. Animal models of PTSD have shown increases in alcohol drinking, but effects of stress history on subsequent vulnerability to alcohol relapse have not been examined. Here we present a mouse model of PTSD involving chronic multimodal stress exposure that resulted in long-lasting sensitization to stress-induced alcohol relapse, and this sensitized stress response was blocked by oxytocin (OT) administration.

METHODS

Male and female mice trained to self-administer alcohol were exposed to predator odor (TMT) + yohimbine over 5 consecutive days or left undisturbed. After reestablishing stable alcohol responding/intake, mice were tested under extinction conditions, and then all mice were exposed to TMT or context cues previously associated with TMT before a reinstatement test session. Separate studies examined messenger RNA expression of Oxt and Oxtr in hypothalamus following chronic stress exposure. A final study examined the effects of systemic administration of OT on stress-induced alcohol relapse in mice with and without a history of chronic stress experience.

RESULTS

Chronic stress exposure produced long-lasting sensitization to subsequent stress-induced alcohol relapse that also generalized to stress-related context cues and transcriptional changes in hypothalamic OT system. OT injected before the reinstatement test session completely blocked the sensitized stress-induced alcohol relapse effect.

CONCLUSIONS

Collectively, these results provide support for the therapeutic potential of OT, along with highlighting the value of utilizing this model in evaluating other pharmacological interventions for treatment of PTSD/alcohol use disorder comorbidity.

Calibrating the Alcohol Use Disorders Identification Test-Consumption (AUDIT-C) for detecting alcohol-related problems among Canadian, UK and US soldiers: cross-sectional pre-deployment and post-deployment survey results

OBJECTIVES

Excessive alcohol use can bring about adverse health and work-related consequences in civilian and military populations. Screening for excessive drinking can help identify individuals at risk for alcohol-related problems who may require clinical interventions. The brief validated measures of alcohol use such as the Alcohol Use Disorders Identification Test (AUDIT), or abbreviated AUDIT-Consumption (AUDIT-C), are often included in military deployment screening and epidemiologic surveys, but appropriate cut-points must be used to effectively identify individuals at risk. Although the conventional AUDIT-C cut-points ≥4 for men and ≥3 for women are commonly used, recent validation studies of veterans and civilians recommend higher cut-points to minimise misclassification and overestimation of alcohol-related problems. This study aims to ascertain optimal AUDIT-C cut-points for detecting alcohol-related problems among serving Canadian, UK and US soldiers.

DESIGN

Cross-sectional pre/post-deployment survey data were used.

SETTINGS

Comprised Army locations in Canada and UK, and selected US Army units.

PARTICIPANTS

Included soldiers in each of the above-mentioned settings.

OUTCOME MEASURES

Soldiers' AUDIT scores for hazardous and harmful alcohol use or high levels of alcohol problems served as a benchmark against which optimal sex-specific AUDIT-C cut-points were assessed.

RESULTS

Across the three-nation samples, AUDIT-C cut-points of ≥6/7 for men and ≥5/6 for women performed well in detecting hazardous and harmful alcohol use and provided comparable prevalence estimates to AUDIT scores ≥8 for men and ≥7 for women. The AUDIT-C cut-point ≥8/9 for both men and women performed fair-to-good when benchmarked against AUDIT ≥16, although inflated AUDIT-C-derived prevalence estimates and low positive predictive values were observed.

CONCLUSION

This multi-national study provides valuable information regarding appropriate AUDIT-C cut-points for detecting hazardous and harmful alcohol use, and high levels of alcohol problems among soldiers. Such information can be useful for population surveillance, pre-deployment/post-deployment screening of military personnel, and clinical practice.

Chronic ethanol consumption exacerbates future stress-enhanced fear learning, an effect mediated by dorsal hippocampal astrocytes

BACKGROUND

Alcohol use disorder (AUD) and post-traumatic stress disorder (PTSD) are highly comorbid, yet there is a lack of preclinical research investigating how prior ethanol (EtOH) dependence influences the development of a PTSD-like phenotype. Furthermore, the neuroimmune system has been implicated in the development of both AUD and PTSD, but the extent of glial involvement in this context remains unclear. A rodent model was developed to address this gap in the literature.

METHODS

We used a 15-day exposure to the 5% w/v EtOH low-fat Lieber-DeCarli liquid diet in combination with the stress-enhanced fear learning (SEFL) paradigm to investigate the effects of chronic EtOH consumption on the development of a PTSD-like phenotype. Next, we used a reverse transcription quantitative real-time polymerase chain reaction to quantify mRNA expression of glial cell markers GFAP (astrocytes) and CD68 (microglia) following severe footshock stress in EtOH-withdrawn rats. Finally, we tested the functional contribution of dorsal hippocampal (DH) astrocytes in the development of SEFL in EtOH-dependent rats using astrocyte-specific Gi designer receptors exclusively activated by designer drugs (Gi -DREADD).

RESULTS

Results demonstrate that chronic EtOH consumption and withdrawal exacerbate future SEFL. Additionally, we found significantly increased GFAP mRNA expression in the dorsal and ventral hippocampus and amygdalar complex following the severe stressor in EtOH-withdrawn animals. Finally, the stimulation of the astroglial Gi -DREADD during EtOH withdrawal prevented the EtOH-induced enhancement of SEFL.

CONCLUSIONS

Collectively, results indicate that prior EtOH dependence and withdrawal combined with a severe stressor potentiate future enhanced fear learning. Furthermore, DH astrocytes significantly contribute to this change in behavior. Overall, these studies provide insight into the comorbidity of AUD and PTSD and the potential neurobiological mechanisms behind increased susceptibility to a PTSD-like phenotype in individuals with AUD.

Does Drinking Culture Induce Problematic Alcohol Use? Evidence From a Military Representative Survey in Korea

OBJECTIVE

To examine the relationship between problematic alcohol use and contributing factors among Korean professional soldiers.

METHODS

Cross-sectional data of 2,646 participants collected by 2014 military-wide representative health survey was analyzed. Multivariate logistic models were used to identify contributing factors for problematic alcohol use. Problematic alcohol use was defined by the Alcohol Use Disorders Identification Test (AUDIT) questionnaire as hazardous (8≤ AUDIT <16) or harmful (AUDIT ≥16). Tolerant drinking culture was measured by the Drinking Culture Questionnaire.

RESULTS

Hazardous alcohol use was found in 56.9% of men and 46.8% of women and harmful use in a further 16.2% of men and 5.4% of women. In univariate analyses, perceived health status, subjective sleep quality, depression, and drinking culture were related to the outcome variable. In multivariate models controlling covariates, the likelihood of problematic alcohol use was significantly increased by man gender, being single, current/past smoking, and tolerant/permissive drinking culture. In those with harmful alcohol consumption, tolerant drinking culture was a particularly powerful influence.

CONCLUSION

A substantial proportion of Korean professional soldiers demonstrated problematic alcohol use. Tolerant drinking culture was shown to have a significant influence on problematic alcohol use in the military. Our findings underscore the need for public health policies that address this drinking culture to mitigate negative health consequences and preserve the forces' combat readiness.

The role of PTSD symptom clusters and criterion in predicting future high-risk drug and alcohol use among returning veteran men and women

The prevalence of co-occurring posttraumatic stress disorder (PTSD) and substance use disorder (SUD) remains exceptionally high among returning veterans, with numerous studies linking PTSD, but not specific PTSD symptoms, to future SUD risk. Further explication of PTSD symptom effects on future SUD risk will likely promote intervention development and refinement while offsetting SUD risk. Accordingly, In this study we explored the prospective associations between PTSD symptom clusters, symptoms, and future SUD risk and use of specific drug classes. Returning veterans (N = 1,295; M_age = 42.3, SD = 9.89; 51% female; 66.8% White) completed structured diagnostic interviews to assess PTSD symptoms and self-report measures of substance use 14-36 months later (M = 24.59, SD = 2.97). Hyperarousal and reckless/self-destructive symptoms specifically predicted future high-risk drug use and binge drinking behavior, and avoidance of internal stimuli (i.e., of trauma memories, thoughts, and feelings) differentiated individuals classified as high-risk for alcohol use based on their AUDIT total score. Further, negative alterations in cognition and mood predicted future opioid (i.e., nightmares) and stimulant use (i.e., flashbacks), whereas concentration difficulties were inversely associated with future binge drinking. This longitudinal study identified prospective and enduring associations between specific PTSD symptom clusters, symptoms, and future high-risk substance use patterns among returning veterans. Accordingly, careful assessment of specific PTSD criteria and differential motivations for substance use is warranted, along with tailored interventions to offset risk for opioid, stimulant, and alcohol use among returning veterans. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Imaginal exposure processing during Concurrent Treatment of PTSD and Substance Use Disorders using Prolonged Exposure (COPE) therapy: Examination of linguistic markers of cohesiveness

Concurrent Treatment of PTSD and Substance Use Disorders Using Prolonged Exposure (COPE) is an integrated, evidence-based treatment that results in significant reductions in posttraumatic stress disorder (PTSD) and substance use disorder (SUD) severity. Emotional processing theory suggests that successful prolonged exposure-based treatments should result in more cohesive trauma narratives due to better integration and organization of trauma memory into cognitive conceptualizations of fear. Therefore, we hypothesized that language used by patients would become more cohesive over time and increased language cohesion would be related to larger reductions in PTSD and SUD outcomes. Broadly, language cohesion refers to several linguistic devices that help establish and cohere meaning throughout spoken and written discourse (e.g., increased use of transition words like "and," "then," and "but"). This was the first known study to examine changes in language related to both PTSD and SUD severity during COPE treatment. The sample included 28 military veterans with current comorbid PTSD/SUD enrolled in a larger COPE study. A text analysis program, Coh-Metrix, was used to analyze language cohesiveness. No language cohesion variables significantly changed over time. Narrativity levels significantly moderated change in PTSD outcomes, R β 2 $R_\beta ^2\;$ = 0.11. Adversative connectives significantly moderated change in SUD outcomes, R β 2 $R_\beta ^2\;$ = 0.26. The findings illuminate potential processes underlying successful COPE treatment. Less use of language conveying a narrative and more use of contrast-indicative words (e.g., but, whereas) was associated with larger reductions in PTSD and SUD outcomes during treatment. These results contribute to the extant literature on associations between trauma exposure, language, and emotional processing.

Gene Expression Analysis in Three Posttraumatic Stress Disorder Cohorts Implicates Inflammation and Innate Immunity Pathways and Uncovers Shared Genetic Risk With Major Depressive Disorder

Posttraumatic stress disorder (PTSD) is a complex psychiatric disorder that can develop following exposure to traumatic events. The Psychiatric Genomics Consortium PTSD group (PGC-PTSD) has collected over 20,000 multi-ethnic PTSD cases and controls and has identified both genetic and epigenetic factors associated with PTSD risk. To further investigate biological correlates of PTSD risk, we examined three PGC-PTSD cohorts comprising 977 subjects to identify differentially expressed genes among PTSD cases and controls. Whole blood gene expression was quantified with the HumanHT-12 v4 Expression BeadChip for 726 OEF/OIF veterans from the Veterans Affairs (VA) Mental Illness Research Education and Clinical Center (MIRECC), 155 samples from the Injury and Traumatic Stress (INTRuST) Clinical Consortium, and 96 Australian Vietnam War veterans. Differential gene expression analysis was performed in each cohort separately followed by meta-analysis. In the largest cohort, we performed co-expression analysis to identify modules of genes that are associated with PTSD and MDD. We then conducted expression quantitative trait loci (eQTL) analysis and assessed the presence of eQTL interactions involving PTSD and major depressive disorder (MDD). Finally, we utilized PTSD and MDD GWAS summary statistics to identify regions that colocalize with eQTLs. Although not surpassing correction for multiple testing, the most differentially expressed genes in meta-analysis were interleukin-1 beta (IL1B), a pro-inflammatory cytokine previously associated with PTSD, and integrin-linked kinase (ILK), which is highly expressed in brain and can rescue dysregulated hippocampal neurogenesis and memory deficits. Pathway analysis revealed enrichment of toll-like receptor (TLR) and interleukin-1 receptor genes, which are integral to cellular innate immune response. Co-expression analysis identified four modules of genes associated with PTSD, two of which are also associated with MDD, demonstrating common biological pathways underlying the two conditions. Lastly, we identified four genes (UBA7, HLA-F, HSPA1B, and RERE) with high probability of a shared causal eQTL variant with PTSD and/or MDD GWAS variants, thereby providing a potential mechanism by which the GWAS variant contributes to disease risk. In summary, we provide additional evidence for genes and pathways previously reported and identified plausible novel candidates for PTSD. These data provide further insight into genetic factors and pathways involved in PTSD, as well as potential regions of pleiotropy between PTSD and MDD.

Results of a Randomized Trial of Screening, Brief Intervention, and Referral to Treatment (SBIRT) to Reduce Alcohol Misuse Among Active-Duty Military Personnel

OBJECTIVE

Rates of heavy alcohol use among active-duty military personnel in the United States are high and negatively affect individuals within the service branches. This study tested the effectiveness of a military-focused screening, brief intervention, and referral to treatment (SBIRT) intervention for reducing risky alcohol use among active-duty patients.

METHOD

We used a randomized, parallel, two-group design to test the effectiveness of the SBIRT intervention in a convenience sample of service members recruited from the emergency department of a military hospital. A total of 791 participants were randomized to the SBIRT or usual care conditions, and 472 participants (59.7%) completed a 6-month follow-up. Fifteen percent of the sample was female. Self-reported Alcohol Use Disorders Identification Test (AUDIT), controlled drinking self-efficacy (CDSE), and readiness to change drinking behaviors were assessed at baseline and follow-up.

RESULTS

Among higher risk participants (i.e., AUDIT ≥8), results of a complete case analysis showed a significant reduction in scores on the AUDIT-C (consumption questions from the AUDIT) and a significant increase in CDSE. Null findings were observed for intent-to-treat analyses testing the effectiveness of the SBIRT intervention; significant decreases in AUDIT and AUDIT-C scores and significant increases in CDSE were observed over time, irrespective of condition assignment for both complete case and intent-to-treat analyses.

CONCLUSIONS

Results of a complete case analysis provided some support for the effectiveness of the SBIRT intervention for higher risk participants. The results of the more conservative intent-to-treat analyses did not support any of the study hypotheses. Future SBIRT effectiveness trials should also test electronic SBIRT intervention approaches.

The neural, behavioral, and epidemiological underpinnings of comorbid alcohol use disorder and post-traumatic stress disorder

Alcohol use disorder (AUD) and (PTSD) frequently co-occur and individuals suffering from this dual diagnosis often exhibit increased symptom severity and poorer treatment outcomes than those with only one of these diseases. Although there have been significant advances in our understanding of the neurobiological mechanisms underlying each of these disorders, the neural underpinnings of the comorbid condition remain poorly understood. This chapter summarizes recent epidemiological findings on comorbid AUD and PTSD, with a focus on vulnerable populations, the temporal relationship between these disorders, and the clinical consequences associated with the dual diagnosis. We then review animal models of the comorbid condition and emerging human and non-human animal research that is beginning to identify maladaptive neural changes common to both disorders, primarily involving functional changes in brain reward and stress networks. We end by proposing a neural framework, based on the emerging field of affective valence encoding, that may better explain the epidemiological and neural findings on AUD and PTSD.

Psychological and physical condition of Japan maritime self-defense force personnel who performed disaster-relief missions after the 2011 great east Japan earthquake

The Great East Japan Earthquake, which occurred on March 11, 2011, was the most powerful earthquake ever recorded in Japan. In the present study, we examine personnel from the Japan Maritime Self-Defense Force who performed disaster relief in the earthquake's aftermath, focusing on the associated psychological and physical impacts. Overall, 8733 personnel were examined. In both July-August 2011 (M1) and July 2012 (M2), these personnel answered the Impact of Events Scale-Revised, the Kessler Psychological Distress Scale, and the Disaster Relief Questionnaire. We also analyzed the sample's physical examination records for the periods before and after the earthquake, using as controls a sample of peers who were not dispatched to the disaster area (N = 32,270). The psychological examinations showed that, in M1, holding the rank of private/sergeant (odds ratio [OR] = 2.13), performing body-recovery duties (OR = 1.94), and having disaster-affected family members (OR = 2.13) were significant risk factors for high post-traumatic stress response (PTSR). In M2, performing body-recovery duties (OR = 1.45) and having disaster-affected family members (OR = 2.60) were significant risk factors for high PTSR. Also, being woman (OR = 2.18) and having disaster-affected family members (OR = 1.68) were significant risk factors for high general psychological distress. For the physical examinations, the mean alanine transaminase in the dispatched group (31.73 ± 25.21) was significantly higher than that in the non-dispatched group (29.56 ± 21.03). These findings suggest that personnel involved in disaster relief experience psychological impacts in the subacute stage, but that these impacts attenuate one year after the event.

Ethnoracial differences in treatment-seeking veterans with substance use disorders and co-occurring PTSD: Presenting characteristics and response to integrated exposure-based treatment

OBJECTIVE

Substance use disorders (SUD) and posttraumatic stress disorder (PTSD) frequently co-occur. While previous research has examined ethnoracial differences among individuals with either SUD or PTSD, little research to date has focused on individuals with co-occurring SUD/PTSD. The current study addresses this gap in the literature.

METHOD

Participants were 79 military veterans (91% male; 38% African American [AA] and 62% White) with current SUD/PTSD who were randomized to receive Concurrent Treatment of PTSD and Substance Use Disorders using Prolonged Exposure (COPE) or Relapse Prevention (RP). Primary outcomes included substance use and self-reported and clinician-rated PTSD symptoms.

RESULTS

At baseline, AA participants were significantly older, reported greater substance and alcohol use, and tended to report higher PTSD severity than White participants. AA participants evidenced greater decreases in substance and alcohol use during treatment, but greater increases in substance and alcohol use during follow-up as compared to White participants. All participants decreased alcohol consumption during treatment; however, AA participants in the COPE condition and White participants in the RP condition evidenced the steepest decreases in average number of drinks per drinking day (DDD) during treatment. Additionally, White participants receiving RP reported greater increases in DDD during follow-up compared to AA participants.

CONCLUSION

Overall, integrated treatment for co-occurring SUD/PTSD was effective for both AA and White participants; however, some important differences emerged by ethnoracial group. Findings suggest that greater attention to race and ethnicity is warranted to better understand the needs of diverse patients with SUD/PTSD and to optimize treatment outcomes.

[Not Available]

Objectives:

Research suggests a high prevalence of problematic alcohol use among military personnel relative to civilians. Our primary objectives were to compare the prevalence, correlates, help-seeking behaviors, perceived need for care, and barriers to care for alcohol use disorders (AUDs) in the Canadian Armed Forces (CAF) and the Canadian general population (CGP).

Methods:

Data were from 2 nationally representative surveys collected by Statistics Canada: (1) the Canadian Community Health Survey on Mental Health collected in 2012 (N = 25,113; response rate = 68.9%) and (2) the Canadian Forces Mental Health Survey collected in 2013 (N = 8,161; response rate = 79.8%). Descriptive statistics and logistic regression were used to examine differences in outcomes of interest associated with AUDs in the CAF and CGP.

Results:

The prevalence of lifetime AUDs was significantly higher in the CAF (32.0%) than the CGP (20.3%; adjusted odds ratio [AOR] = 1.14, 95% confidence interval [CI, 1.02 to 1.27]) after adjustment for sociodemographic covariates. In contrast, the past-year prevalence of AUDs was significantly lower among CAF personnel (4.5%) than civilians (3.8%; AOR = 0.78, 95% CI [0.61 to 0.99]) after adjustment for sociodemographic covariates. Child abuse history and comorbid mental disorders were strongly associated with past-year AUDs in both populations. CAF personnel compared to the CGP were more likely to perceive a need for care (AOR = 4.15, 95% CI [2.56 to 6.72]) and engage in help-seeking behaviors (significant AORs ranged from 1.85 to 5.54). CAF personnel and civilians with past-year AUDs reported different barriers to care.

Conclusions:

Findings argue for the value of different approaches to address unmet need for AUD care in the CAF and CGP.

Hazardous drinking and clinical correlates among suicidal patients receiving psychiatric inpatient care at military medical settings

BACKGROUND

To describe prevalence and identify clinical correlates of hazardous drinking among suicidal inpatients at military medical settings.

METHOD

Data were drawn from the baseline assessment of a multisite randomized controlled trial of Post-Admission Cognitive Therapy (PACT). Participants were military Service members or adult beneficiaries (N = 218) who were admitted to inpatient care following a suicide-related crisis. Hazardous alcohol use in the past year was assessed using the Alcohol Use Disorder Identification Test (AUDIT).

RESULTS

The average AUDIT score was 6.78 (SD = 7.87), with 28.9% reporting hazardous drinking (scored ≥8 on the AUDIT). Hazardous drinkers were more likely than nonhazardous drinkers to meet diagnosis of Substance Use Disorder (SUD; Odds Ratio [OR] = 5.96, 95% confidence intervals [CI] = 2.13, 16.71). Hazardous drinking was neither associated with measures of suicide ideation nor aborted or interrupted suicide attempt. However, hazardous drinkers had greater risk of having both single (RRR [Relative Risk Ratio] = 2.55, 95% CI = 1.18, 5.50) and multiple actual suicide attempts (RRR = 2.38, 95% CI = 1.06, 5.32) than nonhazardous drinkers. The association between hazardous drinking and single (but not multiple) actual suicide attempt remained significant after controlling for gender, depressive symptoms, hopelessness, Post-Traumatic Stress Disorder, and SUD (adjusted RRR = 2.48, 95% CI = 1.09, 5.65).

CONCLUSIONS

A history of actual suicide attempt is associated with hazardous alcohol use among suicidal psychiatric inpatients. Assessment of drinking and drug use may inform case conceptualization and treatment of suicide-related behaviors in psychiatric inpatient settings.

The Association Between Posttraumatic Negative Self-Conscious Cognitions and Emotions and Maladaptive Behaviors: Does Time Since Trauma Exposure Matter?

Negative beliefs about the self, self-blame, guilt, and shame have been consistently linked to emotional problems, such as posttraumatic stress disorder and depression, following trauma exposure. To expand understanding of the potential role of negative self-conscious cognitions and emotions in other forms of posttrauma maladjustments, such as maladaptive behaviors, the current study examined the associations between these cognitions and emotions with dissociation, alcohol use, and avoidant problem-solving. As a secondary goal, the influence of time since trauma exposure was considered given recent data suggesting that some posttraumatic responses require lengthier time following trauma to become salient. Multiple-group analysis was conducted in two groups of female survivors of intimate partner violence (IPV): women whose IPV experiences occurred within 3 months prior to assessment (early posttrauma phase [EPP]; n = 67) and those whose experiences occurred 12 months or more prior to assessment (chronic posttrauma phase [CPP]; n = 145). The results suggested model invariance. Posttraumatic negative self-conscious cognitions and emotions were significantly correlated with dissociation (EPP group: β = .61, p < .001 and CPP group: β = .48, p < .001), alcohol use (EPP group: β = .31, p = .014 and CPP group: β = .30, p < .001), and avoidant problem-solving (EPP group: β = .58, p < .001 and CPP group: β = .56, p < .001). The findings highlight the importance of negative self-conscious cognitions and emotions in posttrauma maladjustment and support intervening in these domains shortly after trauma exposure.

Genomics of posttraumatic stress disorder in veterans: Methods and rationale for Veterans Affairs Cooperative Study #575B

OBJECTIVES

Heritability in the risk for developing posttraumatic stress disorder (PTSD) has been established, but most genome-wide association studies (GWASs) of PTSD involve relatively small sample sizes and limited identification of associated genetic loci. This report describes the methodology of a Veterans Affairs (VA) Cooperative Studies Program GWAS of PTSD among combat-exposed U.S. veterans.

METHODS

Probable cases (with PTSD) and probable controls (without PTSD) were identified from among veterans enrolled in the VA Million Veteran Program (MVP) with an algorithm developed using questionnaire responses and electronic health record information. This algorithm, based on a statistical model, relied on medical chart reviews as a reference standard and was refined using telephone interviews. Subsequently, to evaluate the impact of probabilistic phenotyping on statistical power, the threshold probability for case-control selection was varied in simulations.

RESULTS

As of September 2018, >695,000 veterans have enrolled in MVP. For current analyses, genotyping data were available for >353,000 participants, including >83,000 combat-exposed veterans. A threshold probability of 0.7 for case and control designation yielded an interim >16,000 cases and >33,000 controls.

CONCLUSIONS

A formal methodological approach was used to identify cases and controls for subsequent GWAS analyses to identify genetic risk loci for PTSD.

Nicotine Dependence and Pre-Enlistment Suicidal Behavior Among U.S. Army Soldiers

INTRODUCTION

Identification of modifiable risk factors for suicidal behaviors is a priority for the U.S. Army. This study investigated associations of nicotine dependence with suicidal behaviors among incoming soldiers.

METHODS

Lifetime DSM-IV nicotine dependence, mental disorders, suicidal behaviors, and their ages of onset were retrospectively assessed in the Army Study to Assess Risk and Resilience in Servicemembers (Army STARRS) New Soldier Study. Discrete-time survival analysis of person-year data from 30,436 soldiers was performed to evaluate associations of nicotine dependence with subsequent suicidal ideation, plans, and attempts. Among respondents with lifetime ideation (n=4,060), models tested associations of nicotine dependence with progression from ideation to first onset of plan, from plan to first attempt, and, among ideators without plans, from ideation to first unplanned attempt. A hierarchy of models incorporated increasing controls for other risk factors. Data were collected in 2011-2012 and analyzed in 2017-2018.

RESULTS

In models controlling for sociodemographic characteristics, nicotine dependence was associated with onset of all suicidal behaviors (AORs, 2.07-4.08, p<0.001) and with each type of progression of suicidal behavior (AORs, 1.48-2.44, p<0.005). After adjusting for childhood adversities and mental disorders, nicotine dependence remained associated with onset of ideation (AOR=1.27, 95% CI=1.10, 1.46, p=0.001) and attempt (AOR=1.83, 95% CI=1.41, 2.37, p<0.001); and with progression from ideation to unplanned attempt (AOR=2.03, 95% CI=1.17, 1.74, p<0.001).

CONCLUSIONS

Nicotine dependence exhibited associations with onset of suicidal ideation and suicide attempt-and with progression from ideation to unplanned attempt-that were independent of other measured risk factors. Awareness of associations of nicotine dependence with suicidal behaviors may inform risk assessment, facilitate targeting of prevention efforts, and provide further impetus for reducing nicotine dependence.

Concurrent treatment of substance use disorders and PTSD using prolonged exposure: A randomized clinical trial in military veterans

OBJECTIVE

A substantial amount of individuals with substance use disorders (SUD) also meet criteria for posttraumatic stress disorder (PTSD). Prolonged Exposure (PE) is an effective, evidence-based treatment for PTSD, but there is limited data on its use among individuals with current alcohol or drug use disorders. This study evaluated the efficacy of an integrated treatment that incorporates PE (Concurrent Treatment of PTSD and Substance Use Disorders Using Prolonged Exposure or COPE) among veterans.

METHOD

Military veterans (N = 81, 90.1% male) with current SUD and PTSD were randomized to 12 sessions of COPE or Relapse Prevention (RP). Primary outcomes included the Clinician Administered PTSD Scale (CAPS), PTSD Checklist-Military version (PCL-M), and the Timeline Follow-back (TLFB).

RESULTS

On average, participants attended 8 out of 12 sessions and there were no group differences in retention. Intent-to-treat analyses revealed that COPE, in comparison to RP, resulted in significantly greater reductions in CAPS (d = 1.4, p < .001) and PCL-M scores (d = 1.3, p = .01), as well as higher rates of PTSD diagnostic remission (OR = 5.3, p < .01). Both groups evidenced significant and comparable reductions in SUD severity during treatment. At 6-months follow-up, participants in COPE evidenced significantly fewer drinks per drinking day than participants in RP (p = .05).

CONCLUSIONS

This study is the first to report on the use of an integrated, exposure-based treatment for co-occurring SUD and PTSD in a veteran sample. The findings demonstrate that integrated, exposure-based treatments are feasible and effective for military veterans with SUD and PTSD. Implications for clinical practice are discussed.

The Army Study to Assess Risk and Resilience in Servicemembers (Army STARRS): progress toward understanding suicide among soldiers

Responding to an unprecedented increase in the suicide rate among soldiers, in 2008 the US Army and US National Institute of Mental Health funded the Army Study to Assess Risk and Resilience in Servicemembers (Army STARRS), a multicomponent epidemiological and neurobiological study of risk and resilience factors for suicidal thoughts and behaviors, and their psychopathological correlates among Army personnel. Using a combination of administrative records, representative surveys, computerized neurocognitive tests, and blood samples, Army STARRS and its longitudinal follow-up study (STARRS-LS) are designed to identify potentially actionable findings to inform the Army's suicide prevention efforts. The current report presents a broad overview of Army STARRS and its findings to date on suicide deaths, attempts, and ideation, as well as other important outcomes that may increase suicide risk (e.g., mental disorders, sexual assault victimization). The findings highlight the complexity of environmental and genetic risk and protective factors in different settings and contexts, and the importance of life and career history in understanding suicidal thoughts and behaviors.

Treatment of co-occurring posttraumatic stress disorder and substance use: Does order of onset influence outcomes?

OBJECTIVE

Posttraumatic stress disorder (PTSD) and substance use disorders (SUDs) represent major public health concerns, particularly among veterans. They are associated with significant distress and impairment, and are highly comorbid. Little is known, however, about what role the temporal order of diagnostic onset may play in severity of presenting symptomatology and treatment outcomes. The aim of this study, therefore, was to examine treatment outcomes by order of onset.

METHOD

Participants were 46 U.S. military veterans (91.3% male) enrolled in a larger randomized controlled trial examining the efficacy of an integrated, exposure-based treatment (Concurrent Treatment of PTSD and Substance Use Disorders Using Prolonged Exposure; COPE). Participants were grouped into 2 categories: (a) primary PTSD (i.e., PTSD developed before the onset of SUD) or (b) primary SUD (i.e., SUD developed before the onset of PTSD).

RESULTS

No significant associations between order of onset and baseline symptomatology were observed. The findings revealed that participants with primary PTSD were significantly more likely than participants with primary SUD to report higher levels of PTSD symptoms at the end of treatment. However, there was no effect of order of onset on SUD outcomes.

CONCLUSIONS

The findings suggest that individuals with earlier PTSD onset are a particularly high-risk group in terms of their trauma-related symptoms. Implications for treatment of comorbid PTSD/SUD are discussed. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Genome-wide association study identifies glutamate ionotropic receptor GRIA4 as a risk gene for comorbid nicotine dependence and major depression

Smoking and major depression frequently co-occur, at least in part due to shared genetic risk. However, the nature of the shared genetic basis is poorly understood. To detect genetic risk variants for comorbid nicotine dependence (ND) and major depression (MD), we conducted genome-wide association study (GWAS) in two samples of African-American participants (Yale-Penn 1 and 2) using linear mixed model, followed by meta-analysis. 3724 nicotine-exposed subjects were analyzed: 2596 from Yale-Penn-1 and 1128 from Yale-Penn-2. Continuous measures (Fagerström Test for Nicotine Dependence (FTND) scores and DSM-IV MD criteria) rather than disorder status were used to maximize the power of the GWAS. Genotypes were ascertained using the Illumina HumanOmni1-Quad array (Yale-Penn-1 sample) or the Illumina HumanCore Exome array (Yale-Penn-2 sample), followed by imputation based on the 1000 Genomes reference panel. An intronic variant at the GRIA4 locus, rs68081839, was significantly associated with ND-MD comorbidity (β = 0.69 [95% CI, 0.43-0.89], P = 1.53 × 10-8). GRIA4 encodes an AMPA-sensitive glutamate receptor that mediates fast excitatory synaptic transmission and neuroplasticity. Conditional analyses revealed that the association was explained jointly by both traits. Enrichment analysis showed that the top risk genes and genes co-expressed with GRIA4 are enriched in cell adhesion, calcium ion binding, and synapses. They also have enriched expression in the brain and they have been implicated in the risk for other neuropsychiatric disorders. Further research is needed to determine the replicability of these findings and to identify the biological mechanisms through which genetic risk for each condition is conveyed.

Prospective risk factors for post-deployment heavy drinking and alcohol or substance use disorder among US Army soldiers

BACKGROUND

Investigations of drinking behavior across military deployment cycles are scarce, and few prospective studies have examined risk factors for post-deployment alcohol misuse.

METHODS

Prevalence of alcohol misuse was estimated among 4645 US Army soldiers who participated in a longitudinal survey. Assessment occurred 1-2 months before soldiers deployed to Afghanistan in 2012 (T0), upon their return to the USA (T1), 3 months later (T2), and 9 months later (T3). Weights-adjusted logistic regression was used to evaluate associations of hypothesized risk factors with post-deployment incidence and persistence of heavy drinking (HD) (consuming 5 + alcoholic drinks at least 1-2×/week) and alcohol or substance use disorder (AUD/SUD).

RESULTS

Prevalence of past-month HD at T0, T2, and T3 was 23.3% (s.e. = 0.7%), 26.1% (s.e. = 0.8%), and 22.3% (s.e. = 0.7%); corresponding estimates for any binge drinking (BD) were 52.5% (s.e. = 1.0%), 52.5% (s.e. = 1.0%), and 41.3% (s.e. = 0.9%). Greater personal life stress during deployment (e.g., relationship, family, or financial problems) - but not combat stress - was associated with new onset of HD at T2 [per standard score increase: adjusted odds ratio (AOR) = 1.20, 95% CI 1.06-1.35, p = 0.003]; incidence of AUD/SUD at T2 (AOR = 1.54, 95% CI 1.25-1.89, p < 0.0005); and persistence of AUD/SUD at T2 and T3 (AOR = 1.30, 95% CI 1.08-1.56, p = 0.005). Any BD pre-deployment was associated with post-deployment onset of HD (AOR = 3.21, 95% CI 2.57-4.02, p < 0.0005) and AUD/SUD (AOR = 1.85, 95% CI 1.27-2.70, p = 0.001).

CONCLUSIONS

Alcohol misuse is common during the months preceding and following deployment. Timely intervention aimed at alleviating/managing personal stressors or curbing risky drinking might reduce risk of alcohol-related problems post-deployment.

Trauma exposure interacts with the genetic risk of bipolar disorder in alcohol misuse of US soldiers

OBJECTIVE

To investigate whether trauma exposure moderates the genetic correlation between substance use disorders and psychiatric disorders, we tested whether trauma exposure modifies the association of genetic risks for mental disorders with alcohol misuse and nicotine dependence (ND) symptoms.

METHODS

High-resolution polygenic risk scores (PRSs) were calculated for 10 732 US Army soldiers (8346 trauma-exposed and 2386 trauma-unexposed) based on genome-wide association studies of bipolar disorder (BD), major depressive disorder, and schizophrenia.

RESULTS

The main finding was a significant BD PRS-by-trauma interaction with respect to alcohol misuse (P = 6.07 × 10^-3 ). We observed a positive correlation between BD PRS and alcohol misuse in trauma-exposed soldiers (r = 0.029, P = 7.5 × 10^-3 ) and a negative correlation in trauma-unexposed soldiers (r = -0.071, P = 5.61 × 10^-4 ). Consistent (nominally significant) result with concordant effect, directions were observed in the schizophrenia PRS-by-trauma interaction analysis. The variants included in the BD PRS-by-trauma interaction showed significant enrichments for gene ontologies related to high voltage-gated calcium channel activity (GO:0008331, P = 1.51 × 10^-5 ; GO:1990454, P = 4.49 × 10^-6 ; GO:0030315, P = 2.07 × 10^-6 ) and for Beta1/Beta2 adrenergic receptor signaling pathways (P = 2.61 × 10^-4 ).

CONCLUSIONS

These results indicate that the genetic overlap between alcohol misuse and BD is significantly moderated by trauma exposure. This provides molecular insight into the complex mechanisms that link substance abuse, psychiatric disorders, and trauma exposure.

Deployment-Related Military Sexual Trauma Predicts Heavy Drinking and Alcohol Problems Among Male Reserve and National Guard Soldiers

BACKGROUND

Military sexual trauma (MST) is associated with a range of deleterious mental and physical health consequences; however, far less attention has been paid to the associations between MST and negative health behaviors, such as substance abuse. This study examined 2 focal research questions: (i) What is the prevalence of experiencing MST during deployment among male Reserve and National Guard soldiers? and (ii) to what extent is the degree of MST exposure during deployment associated with frequent heavy drinking and alcohol problems postdeployment?

METHODS

Data from male soldiers who had been deployed (N = 248) were drawn from the baseline wave of Operation: SAFETY (Soldiers And Families Excelling Through the Years) an ongoing study examining health among U.S. Army Reserve and National Guard and their partners. Participants were recruited over a 15-month period (Summer 2014 to Fall 2015) from units in New York State. Deployments occurred prior to the baseline wave of the study. Analyses examined the relation between degree of MST exposure during soldiers' most recent deployment and (i) frequent heavy drinking and (ii) alcohol problems, measured at baseline, controlling for posttraumatic stress disorder symptoms and age.

RESULTS

17.3% of the male service members reported experiencing MST during their most recent deployment. Further, greater MST exposure was associated with a greater likelihood of engaging in frequent heavy drinking (adjusted risk ratio [aRR] = 1.03, 95% CI [1.01, 1.05]) and experiencing alcohol problems (aRR = 1.03, 95% CI [1.01, 1.06]) at baseline.

CONCLUSIONS

Findings demonstrate that MST rates are high among male Reserve and National Guard soldiers, and greater MST exposure is associated with an increased likelihood of engaging in frequent heavy drinking and experiencing alcohol problems among a population already at risk for problematic alcohol use.