Comorbid PTSD and Depression Diagnoses Mediate the Association of Military Sexual Trauma and Suicide and Intentional Self-Inflicted Injury in VHA-Enrolled Iraq/Afghanistan Veterans, 2004-2014.

Exposure to military sexual trauma (MST) in veterans is associated with suicidal ideation. Previous research suggests there are mechanisms of this association, including posttraumatic stress disorder (PTSD) and depression. Research has yet to examine whether comorbid PTSD and depression mediate the association of MST and suicide and intentional self-inflicted injury, and whether this comorbidity confers a greater risk for suicide relative to PTSD-only and depression-only. The current study addressed this gap in our knowledge. Screening results identifying MST exposure, PTSD and depression diagnoses, suicide and intentional self-inflicted injury, and demographic covariates in 435,690 Iraq/Afghanistan veterans were extracted from Veterans Health Administration (VHA) medical records. Veterans were included if they attended VHA from 2004-2014. Mediation was tested with path analyses. Suicide and intentional self-inflicted injury was observed in 16,149 (3.71%) veterans. The indirect effect of suicide and intentional self-inflicted injury, given a positive screen for MST, was highest among veterans with comorbid PTSD and depression diagnoses (indirect effect=3.18%, 95% confidence interval [CI] [3.01%, 3.32%]), with smaller probabilities observed for both PTSD-only (indirect effect=-0.18%, 95% CI [-0.20%, -0.14%]) and depression-only (indirect effect=0.56%, 95% CI [0.51%, 0.62%]; ps<.05). Data were limited to VHA-enrolled Iraq/Afghanistan veterans. To reduce suicide risk among veterans with a history of MST, treatments may be most effective if they target comorbid PTSD and depression. Future research should examine the mechanisms through which comorbid PTSD and depression result in heightened risk for suicide and intentional self-inflicted injury.

Livingston WS ，Fargo JD ，Gundlapalli AV ，Brignone E ，Blais RK ... -  《-》

Gender moderates the association of military sexual trauma and risk for psychological distress among VA-enrolled veterans.

Military sexual trauma (MST) is associated with increased risk for posttraumatic stress disorder (PTSD) and depression diagnoses, as well as suicidal ideation/behavior (SI/B). Little is known about the differential effect of gender on the association of MST and the aforementioned mental health outcomes. As females are the fastest growing subpopulation of the Veterans Health Administration (VHA), it is imperative to assess possible between-gender differences in the association of MST with PTSD, depression, and SI/B. Participants were 435,690 (n = 382,021, 87.7% men) 9/11 era veterans seen for care at the VHA between 2004 and 2014. Demographics, gender, PTSD and depression diagnoses, SI/B, and MST screen status were extracted from medical records. Adjusted logistic regression models assessed the moderating effect of gender on the association of MST with PTSD and depression diagnoses, as well as SI/B. Women with MST had a larger increased risk for a PTSD diagnosis (predicted probability =0.56, 95% confidence interval [CI] [0.56, 0.56]) and comparable risk for a depression diagnosis (predicted probability = 0.63, 95% CI [0.63, 0.64]) compared to men with MST. Men were more likely to have evidence of SI/B (predicted probability = 1.07, 95% CI [0.10, 0.11]) relative to women, but the interaction between gender and MST was nonsignificant. Data were limited to veterans seeking care through VHA and the MST screen did not account for MST severity. Non-VHA settings may consider screening for MST in both men and women, given that risk for PTSD and depression is heightened among female survivors of MST.

Tannahill HS ，Livingston WS ，Fargo JD ，Brignone E ，Gundlapalli AV ，Blais RK ... -  《-》

Examination of the indirect effects of combat exposure on suicidal behavior in veterans.

Researchers have theorized that increased rates of suicide in the military are associated with combat exposure; however, this hypothesis has received inconsistent support in the literature, potentially because combat exposure may be indirectly related to suicide risk through its influence on posttraumatic stress disorder (PTSD) and depressive symptoms. The current study tested the hypothesis that combat exposure has a significant indirect effect on suicidal behavior among Iraq/Afghanistan-era veterans through its effects on PTSD-depressive symptomatology. Iraq/Afghanistan-era veterans (N = 3,238) participated in a cross-sectional, multi-site study of post-deployment mental health consisting of clinical interviews and self-report questionnaires. Structural equation modeling (SEM) was used to examine direct and indirect relationships between three latent variables: combat exposure, PTSD-depression, and suicidal behavior (past attempts and current ideation, intent, and preparation). A partial mediation model was the best-fitting model for the data. Combat exposure was significantly associated with PTSD-depression (β = 0.50, p < .001), which was in turn associated with suicidal behavior (β = 0.62, p < .001). As expected, the indirect effect between combat exposure and suicidal behavior was statistically significant, β = 0.31, p < .001. Data were cross-sectional, and suicidal behavior was measured via self-report. Results indicated that combat exposure was indirectly related to suicidal behavior via PTSD-depressive symptomatology. Findings lend support for a higher-order combined PTSD-depression latent factor and suggest that Iraq/Afghanistan-era veterans with high levels of PTSD-depressive symptoms are at increased risk for suicidal behavior.

Dillon KH ，Cunningham KC ，Neal JM ，Wilson SM ，Dedert EA ，Elbogen EB ，Calhoun PS ，Beckham JC ，VA Mid-Atlantic MIRECC Workgroup ，Kimbrel NA ... -  《-》

The influence of depressive symptoms on suicidal ideation among U.S. Vietnam-era and Afghanistan/Iraq-era veterans with posttraumatic stress disorder.

Major depressive disorder (MDD) co-occurs frequently with posttraumatic stress disorder (PTSD), and both disorders are linked to suicidal ideation. An emergent literature examines suicidal ideation in U.S. Afghanistan/Iraq-era veterans. Little research, however, has studied the role of PTSD and comorbid MDD on suicidal ideation across service eras. Therefore, this study aimed to examine the impact of depression on suicidal ideation in Afghanistan/Iraq-era and Vietnam-era veterans with PTSD. The sample included 164 Vietnam and 98 Afghanistan/Iraq veterans diagnosed with PTSD at a VA outpatient PTSD Clinic. Using structured interviews, 63% of the Vietnam sample and 45% of the Afghanistan/Iraq sample were diagnosed with comorbid current MDD. Measures included self-report assessments of PTSD and depressive symptoms and the Personality Assessment Inventory. Results of analyses suggested that in veterans of both eras, PTSD, MDD, and their interaction were significantly related to suicidal ideation (PTSD: η(2) = .01; MDD: η(2) = .10; PTSD × MDD: η(2) = .02). For veterans reporting greater depressive symptoms, there was a stronger relationship between PTSD symptoms and suicidal ideation. These results suggest that veterans from both eras display a similar clinical presentation and highlight the need to consider depressive symptoms when assessing veterans with PTSD. Future research should examine suicidal ideation and behaviors as they change over time in these two cohorts.

Pukay-Martin ND ，Pontoski KE ，Maxwell MA ，Calhoun PS ，Dutton CE ，Clancy CP ，Hertzberg MA ，Collie CF ，Beckham JC ... -  《-》

Gender differences in military sexual trauma and mental health diagnoses among Iraq and Afghanistan veterans with posttraumatic stress disorder.

We examined correlates of posttraumatic stress disorder (PTSD), including military sexual trauma (MST), in Iraq and Afghanistan veterans. We also compared mental health comorbidities by gender among veterans with PTSD, with and without MST. Retrospective data analyses were conducted using Department of Veterans Affairs (VA) administrative data from 213,803 Iraq and Afghanistan veterans and the subset diagnosed with PTSD from April 1, 2002, to October 1, 2008. We used descriptive statistics and multivariate logistic regression compared by gender to investigate independent correlates and mental health comorbidities associated with PTSD, with and without MST. Among women with PTSD, 31% screened positive for MST; 1% of men with PTSD screened positive for MST. Among those with PTSD, veterans with MST had more comorbid mental health diagnoses than those without MST. Women with PTSD and MST were more likely to receive comorbid depression, anxiety, and eating disorder diagnoses, and men were more likely to receive comorbid substance use disorder diagnoses. MST is associated with an increased prevalence of mental health disorders comorbid with PTSD. Better understanding comorbidity patterns will allow for targeted evaluation and treatment of returning veterans with MST.

Maguen S ，Cohen B ，Ren L ，Bosch J ，Kimerling R ，Seal K ... -  《-》