Quantifying relational change in community organisations participating in a Veteran suicide prevention learning collaborative: a social network analysis.

BACKGROUND: Veteran suicide remains a significant issue, as 17.5 Veterans die by suicide each day. The US Department of Veteran Affairs (VA) has implemented a robust suicide prevention program within its integrated behavioural health system. Further, the VA has increasingly contributed to suicide prevention in community settings, where a large proportion of Veterans receive health care and social services. One component integral to preventing suicide among Veterans receiving community services is ensuring that organisations are equipped with the latest evidence-based Veteran-specific suicide prevention strategies. METHODS: The Patient Safety Center of Inquiry-Suicide Prevention Collaborative piloted a Veteran suicide prevention learning collaborative in the Denver/Colorado Springs, CO region, spanning 16 months as a multimodal initiative to integrate community organisations and assist them in implementing Veteran suicide prevention strategies used within VA. Agencies completed social network analysis surveys at baseline (T1), year 1 (T2) and 16 months (T3) to examine social networks, partnerships and collaborations among community organisations and the VA over time. RESULTS: The quantity of learning collaborative relationships increased from 30 at T1 to 41 at T3 while the quality of relationships deepened over time from awareness and cooperative to more coordinated and integrated. CONCLUSION: Improvement in relationship quantity and quality facilitates community organisation engagement in collaborating to strengthen their Veteran suicide prevention programming. Learning collaboratives work with the individual organisation for intraorganisational facilitation of implementing suicide prevention strategies and engage and enhance interorganisational partnerships. This multimodal intervention can engage community organisations and provide a stronger safety net for Veterans at risk for suicide.

Are We Undercounting the True Burden of Mortality Related to Suicide, Alcohol Use, or Drug Use? An Analysis Using Death Certificate Data From Colorado Veterans.

Knowledge regarding deaths due to suicide or alcohol- or drug-related causes may be limited by inconsistent and/or restrictive case definitions, resulting in concerns regarding validity of findings and underestimates of burden. In this proof-of-concept study, we assessed varying case definitions (suicide, alcohol-related, and drug-related mortality using underlying-cause-of-death (UCOD) versus multiple-cause-of-death (MCOD) International Classification of Diseases, Tenth Revision (ICD-10) codes) on the basis of counts and rates among Colorado veterans who died (2009-2020). Suicide, alcohol-related, or drug-related ICD-10 codes were identified, and 2 case definitions were compared: UCOD (qualifying ICD-10 code listed as the UCOD) and MCOD (qualifying ICD-10 code in any cause-of-death field). Of 109,314 decedents, the number of deaths and the age-adjusted mortality rate (per 100,000 persons) significantly increased when MCOD codes were included: n = 4,930 (110.3 deaths/100,000 persons) for UCOD versus n = 6,954 (138.4 deaths/100,000 persons) for MCOD. While rates of suicide mortality did not change, rates of alcohol-related mortality doubled with the more inclusive case definition: 1,752 (27.3 deaths/100,000 persons) for UCOD versus 3,847 (59.8 deaths/100,000 persons) for MCOD. Alcohol-use disorder codes accounted for 71% of additional alcohol-related deaths captured with the MCOD definition. Studies that rely on UCOD codes may be underestimating the burden of deaths, especially alcohol-related deaths. Increased effort is required to reevaluate current classifications of deaths associated with suicide, alcohol use, or drug use.

Moral injury and peri- and post-military suicide attempts among post-9/11 veterans.

BACKGROUND: Our goal was to examine the association between moral injury, mental health, and suicide attempts during military service and after separation by gender in post-9/11 veterans. METHODS: A nationally representative sample of 14057 veterans completed a cross-sectional survey. To examine associations of exposure to potentially morally injurious events (PMIEs; witnessing, perpetrating, and betrayal) and suicidal self-directed violence, we estimated two series of multivariable logistic regressions stratified by gender, with peri- and post-military suicide attempt as the dependent variables. RESULTS: PMIE exposure accounted for additional risk of suicide attempt during and after military service after controlling for demographic and military characteristics, current mental health status, and pre-military history of suicidal ideation and attempt. Men who endorsed PMIE exposure by perpetration were 50% more likely to attempt suicide during service and twice as likely to attempt suicide after separating from service. Men who endorsed betrayal were nearly twice as likely to attempt suicide during service; however, this association attenuated to non-significance after separation in the fully adjusted models. In contrast, women who endorsed betrayal were over 50% more likely to attempt suicide during service and after separation; PMIE exposure by perpetration did not significantly predict suicide attempts before or after service among women in the fully adjusted models. CONCLUSIONS: Our findings indicate that suicide assessment and prevention programs should consider the impact of moral injury and attend to gender differences in this risk factor in order to provide the most comprehensive care.

Racial and Ethnic Differences in Deaths by Suicide, Drug Overdose, and Opioid-Related Overdose in a National Sample of Military Members With Mild Traumatic Brain Injury, 1999-2019.

OBJECTIVE: To examine racial and ethnic differences in suicide and drug and opioid-related overdose deaths among a population-based cohort of military service members who were diagnosed with a mild traumatic brain injury (mTBI) during military service. DESIGN: Retrospective cohort. SETTING: Military personnel receiving care within the Military Health System between 1999 and 2019. PARTICIPANTS: In total, 356 514 military members aged 18 to 64 years, who received an mTBI diagnosis as their index TBI between 1999 and 2019, while on active duty or activated. MAIN MEASURES: Death by suicide, death by drug overdose, and death by opioid overdose were identified using International Classification of Diseases, Tenth Revision (ICD-10) codes within the National Death Index. Race and ethnicity were captured from the Military Health System Data Repository. RESULTS: Overall crude rates were 38.67 per 100 000 person-years for suicide; 31.01 per 100 000 person-years for drug overdose death; and 20.82 per 100 000 person-years for opioid overdose death. Crude and age-specific rates for military members who self-identified as Other were higher than all other racial/ethnic groups for all 3 mortality outcomes. Adjusting for age, suicide rates for those classified as Other were up to 5 times that of other racial/ethnic groups for suicide, and up to 11 and 3.5 times that of other race/ethnicity groups for drug and opioid overdose death, respectively. CONCLUSION: Findings extend previous knowledge regarding risk for suicide and deaths by drug overdose among those with mTBI and highlight new important areas for understanding the impact of race and ethnicity on mortality. Methodological limitations regarding classification of race and ethnicity must be addressed to ensure that future research provides a better understanding of racial and ethnic disparities in suicide and drug overdose mortality among military members with TBI.

Relationship of social determinants of health with symptom severity among Veterans and non-Veterans with probable posttraumatic stress disorder or depression.

PURPOSE: Social determinants of health (SDoH) refer to the conditions in the environments in which people live that affect health outcomes and risks. SDoH may provide proximal, actionable targets for interventions. This study examined how SDoH are associated with posttraumatic stress disorder (PTSD) and depression symptoms among Veterans and non-Veterans with probable PTSD or depression. METHODS: Four multiple regressions were conducted. Two multiple regressions with Veterans examined the impact of SDoH on PTSD symptoms and on depression symptoms. Two multiple regressions with non-Veterans examined the impact of SDoH on PTSD symptoms and on depression symptoms. Independent variables included demographic characteristics, adverse experiences (in childhood and adulthood), and SDoH (discrimination, education, employment, economic instability, homelessness, justice involvement, and social support). Correlates that were statistically significant (p < 0.05) and clinically meaningful (rpart >|0.10|) were interpreted. RESULTS: For Veterans, lower social support (rpart = - 0.14) and unemployment (rpart = 0.12) were associated with greater PTSD symptoms. Among non-Veterans, greater economic instability (rpart = 0.19) was associated with greater PTSD symptoms. In the depression models, lower social support (rpart = - 0.23) and greater economic instability (rpart = 0.12) were associated with greater depression for Veterans, while only lower social support was associated with greater depression for non-Veterans (rpart = - 0.14). CONCLUSION: Among Veterans and non-Veterans with probable PTSD or depression, SDoH were associated with PTSD and depression symptoms, particularly social support, economic instability, and employment. Beyond direct treatment of mental health symptoms, addressing social support and economic factors such as instability and employment in the context of PTSD and depression are potential intervention targets that would benefit from future research.

Informing measurement of gender differences in suicide risk and resilience: A national study of United States military veterans.

OBJECTIVE: To inform measure selection when examining gender differences in suicide risk, this paper evaluates measure performance for a set of gender-relevant constructs and examines gender differences in mean scores. METHODS: A national sample of veterans (n = 968) who had recently attempted suicide (past 6 months) completed measures assessing life experience-, psychosocial-, and health-related constructs. A multigroup latent variable model was used to assess similarity of measurement properties between women and men. RESULTS: Metric and scalar invariance indicated that the latent variables functioned similarly between women and men. Women had higher scores on negative coping, institutional betrayal, and social rejection; men had higher scores on self-compassion, autonomy, and suicide ideation. CONCLUSIONS: Measurement properties and gender differences in mean values support the use of these measures for research on gender differences. Findings also suggest further investigation of social rejection, institutional betrayal, and negative coping among women veterans at risk for suicide.

Suicide Among American Indian and Alaska Native Veterans Who Use Veterans Health Administration Care: 2004-2018.

BACKGROUND: American Indian and Alaska Natives (AI/ANs) veterans may be at elevated risk for suicide, but little is known about suicide among this population. METHODS: We conducted a retrospective cohort analysis of AI/AN veterans who received health care services provided or paid for by the Veterans Health Administration (VHA) between October 1, 2002, and September 30, 2014, and who were alive as of September 30, 2003. Age-specific and age-adjusted suicide rates through 2018, per 100,000 person-years (PY) at risk and 95% confidence intervals were computed. RESULTS: Age-adjusted suicide rates among AI/AN veterans in this cohort more than doubled (19.1-47.0/100,000 PY) over the 15-year observation period. In the most recent observation period (2014-2018), the age-adjusted suicide rate was 47.0 per 100,000 PY, with the youngest age group (18-39) exhibiting the highest suicide rate (66.0/100,000 PY). The most frequently used lethal means was firearms (58.8%), followed by suffocation (19.3%), poisoning (17.2%), and other (4.7%). CONCLUSIONS: Results suggest that: (1) suicide is an increasing problem among AI/AN VHA veterans; and (2) younger AI/AN VHA veterans are at particularly high risk and warrant focused prevention efforts. Findings are similar to those observed in general AI/AN population. There is a compelling need to review and strengthen VHA suicide prevention efforts directed towards AI/AN veterans.

Prevalence and Correlates of Firearm Access Among Post-9/11 US Women Veterans Using Reproductive Healthcare: a Cross-Sectional Survey.

BACKGROUND: Suicide rates have increased among women Veterans, with increased use of firearms as the method. Addressing suicide risk in this population requires understanding the prevalence and correlates of firearm access in healthcare settings frequented by women Veterans. OBJECTIVES: Characterize the prevalence and correlates of firearm ownership and storage practices among women Veterans using Department of Veterans Affairs (VA) reproductive healthcare (RHC) services. DESIGN: Cross-sectional national survey conducted in 2018-2019 (17.9% response rate). PARTICIPANTS: Post-9/11 women Veterans using RHC (n=350). MAIN MEASURES: VA Military Sexual Trauma Screen, PTSD Checklist for DSM-5, Hurt/Insult/Threaten/Scream, Columbia-Suicide Severity Rating Scale screener, self-reported firearm access. KEY RESULTS: 38.0% (95% confidence interval [95% CI]: 32.9, 43.3) of participants reported personally owning firearms, and 38.9% (95% CI: 33.7, 44.2) reported other household members owned firearms. Among those with firearms in or around their homes, 17.8% (95% CI: 12.3, 24.4) and 21.9% (95% CI: 15.9, 28.9) reported all were unsafely stored (loaded or unlocked, respectively). Women who experienced recent intimate partner violence were less likely to report personally owning firearms (adjusted prevalence ratio [APR]=0.75; 95% CI: 0.57, 0.996). Those who experienced military sexual harassment (APR=1.46; 95% CI=1.09, 1.96), were married (APR=1.74; 95% CI: 1.33, 2.27), or lived with other adult(s) (APR=6.26; 95% CI: 2.87, 13.63) were more likely to report having household firearms owned by someone else. Storing firearms loaded was more prevalent among women with lifetime (APR=1.47; 95% CI=1.03, 2.08) or past-month (APR=1.69; 95% CI=1.15, 2.48) suicidal ideation and less likely among those with other adult(s) in the home (unadjusted PR=0.62; 95% CI=0.43, 0.91). Those with parenting responsibilities (APR=0.61; 95% CI=0.38, 0.97) were less likely to store firearms unlocked. CONCLUSIONS: Firearm access is prevalent among post-9/11 women Veterans using VA RHC. Interpersonal factors may be important determinants of firearm access in this population. Safe firearm storage initiatives are needed among women Veterans using RHC, particularly for those with suicidal ideation.

Female Veterans' Willingness to Seek Veterans Health Administration and Non-Veterans Health Administration Services for Suicidal Thoughts and Mental Health Concerns.

BACKGROUND: The extent to which female veterans are willing to seek Veterans Health Administration (VHA) and non-VHA care when they are suicidal or experiencing mental health (MH) concerns is unknown. OBJECTIVES: The objectives of this study were to: (1) examine whether current, past, and never VHA using female veterans' willingness to seek VHA care differs from their willingness to seek non-VHA care if suicidal or experiencing MH symptoms; (2) examine if VHA use, military sexual trauma, and suicidal ideation and attempt are associated with female veterans' willingness to use VHA and non-VHA care when experiencing suicidal thoughts or MH symptoms. RESEARCH DESIGN: A cross-sectional anonymous survey. SUBJECTS: Four hundred thirty nine female veterans, including current, past, and never VHA users were included. MEASURES: General Help-Seeking Questionnaire, Self-Injurious Thoughts and Behaviors Interview, and the VA Military Sexual Trauma Screening Questions. RESULTS: Current VHA users reported more willingness to use VHA than non-VHA care; conversely, past and never VHA users reported less willingness to use VHA care relative to non-VHA care. Military sexual assault and none or past VHA use were associated with lower willingness to use VHA care if suicidal or experiencing MH symptoms. In contrast, those with none or past VHA use reported greater willingness to use non-VHA care if suicidal or experiencing MH symptoms, while prior suicide attempt was associated with lower willingness. CONCLUSIONS: Ensuring that acceptable and effective suicide prevention services are available to female veterans in both VHA and community settings is critical. Increasing help-seeking intentions among female veterans who have attempted suicide or experienced military sexual assault is also essential.

Accelerating Research on Suicide Risk and Prevention in Women Veterans Through Research-Operations Partnerships.

BACKGROUND: Suicide rates for women veterans are increasing faster than for nonveterans. The 2017 suicide rate for women veterans was more than double that for women nonveterans. However, research to inform improved suicide prevention for women veterans is scant. OBJECTIVES: To accelerate research on women veterans' unique risks and resiliencies for suicide, the Department of Veterans Affairs (VA) Women's Health Research Network launched a Women Veterans Suicide Prevention Research Work Group to target technical support for researchers, promote collaboration with national VA program offices, and ultimately increase dissemination and translation of research into clinical practice, public health strategies, and policies. The objective of this paper is to report on the process and outcomes of the Work Group's strategic planning efforts to identify and fill gaps in suicide prevention research among women veterans. METHODS: An in-person meeting of 20 researchers and operational leaders was convened to summarize existing research evidence and identify research priorities and challenges. RESULTS: Research priorities included civilian reintegration, community connections, psychosocial stressors (eg, social determinants of health) and trauma, risk assessment, clinical interventions, upstream prevention, and health care access. The importance of increasing evidence on gender differences and for women veterans not using VA health care was emphasized. CONCLUSIONS: Research to inform suicide prevention tailored to meet women veterans' needs is essential; however, many priorities and challenges remain unaddressed. Although Work Group efforts have achieved funding gains, further work to formalize, promote and meet the demands of a suicide prevention research agenda for women veterans requires is ongoing focus.

Gender Differences in Recovery Needs After a Suicide Attempt: A National Qualitative Study of US Military Veterans.

BACKGROUND: Appropriate after-care for the estimated 1.4 million people with nonfatal suicide attempts each year in the United States is critical, yet little research has focused on recovery needs after an attempt and whether important gender differences in those needs may exist. In this study, we examined gender differences in recovery needs after a suicide attempt among a national sample of women and men veterans. METHODS: We interviewed 25 women and 25 men veterans from Veterans Health Administration health care systems across the country. Purposive sampling was used to obtain a demographically and clinically diverse sample. Transcripts were analyzed using thematic analysis. RESULTS: Although some recovery topics were similar between genders, the participants' primary recovery needs, or goals, differed by gender. Women focused on developing connections with others and wanted to increase their self-knowledge and self-worth. Men were focused on trying to live up to their ideal selves by living and doing "right." Men also wanted to feel like they were needed by others. Both women and men also wanted to feel a stronger sense of purpose in their lives. CONCLUSIONS: Findings suggest that recovery needs among veterans after a nonfatal suicide attempt vary by gender: women may benefit more from psychoeducational approaches in group settings with other women, whereas men may benefit more from approaches that help them focus on making changes in their lives towards becoming their ideal selves.

Gender Differences in Lifetime Prevalence and Onset Timing of Suicidal Ideation and Suicide Attempt Among Post-9/11 Veterans and Nonveterans.

BACKGROUND: Rising US suicide rates are particularly notable among military veterans, especially women. It is unknown whether these differences extend to suicidal ideation (SI) and suicide attempts (SA), which are major predictors of suicide. Literature comparing SI and SA prevalence and timing of onset between veterans and nonveterans is limited. OBJECTIVE: The objective of this study was to estimate and compare SI and SA prevalence and onset timing relative to age and military service between veterans and nonveterans, by gender. RESEARCH DESIGN: Gender-stratified analysis of cross-sectional data from the Comparative Health Assessment Interview Study. Generalized estimating equations logistic regression was used to compare prevalence and onset of SI and SA between time periods and across groups, controlling for years at risk in each time period. SUBJECTS: National sample of 15,082 post-9/11 veterans (36.7% women) and 4638 nonveterans (30.5% women). MEASURES: Columbia-Suicide Severity Rating Scale adapted to assess SI and SA relative to age (less than 18 y, 18 y and above) and military service (pre-, during, and post-military). RESULTS: Veteran men experienced significantly higher odds of lifetime SI compared with nonveteran men (odds ratio=1.13), whereas veteran women experienced significantly higher odds of lifetime SA compared with nonveteran women (odds ratio=1.35). SI and SA onset varied considerably for veterans and nonveterans and by gender within veteran groups. CONCLUSIONS: Veterans and nonveterans appear to differ in periods of risk for SI and SA. Furthermore, gender differences in SI and SA onset for veterans highlight the need for gender-informed veteran suicide prevention strategies that target periods of highest risk.

Suicide among veterans with amyotrophic lateral sclerosis.

BACKGROUND: The purpose of this study was to estimate the risk of death by suicide for those with amyotrophic lateral sclerosis (ALS) seeking care within the Veterans Health Administration (VHA). METHODS: This was a retrospective, cohort study. Extended Cox regression models were used to compare the hazard of suicide between the ALS and the unexposed groups. RESULTS: The hazard of suicide was 3.98 times higher for those with ALS than for those without (95% confidence interval [CI] , 2.64-6.00; P < .0001). After adjusting for covariates, those with ALS remained at increased risk (hazard ratio, 3.48; 95% CI, 2.31-5.24; P < .001). CONCLUSIONS: Among those seeking care in the VHA, individuals with ALS are at increased risk for dying by suicide. Additional suicide prevention efforts, including strategies for reducing access to lethal means, are warranted.

Suicide After Stroke in the United States Veteran Health Administration Population.

OBJECTIVE: To evaluate risk for suicide among veterans with a history of stroke, seeking care within the Veterans Health Administration (VHA), we analyzed existing clinical data. DESIGN: This retrospective cohort study was approved and performed in accordance with the local Institutional Review Board. Veterans were identified via the VHA's Corporate Data Warehouse. Initial eligibility criteria included confirmed veteran status and at least 90 days of VHA utilization between fiscal years 2001-2015. Cox proportional hazards models were used to assess the association between history of stroke and suicide. Among those veterans who died by suicide, the association between history of stroke and method of suicide was also investigated. SETTING: VHA. PARTICIPANTS: Veterans with at least 90 days of VHA utilization between fiscal years 2001-2015 (N=1,647,671). Data from these 1,647,671 veterans were analyzed (1,405,762 without stroke and 241,909 with stroke). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Suicide and method of suicide. RESULTS: The fully adjusted model, which controlled for age, sex, mental health diagnoses, mild traumatic brain injury, and modified Charlson/Deyo Index (stroke-related diagnoses excluded), demonstrated a hazard ratio of 1.13 (95% confidence interval, 1.02-1.25; P=.02). The majority of suicides in both cohorts was by firearm, and a significantly larger proportion of suicides occurred by firearm in the group with stroke than the cohort without (81.2% vs 76.6%). CONCLUSIONS: Findings suggest that veterans with a history of stroke are at increased risk for suicide, specifically by firearm, compared with veterans without a history of stroke. Increased efforts are needed to address the mental health needs and lethal means safety of veterans with a history of stroke, with the goal of improving function and decreasing negative psychiatric outcomes, such as suicide.

Microbial Diversity and Community Structures Among Those With Moderate to Severe TBI: A United States-Veteran Microbiome Project Study.

OBJECTIVE: To evaluate the association between distal moderate/severe traumatic brain injury (TBI) history and the human gut microbiome. SETTING: Veterans Affairs Medical Center. PARTICIPANTS: Veterans from the United States-Veteran Microbiome Project (US-VMP). Veterans with moderate/severe TBI (n = 34) were compared with (1) Veterans with a history of no TBI (n = 79) and (2) Veterans with a history of no TBI or mild TBI only (n = 297). DESIGN: Microbiome analyses from 16S rRNA gene sequencing with gut microbiota function inferred using PICRUSt2. MAIN MEASURES: α-Diversity and ß-diversity of the gut microbiome, as well as taxonomic and functional signatures associated with moderate/severe TBI. RESULTS: There were no significant differences in gut bacterial α- and ß-diversity associated with moderate/severe TBI status. No differentially abundant taxa were identified when comparing samples from moderate/severe TBI to those with no TBI or no TBI/mild TBI. CONCLUSION: Results suggest that moderate/severe TBI-related changes to the gut microbiome do not persist for years postinjury.

Recruitment of women veterans into suicide prevention research: Improving response rates with enhanced recruitment materials and multiple survey modalities.

Women veterans (WV) are the fastest growing veteran subpopulation and recognized to be at increased risk for suicide compared with civilians. Improving engagement (e.g., response rates) of WV in survey research is critical to ensuring valid and generalizable findings, which can inform suicide prevention programs tailored for this population. Many factors are known to influence response rates, yet little is known about ways to optimize survey response rates among WV. Three recruitment cohorts (Waves 1 [W1], 2a [W2a], and 2b [W2b]) of WV were invited to participate in an online survey for a national, mixed-methods study examining suicide risk among WV using reproductive health care services paid for or provided by the Veterans Health Administration. To examine the effects of enhanced recruitment efforts, standard recruitment materials were mailed to all three cohorts, with the additions of: a study flyer aiming to build trust between participants and researchers (W2a, W2b) and a paper survey (W2b). Characteristics of responders and non-responders were compared by wave and across survey modalities. Response rates were significantly higher for groups receiving enhanced (W2a = 17.1%; W2b = 24.6%) versus standard (W1 = 12.2%) recruitment materials. WV residing in rural areas were significantly more likely to respond by paper (37.1%) than online (19.8%). Non-respondents were disproportionately racial and ethnic minorities. Disclosure of sensitive information (e.g., military sexual trauma) did not differ by survey modality. Findings suggest that enhanced recruitment materials improve survey response rates among WV, an important consideration for future research with this population.

Suicide and Traumatic Brain Injury Among Individuals Seeking Veterans Health Administration Services Between Fiscal Years 2006 and 2015.

OBJECTIVE: Examine associations between traumatic brain injury (TBI) and (1) suicide and (2) suicide method among individuals receiving Veterans Health Administration (VHA) care. SETTING: VHA, Fiscal Years 2006-2015. PARTICIPANTS: Veterans with a TBI diagnosis during/prior to the study window (n = 215 610), compared with a 20% random sample of those without TBI (n = 1 187 639). DESIGN: Retrospective, cohort study. Cox proportional hazards models were fit accounting for time-dependent measures, chronic conditions, and demographics for those with TBI compared with those without. Additional models evaluated the impact of TBI severity on the association between TBI and suicide, and method. MAIN OUTCOME MEASURES: Death by and method of suicide. RESULTS: The hazard of suicide was 2.19 times higher for those with TBI than for those without TBI (95% CI = 2.02-2.37), and was still significant after accounting for covariates (hazard ratio [HR] = 1.71; 95% confidence interval [CI] = 1.56-1.87). Considering severity, mild TBI compared with no TBI was significantly associated with an elevated hazard of suicide, after adjusting for covariates (HR = 1.62; 95% CI = 1.47-1.78). There was also a significant difference in death by suicide between moderate/severe TBI when compared with no TBI, after adjusting for covariates (HR = 2.45; 95% CI = 2.02-2.97). Moderate/severe TBI was significantly associated with an increase in the odds of suicide by firearm among decedents (odds ratio = 2.39; 95% CI = 1.48-3.87). CONCLUSION: Traumatic brain injury is associated with an elevated risk for suicide. Particular concern is warranted for those with moderate/severe TBI. Lethal means safety should be explored as an intervention.

A reconsideration of the correlation between veteran status and firearm suicide in the general population.

BACKGROUND: The relationship between veteran status and firearm suicide has been evaluated previously, but multiple sources of bias limit conclusions. This study aimed to clarify the relationship between a history of military service and firearm suicide. METHODS: Data obtained from suicide death certificates from nine states (1999-2009) were analysed. History of military service was validated using data obtained from the Department of Veterans Affairs and Department of Defense. Modified Poisson Regression with robust SEs was used to compute adjusted prevalence ratios for the common outcome of firearm use among suicide decedents. RESULTS: Male veteran suicide decedents were 6% more likely to use firearms, and female veteran suicide decedents were 18% more likely to use firearms compared with their non-veteran peers. CONCLUSIONS: Prior estimates based on logistic regression and death certificate reporting of veteran status may have overestimated the relationship between veteran status and firearm use among suicide decedents.