Examining the link between prior suicidality and subsequent suicidal ideation among high-risk US military service members.

BACKGROUND: Research is needed to identify the factors that explain the link between prior and future suicidality. This study evaluated possible mediators of the relationship between: (1) the severity of prior suicidality and (2) suicidal ideation severity at 3-month follow-up among a sample of high-risk military personnel. METHODS: US military service members referred to or seeking care for suicide risk (N = 624) completed self-report psychiatric domain measures and a clinician interview assessing prior suicidality severity at baseline. Three months later, participants completed a self-report measure of suicidal ideation severity. Three separate percentile bootstrap mediation models were used to examine psychiatric factors (i.e. alcohol abuse, anxiety sensitivity, hopelessness, insomnia, posttraumatic stress symptoms, suicidal ideation, and thwarted belongingness) as parallel mediators of the relationship between prior suicidality severity (specifically, suicidal ideation, suicide attempt, and overall suicidality - i.e. ideation/attempt severity combined) at baseline and suicidal ideation severity at follow-up. RESULTS: Hopelessness, specifically, and the total effect of all mediators, each significantly accounted for the relationship between prior suicidality severity and subsequent ideation severity across models. In the models with attempt severity and overall suicidality severity as predictors, thwarted belongingness was also a significant mediator. CONCLUSIONS: Hopelessness, thwarted belongingness, and overall severity of psychiatric indices may explain the relationship between prior suicidality severity and future suicidal ideation severity among service members at elevated suicide risk. Research is needed to replicate these findings and examine other possible mediators.

Investigating the reliability of suicide attempt history reporting across five measures: A study of US military service members at risk of suicide.

OBJECTIVE: Utilizing a sample of military service members at risk of suicide, this study aimed to: (a) identify patterns of suicide attempt (SA) history reporting across five measures and (b) evaluate whether consistent SA reporters (i.e., individuals who consistently report an SA history across measures) differ from inconsistent SA reporters on other clinical severity indices. METHOD: Participants (N = 984) completed five validated SA history measures and self-report psychiatric symptom measures. RESULTS: Of the sample, 35.4% inconsistently responded to SA history measures. Inconsistent reporters disclosed more severe suicide threat histories than consistent reporters. On all other clinical severity indices, inconsistent reporters evinced either less severe or comparable symptom levels. CONCLUSIONS: A nontrivial portion of service members may respond inconsistently to different assessments of SA history. Research is needed to identify factors that account for inconsistent SA history reporting and to improve the accuracy of SA history assessments among military personnel.

Military Suicide Research Consortium common data elements: Bifactor analysis and longitudinal predictive ability of suicidal ideation and suicide attempts within a clinical sample.

To enhance and standardize the assessment of suicidal self-directed violence (SDV) in military populations, the Military Suicide Research Consortium developed the Common Data Elements (CDEs). Previous research supported the CDEs as assessing a higher-order factor of suicidal SDV in military populations. The present study had two aims: 1) confirm the bifactor structure of the CDEs in a high-risk sample, and 2) assess the ability of the factorially derived suicidal SDV factor to predict suicide attempts and return to care for suicidal ideation over 3-month follow-up. Utilizing a sample of service members referred for a psychiatric evaluation (N = 1,044), the CDE structure was assessed with confirmatory bifactor modeling. Logistic regressions and receiver operating characteristic (ROC) analyses were used to assess the suicidal SDV risk factor's prediction of suicide attempts and return to care for suicidal ideation during follow-up (n = 758). Bifactor modeling suggested adequate fit for the overarching suicidal SDV risk factor. Logistic regressions supported the overarching suicidal SDV risk factor as a predictor of suicide attempts (OR = 4.07, p < .001) and return to care for suicidal ideation (OR = 2.81, p < .001) over follow-up. However, ROC analyses suggested that the model including the suicidal SDV risk factor was only significantly better at classifying suicide attempts over follow-up (not return to care for suicidal ideation) than the model that did not include it (AUC difference = 0.15, p < .001). Findings suggest that the shared variance assessed across CDEs better predicts future suicide attempts beyond any individual suicide-related constructs. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

The Relationship between Suicidal Responses and Traumatic Brain Injury and Severe Insomnia in Active Duty, Veteran, and Civilian Populations.

This study examined how a positive traumatic brain injury (TBI) screening and insomnia severity relate to suicidal outcomes across active duty, veteran, and civilian samples. Data were used from 3,993 participants from 19 studies. We conducted a series of analyses by group to identify which significantly differed on the variables of interest. TBI and insomnia each had independent relationships with outcomes over and above the impact of the other factor. Veterans presented as clinically worse across the outcomes. However, the relationship between insomnia and suicidal responses was stronger for active duty military compared to veterans. Continued research on TBIs and insomnia severity across groups will improve quality of care for those at risk of suicide.

PTSD symptom clusters and suicide attempts among high-risk military service members: A three-month prospective investigation.

OBJECTIVE: Suicide rates within the U.S. military are elevated, and the assessment and treatment of posttraumatic stress disorder (PTSD) has been identified as one potential conduit for suicide risk reduction. Despite increased interest in examining whether PTSD symptom clusters differentially predict suicide-related outcomes, to our knowledge no study has examined this question utilizing a prospective design for which suicide attempts is the outcome. Thus, the present study assessed whether PTSD symptom clusters differentially predict suicide attempts at 3-month follow-up and examined the moderating role of combat exposure. METHOD: Participants were 758 military service members referred for psychiatric evaluation for suicide-related concerns and who provided both baseline and follow-up data (76.8% male, Mage = 25.20 y [SDage = 6.22 y], 61.6% White/Caucasian, 28.2% combat-exposed). Baseline PTSD symptom clusters scores were derived from an abbreviated version of the PTSD Checklist-Military Version (PCL-M). Suicide attempts occurring from baseline to follow-up were assessed with the Suicide Attempt Self-Injury Interview (SASII). Logistic regression models were utilized, controlling for baseline suicide risk severity (i.e., frequency of suicidal ideation, levels of suicidal intent, past suicide plans and attempts) and sociodemographic characteristics. RESULTS: The hyperarousal symptom cluster was the only significant predictor of subsequent suicide attempts and, moreover, this association was significant for combat-exposed service members but not for non-combat-exposed service members. CONCLUSIONS: PTSD hyperarousal symptoms, characterized in part by overarousal (e.g., agitation), should be considered in military suicide risk assessment and prevention efforts, particularly for combat-exposed service members. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Response to commentary on "The modal suicide decedent did not consume alcohol just prior to the time of death: An analysis with implications for understanding suicidal behavior".

A commentary on our article, "The Modal Suicide Decedent Did Not Consume Alcohol Just Prior to the Time of Death: An Analysis with Implications for Understanding Suicidal Behavior," published in this issue, was reviewed. We agree with the authors of that commentary regarding a coding error that has now been corrected. While we disagree with several of the points raised by the authors, the majority of our disagreements lie in how the results of our original study are being interpreted. We provide a point-by-point response to that commentary and thank the authors for advancing scientific debate on what we view as a very important issue in understanding the role of alcohol as a risk factor for suicide.

The modal suicide decedent did not consume alcohol just prior to the time of death: An analysis with implications for understanding suicidal behavior.

We identified and analyzed a total of 92 studies, representing 167,894 suicide decedents, to determine if there is evidence to support what appears to be a widely held cultural, clinical, and scholarly view that many people who die by suicide had been drinking at the time of death. It was determined that, based on weighted averages, approximately 27% of suicide decedents had above-zero blood alcohol concentrations (BACs) at the time of death. We emphasize that it was not 27% who were intoxicated at the time of death; rather, 27% had above-zero BACs and 73% had BACs of 0.00%. Among studies of suicide decedents, BACs differed as a function of race (higher in non-White individuals). We conclude that the role of alcohol use at the time of death may be less than some assume, and this interpretation can inform clinical practice and theories of suicide. Important unanswered questions are posed which will help refine research in this area going forward.

Suicide risk among lesbian, gay, bisexual, and transgender military personnel and veterans: what does the literature tell us?

Research suggests that both the military and veteran and the lesbian, gay, bisexual, and transgender (LGBT) populations may be at increased risk for suicide. A literature review was conducted to identify research related to suicide risk in the LGBT military and veteran populations. Despite the paucity of research directly addressing this issue, themes are discussed evident in the literature on LGBT identity and suicide risk as well as LGBT military service members and veterans. Factors such as social support and victimization appear to be particularly relevant. Suggestions are made with respect to future research that is needed on this very important and timely topic.