Suicide in the U.S. army: stressor-strain hypothesis among deployed and nondeployed Army National Guard soldiers
Authors: Griffith James 
Published: June 2015

Purpose
– Study samples, having responded to similar survey content, allowed examination of suicide risk factors for deployed soldiers relative to nondeployed or home station soldiers. Specific research questions addressed by this study are: First, what is the prevalence of suicidal behaviors among Army National Guard (ARNG) soldiers – deployed or not, and how do these rates compare with known US national and international rates? Second, what are stressful life events associated with suicidal risk? How do these compare between deployed and nondeployed soldiers? Third, what specifically about combat exposure makes soldiers at risk for suicide? And fourth, is there any evidence of stress-buffering effect between risk factors and suicidal behaviors? The paper aims to discuss these issues.

Design/methodology/approach
– Three data sources were used. First, the responding sample for the Unit Risk Inventory consisted of 180 company-sized units with a total of 12,567 responding soldiers. Second, the responding sample for the Unit Risk Inventory-Reintegration consisted of 50 company-sized units with a total of 4,567 soldiers. The third data source was all ARNG suicides for calendar years 2007 through 2012. For each calendar year, a random sample of 1,000 ARNG soldiers was drawn to represent nonsuicides. This resulted in a study sample size of 6,523, including the 523 suicides for the years 2007 through 2012 plus 1,000 nonsuicide cases for each calendar year.

Findings
– Prevalence of suicidal behaviors among soldiers was higher (for thoughts, plans, and attempts, respectively, 4-6, 1.3-2.2, and 0.7-0.08 percent) than among civilian populations (respectively, 2.6, 0.7, and 0.4 percent). Risk was highest among home station than deployed soldiers. Stressful life events associated with suicide risk included personal feelings of loneliness, anger, and frustration, followed by interpersonal behavioral problems, such as aggressive behavior toward a significant other and having committed a crime. Also evident are the beneficial effects (as a main effect and buffering effect) of feelings of cohesiveness, quality leaderships, and job satisfaction on suicidal behaviors.

Research limitations/implications
– Findings here were consistent with the stressor-strain hypothesis. Stressful life events were associated with suicide risk, especially, personal feelings of loneliness, anger, and frustration, followed by interpersonal behavioral problems, such as aggressive behavior toward a significant other and having committed a crime. Evident, too, were the beneficial effects of feelings of cohesiveness, quality leaderships, and job satisfaction on suicidal behaviors. Soldiers reporting these events were less likely to report suicidal behaviors and social support lessened the cumulative effect of risk factors on suicidal behaviors. Given these findings, it seems that suicide risk in the military is not uniquely different from that observed in civilian populations. The higher prevalence of suicides in the military likely has to do with proportionally more individuals who have historically shown to be at risk for suicide, namely, young males.

Practical implications
– Strong association of individual-level attributes with suicidal behaviors, such as age, gender, and race, suggest individual-level vulnerability to suicidal behaviors. This expectation is consistent with the stress/suicide vulnerability theory (Bryan, 2014; Nock et al., 2013). Such vulnerabilities may include negative affectivity (one of the Big Five personality dimensions) and early childhood trauma to suicidal behaviors (Griffith, 2012a, 2014).

Social implications
– Suicide, related constructs, and their underlying processes need to be further examined in future research. Their understanding would be useful in screening individuals most at risk for suicidal behaviors, with referral and treatment, if needed. Practically, such vulnerabilities in relation to what specific experiences could be determined, potentially describing which individuals are suited best to adapt to which environments.

Originality/value
– There has been much research on the increased suicides in the military, and to date, studies have focussed primarily on traumatic events, such as, deployments and combat exposure associated with suicidal behaviors. Yet, studies have almost exclusively examined the combat-suicide connection without reference to suicide risk factors among nondeployed or home station soldiers. This study fills this gap by examining survey responses to standardized questionnaires administered to ARNG soldiers during calendar year 2010 – one sample of deployed units either to Iraq or to Afghanistan and another sample of nondeployed or home station units.