A preliminary test of the interpersonal-psychological theory of suicidal behavior in a military sample

Suicide in the military is a growing concern. The interpersonal-psychological theory of suicidal behavior proposes that an individual will not die by suicide unless he or she experiences a combined disconnection from others, feelings that one is a burden on others, and the ability to do so, but this theory has not yet been rigorously tested with military samples. The current study tested the theory's hypotheses in predicting history of suicide in a sample of 88 active duty US Air Force personnel, which was compared to a non-military undergraduate sample (n = 309) and a non-military clinical sample (n = 228). Active duty personnel demonstrated higher acquired capability when compared to a clinical non-military sample. As compared to non-military undergraduates, active duty personnel demonstrated less perceived burdensomeness. but did not differ in terms of thwarted belongingness. The interaction of burdensomeness and acquired capability significantly predicted suicidal history, but the three-way interaction between burdensomeness, belongingness, and acquired capability did not, providing partial support for the theory in a military sample. (C) 2009 Elsevier Ltd. All rights reserved.