Post-traumatic symptom severity mediates the association between combat exposure and suicidal ideation in veterans.

Journal Article (Journal Article)

OBJECTIVE: Previous studies of military veterans have produced mixed findings regarding whether combat exposure is directly related to suicidal ideation or is indirectly related to suicidal ideation via its influence on other factors. The present study used a longitudinal design to test the hypothesis that post-traumatic stress disorder (PTSD) symptom severity mediates the effect of combat exposure on suicidal ideation in veterans. METHOD: Participants included 319 post-9/11 veterans (83.4% male; 42.1% White/52.1% Black; Mage  = 39.7) assessed at baseline, 6, and 12 months. Structural equation modeling and bootstrapped confidence intervals were employed to examine the direct and indirect relationships between combat exposure, suicidal ideation, and PTSD symptom severity. RESULTS: Results from the mediation model, in which demographic variables and non-combat trauma were included as covariates, revealed that the indirect effect of combat exposure on suicidal ideation via PTSD symptom severity was statistically significant, accounting for 64.1% of the covariance between combat exposure and suicidal ideation. CONCLUSIONS: This study provides longitudinal evidence that the effects of combat exposure on suicidal ideation are mediated by PTSD symptom severity, suggesting the importance of targeting such symptoms in treatment to mitigate suicide risk among veterans with combat exposure.

Full Text

Duke Authors

Cited Authors

  • Glenn, JJ; Dillon, KH; Dennis, PA; Patel, TA; Mann, AJ; Calhoun, PS; Kimbrel, NA; Beckham, JC; Elbogen, EB

Published Date

  • December 2020

Published In

Volume / Issue

  • 50 / 6

Start / End Page

  • 1167 - 1172

PubMed ID

  • 32770773

Pubmed Central ID

  • PMC7746613

Electronic International Standard Serial Number (EISSN)

  • 1943-278X

Digital Object Identifier (DOI)

  • 10.1111/sltb.12678


  • eng

Conference Location

  • England