Long-Term Guilt and Hostility Underlying Posttraumatic Stress Symptoms in War Combatants and Ex-Prisoners of War

The link between posttraumatic guilt and posttraumatic stress disorder has gained recognition over the past decades and was recently expressed in the modifications made to the diagnostic criteria for the disorder under the DSM-V. Yet, the psychological dynamics underlying this relation are still not fully understood. The present study introduces a model whereby different dynamics between guilt and hostility are related to posttraumatic stress disorder symptoms (PTSS), following different traumatic war experiences. One hundred and forty-four former prisoners of war (ex-POWs) and 143 comparable combatants participated in the study, 30 years after the war, reporting on their PTSS, guilt, and hostility. Moderation analyses revealed a three-way interaction, where high hostility buffered the effect of guilt on PTSS only among ex-POWs. This finding suggests a distinctive dynamic among guilt, hostility, and PTSS following diverse traumatic events. Specifically, it appears that hostility can have a mitigating effect on the negative outcomes of guilt for ex-POWs following trauma, but not for non-POW veterans. The theoretical reasoning and the clinical implications of these findings are discussed.