Rumination as a Mediator of the Associations Between Moral Injury and Mental Health Problems in Combat-Wounded Veterans.

Moral injury is hypothesized to develop from witnessing or engaging in events that violate one's beliefs about themselves and has been shown to be associated with negative mental health symptoms. Although there has been an increase in research examining moral injury among military veterans, mechanisms that link moral injury to mental health outcomes are not well understood. The present study examined rumination subcomponents (problem-focused thoughts, counterfactual thinking, repetitive thoughts, and anticipatory thoughts) as possible mediators of the associations between moral injury (both self-directed and other-directed symptoms) and negative mental health symptoms (i.e., depression, anxiety, suicidality, sleep disturbance, memory problems, and posttraumatic stress disorder symptoms). Participants were 189 combat wounded veterans (180 men; Mean age = 43.14 years) who had experienced one or more deployments (defined as 90 days or more). Nearly all participants reported a service-connected disability (n = 176, 93.1%), with the average participant reporting a 90% total VA disability ranking, and most participants had received a purple heart (n = 163, 86.2%). Within our comprehensive mediation model, we found eight significant mediation effects with the most consistent mediator being problem-focused thoughts. Specifically, both self-directed and other- directed moral injury were associated with increased problem-focused thoughts, which in turn was associated with higher reported symptoms of depression, anxiety, and posttraumatic stress disorder. Taken together, rumination, and in particular, problem-focused thoughts, is relevant to understand the increased vulnerability of military veterans to exhibit poor mental health outcomes when experiencing moral injury.