Longitudinal measures of hostility in deployed military personnel. Issue 1 (30th September 2015)

• Record Type: Journal Article
• Authors: Heesink, Lieke; Rademaker, Arthur; Vermetten, Eric; Geuze, Elbert; Kleber, Rolf
• Is Part Of: Psychiatry research. Volume 229:Issue 1/2(2015)
• Page Start: 479
• Page End: 484
• Publication Date: 2015-09-30
• Subjects: Hostility -- Anger -- Aggression -- Deployment -- Growth mixture modeling -- Personality; Psychiatry -- Periodicals; Psychiatry -- periodicals; Psychiatrie -- Périodiques; 616.89
• DOI: 10.1016/j.psychres.2015.05.082
• Languages: English
• ISSNs: 0165-1781

Abstract

Abstract: Increases in anger and hostility are commonly found after military deployment. However, it is unknown how anger and hostility develop over time, and which veterans are more at risk for developing these complaints. Data of 745 veterans one month before deployment to Afghanistan and one, six, twelve and 24 months after deployment were analyzed in a growth model. Growth mixture modeling revealed four classes based on their growth in hostility. Most of the participants belonged to a low-hostile group or a mild-hostile group that remained stable over time. Two smaller groups were identified that displayed increase in hostility ratings after deployment. The first showed an immediate increase after deployment. The second showed a delayed increase between twelve and 24 months after deployment. No groups were identified that displayed a decrease of hostility symptoms over time. Multinomial logistic regression was applied to predict group membership by age, education, early trauma, deployment stressors and personality factors. This study gains more insight into the course of hostility over time, and identifies risk factors for the progression of hostility. Highlights: Growth Mixture Modeling revealed four groups based on their increase of hostility before and after deployment. This study revealed that the increase in anger and hostility does not only take place immediate after deployment, but even between one and two years after home-coming. Hostility symptoms might easily become chronic. Predictors for the development of hostility symptoms are age, education, early trauma, deployment stressors and personality factors.