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Post-combat invincibility: Violent combat experiences are associated with increased risk-taking propensity following deployment
Journal of Psychiatric Research, 06/26/09

Killgore WDS et al. - Exposure to violent combat, human trauma, and having direct responsibility for taking the life of another person may alter an individual’s perceived threshold of invincibility and slightly increase the propensity to engage in risky behavior upon returning home after wartime deployment. Findings highlight the importance of education and counseling for returning service members to mitigate the public health consequences of elevated risk-propensity associated with combat exposure.

Methods

Survey responses regarding 37 different combat experiences were collected from 1252 US Army Soldiers immediately upon return home from combat deployment during Operation Iraqi Freedom.
A second survey that included the Evaluation of Risks Scale (EVAR) and questions about recent risky behavior was administered to these same Soldiers 3 months after the initial post-deployment survey.
Combat experiences were reduced to seven factors using principal components analysis and used to predict post-deployment risk-propensity scores.

Results

Although effect sizes were small, specific combat experiences, including greater exposure to violent combat, killing another person, and contact with high levels of human trauma, were predictive of greater risk-taking propensity after homecoming.
Greater exposure to these combat experiences was also predictive of actual risk-related behaviors in the preceding month, including more frequent and greater quantities of alcohol use and increased verbal and physical aggression toward others.

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