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  • Title: Growth mixture modeling of post-combat aggression: Application to soldiers deployed to Iraq.
    Author: Cabrera OA, Adler AB, Bliese PD.
    Journal: Psychiatry Res; 2016 Dec 30; 246():539-544. PubMed ID: 27821366.
    Abstract:
    Prior research has found substantial heterogeneity in the course of key post-deployment outcomes, such as PTSD. The current paper employs growth mixture modeling to identify differential trajectories of change in the course of post-combat aggression. A Brigade Combat Team completed surveys within 72h of return from an Iraq deployment, 4 months later, and at 12 months after return. Based on model fit indices, analyses yielded four latent aggression trajectories: "low-stable", "delayed", "recovery", and "chronic". In addition, most individuals aligned with a "low-stable" trajectory indicative of minimal aggression in the first year following return from a combat deployment. A conditional model showed that lower posttraumatic stress and lower combat exposure characterized individuals aligned with the "low-stable" aggression trajectory relative to individuals aligned with "chronic" and "delayed" aggression trajectories. Implications for targeted intervention and future research are discussed.
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