Comorbidity in the prediction of Cognitive Processing Therapy treatment outcomes for combat-related posttraumatic stress disorder
Lloyd, D., Nixon, R., Varker, T., Elliott, P., Perry, D., Bryant, R., . . . Forbes, D. (2014). Comorbidity in the prediction of cognitive processing therapy treatment outcomes for combat-related posttraumatic stress disorder. Journal of Anxiety Dsorders, 28, 237-240.
Background: This paper examines clinical predictors of posttraumatic stress disorder (PTSD) treatment outcomes following Cognitive Processing Therapy (CPT) in Australian military veterans.
Method: Fifty nine treatment seeking veterans were enrolled in a randomized controlled trial comparing 12 sessions of CPT (n=30) with usual treatment (n=29) at three community-based veterans counseling centers. PTSD and key co-morbidities (depression, anxiety, anger and alcohol use) were measured.
Results: Growth curve modeling was used to examine factors which influenced PTSD severity post-treatment. For the CPT condition, baseline anger was the only co-morbidity predictive of change in PTSD severity over time. Participants with higher anger scores showed less of a decrease in PTSD severity over time. Higher anxiety in participants in treatment as usual was significantly associated with better treatment gains.
Discussion: This research suggests that veterans experiencing high levels of anger might benefit from targeted anger reduction strategies to increase the effectiveness of CPT treatment for PTSD.