"Moderators of PTSD symptom change in group cognitive behavioral therap" by J. Gayle Beck, Joshua D. Clapp et al.
 

Moderators of PTSD symptom change in group cognitive behavioral therapy and group present centered therapy

Abstract

To examine moderators of change during group-based intervention for Posttraumatic Stress Disorder (PTSD), multilevel models were used to assess trajectories of symptom clusters in male veterans receiving trauma focused Group Cognitive Behavioral Treatment (gCBT; N = 84) or non-trauma focused Group Present Centered Therapy (gPCT; N = 91; Sloan et al., 2018). Separate models were conducted for symptom clusters in each intervention, examining pre-treatment PTSD symptoms, pre-treatment depression severity, age, index trauma, and outcome expectancies as potential moderators. Unconditioned growth models for both gCBT and gPCT showed reductions in intrusions, avoidance, negative cognitions/mood, and arousal/reactivity (all p < .001). Distinct moderators of recovery emerged for each treatment. Reductions in avoidance during gCBT were strongest at high levels of pre-treatment PTSD symptoms (low PTSD: p =. 964, d = .05; high PTSD: p < .001, d = 1.31) whereas positive outcome expectancies enhanced reductions in cognitions/mood (low Expectancy: p =. 120, d =. 50; high Expectancy: p < .001, d = 1.13). For gPCT, high levels of pre-treatment depression symptoms negatively impacted change in both intrusion (low depression: p < .001, d =. 96; high depression: p =. 376, d =. 22) and arousal/reactivity (low depression: p < .001, d =. 95; high depression: p = .092, d =. 39) symptoms. Results support the importance of examining trajectories of change and their moderators for specific treatments, particularly when contrasting trauma focused and non-trauma focused treatments.

Publication Title

Journal of Anxiety Disorders

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