A meta-analytic review of exposure in group cognitive behavioral therapy for posttraumatic stress disorder

► We examined the empirical support of group CBT in the treatment of PTSD. ► Comparisons were made between GCBT treatments with and without in-group exposure. ► Overall pre-post effect size of GCBT for PTSD was large. ► No significant differences in effect sizes were found between GCBT treatments. ► Results support the use of exposure-based GCBT as a promising treatment for PTSD.