The efficacy of psychological interventions for posttraumatic stress disorder symptoms in incarcerated forensic populations: A meta-analysis of randomized controlled trials.

Objective: Given the high prevalence of posttraumatic stress disorder (PTSD) symptoms in incarcerated forensic populations, this meta-analysis estimated the efficacy of interventions in this field and explored predictors of intervention outcomes.

Method: Twelve randomized controlled trials of psychological interventions for PTSD symptoms in incarcerated forensic populations were included. A combined Hedges's g effect size was synthesized, quality assessments and risk of bias analyses were performed, and publication bias was assessed. Gender and type of control group were explored as predictors.

Results: Thirteen comparisons from 12 studies were included in the main analysis. A small to medium combined effect size (g = 0.43, p = .005) was found at posttreatment. The type of control group (p = .156) and gender (p = .953) did not predict outcomes. When we analyzed the available follow-up data (k = 5), the effect was nonsignificant (g = 0.36, p = .123). Study quality was poor and risk of bias high, and studies of first-line PTSD treatments were not found in the literature.

Conclusions: A few studies suggest that PTSD treatment may improve symptoms in incarcerated forensic populations, at least temporarily. Follow-up data are still too scarce to draw conclusions about long-term outcomes. Findings of this study indicate that methodologically rigorous outcome research in these populations is needed, with a specific focus on first-line PTSD treatments, long-term efficacy, measurement of recidivism, as well as addressing comorbid conditions given the common complex clinical and social needs in this population. (PsycInfo Database Record (c) 2024 APA, all rights reserved).