ArticleAmerican journal of psychotherapy2025
Comparing Suicide Rates for Cognitive Processing Therapy Versus Prolonged Exposure Therapy for Posttraumatic Stress Disorder.
Article in American journal of psychotherapy, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveThis study aimed to compare suicide mortality rates for patients receiving two evidence-based psychotherapy (EBP) protocols for posttraumatic stress disorder (PTSD): cognitive processing therapy (CPT) and prolonged exposure (PE).
methodsSuicide mortality was measured among U.S. Department of Veterans Affairs patients with PTSD who received EBP from 2009 through 2019. Regional variation in delivering CPT versus PE was leveraged as an instrumental variable (IV) to compare suicide mortality by using standard adjustment and IV-based analyses.
resultsIn total, 62,686 patients received EBP for PTSD; 82.4% were male, and the mean±SD age was 46.9±14.4. Patients were followed for a median of 6 years, and there were 136 deaths by suicide (38.3 and 32.4 per 100,000 person-years among the CPT and PE groups, respectively). The regional rate of CPT versus PE delivery was a strong IV that had greater explanatory power for the type of EBP received than all patient factors combined. The standard adjustment model for CPT produced a hazard ratio of 1.25, whereas the reduced-form IV produced a hazard ratio of 1.22. The probit IV, in which relevant covariates were updated annually, produced an odds ratio of 0.99. The time-to-event IV produced a hazard ratio of 1.20. The differences were not significant.
conclusionsNo statistically significant difference was found between CPT and PE in the outcome of death by suicide. More effective interventions that result in higher remission rates would likely need to be developed to achieve a relative decrease in suicide risk through PTSD treatment.
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