A meta-analysis of relapse rates in cognitive-behavioral therapy for anxiety disorders.

Cognitive-behavioral therapy (CBT) is a first-line treatment for anxiety and related disorders, with large pre- to post-treatment effect sizes. Rates of relapse, or the likelihood that a state of remission will be maintained once treatment is withdrawn, have been relatively neglected in CBT outcome studies. The present meta-analysis aimed to determine the overall rate of relapse in CBT for anxiety and related disorders. A secondary aim was to assess whether demographic, clinical, and methodological factors were associated with rates of relapse in CBT. Articles were identified from prior CBT meta-analyses and review papers and from literature searches using the PsycINFO and Medline electronic databases, with 17 full-length articles retained for meta-analysis (total N = 337 patients). Results showed an overall relapse rate of 14 %, which did not significantly differ between diagnoses. The way in which relapse was defined was significantly associated with relapse rates; when relapse was defined as meeting diagnostic criteria, estimates were lower than when alternative definitions were used. The findings indicate that relapse following symptom remission occurs in a minority of patients, suggesting that future treatment development and refinement efforts should focus on improving relapse prevention skills and interventions to minimize risk of relapse.