Cognitive behavior therapy vs. control conditions, other psychotherapies, pharmacotherapies and combined treatment for depression: a comprehensive meta-analysis including 409 trials with 52,702 patients.
Level 1 - systematic review of randomized trials
Systematic review and meta-analysis of randomized controlled trials
PubMed 36640411 · doi:10.1002/wps.21069
What was done
Authors searched PubMed, PsycINFO, Embase, and the Cochrane Library for randomized controlled trials evaluating cognitive behavior therapy (CBT) for depression across formats, age groups, and settings. Included trials were categorized by comparator type (control conditions including care as usual and waitlist, other psychotherapies, pharmacotherapies, and combined treatments) and analyzed using random-effects meta-analyses.
What was found
The meta-analysis included 409 trials (518 comparisons) with 52,702 patients. CBT showed moderate-to-large effects versus control conditions (g = 0.79; 95% CI: 0.70–0.89), remaining significant at 6–12 month follow-up with no reduction in effect size by publication era (<2001, 2001–2010, >2011). CBT was statistically more effective than other psychotherapies, but the difference was negligible (g = 0.06; 95% CI: 0–0.12) and became non-significant in most sensitivity analyses. Short-term effects did not differ from pharmacotherapies, but CBT was more effective at 6–12 month follow-up (g = 0.34; 95% CI: 0.09–0.58). Combined treatment was superior to pharmacotherapy alone at short term (g = 0.51; 95% CI: 0.19–0.84) and long term (g = 0.32; 95% CI: 0.09–0.55), but not superior to CBT alone. CBT was also effective as unguided self-help (g = 0.45; 95% CI: 0.31–0.60), in institutional settings (g = 0.65; 95% CI: 0.21–1.08), and in children and adolescents (g = 0.41; 95% CI: 0.25–0.57).
Why it matters
This comprehensive synthesis confirms CBT's robust efficacy across delivery formats and populations, while showing that it holds minimal therapeutic advantage over other bona fide psychotherapies.
Limits
The number of trials comparing CBT to pharmacotherapy at 6–12 month follow-up was small, and that superiority did not hold across all sensitivity analyses. Differences between CBT and other psychotherapies were similarly fragile to sensitivity testing. The abstract does not provide data on dropout rates, treatment adherence, or adverse events.
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