BMJ open · 2025
Efficacy and moderators of cognitive behavioural therapy versus interpersonal psychotherapy for adult depression: study protocol of a systematic review and individual participant data meta-analysis.
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Lin Tao, Cohen Zachary D, Stefan Simona, Șoflău Radu, Fodor Liviu A, Georgescu Raluca, Bruijniks Sanne J E, Lemmens Lotte, Bagby Michael, Quilty Lena, Ekeblad Annika, Holmqvist Rolf, Evans Jonathan, O'Mahen Heather A, Johnson Jennifer E, Zlotnick Caron, Hilpert Peter, Carter Janet, McBride Carolina, Constantino Michael, Coyne Alice E, Swartz Holly A, Bylsma Lauren M, Karyotaki Eirini, Miguel Clara, Pantazi Pandora, Schmidt Madison R, Wienicke Frederik J, Breunese Jasmijn, Hollon Steven D, Cuijpers Pim, Cristea Ioana-Alina, Driessen Ellen
Аннотация
INTRODUCTION: Cognitive behavioural therapy (CBT) and interpersonal psychotherapy (IPT) are both efficacious treatments for depression, but it is less clear how both compare on outcome domains other than depression and in the longer term. Moreover, it is unclear which of these two psychotherapies works better for whom. This article describes the protocol for a systematic review and individual participant data (IPD) meta-analysis that aims to compare the efficacy of CBT and IPT for adults with depression on a range of outcomes in both the short and long term, and to explore moderators of the treatment effect. This study can enhance our understanding of treatments for depression and inform treatment personalisation.
METHODS AND ANALYSIS: Systematic literature searches will be conducted in PubMed, PsycINFO, EMBASE and the Cochrane Library from inception to 1 January 2026, to identify randomised clinical trials (RCTs) comparing CBT and IPT for adult depression. Researchers of eligible studies will be invited to contribute their participant-level data. One-stage IPD meta-analyses will be conducted with mixed-effects models to examine (a) treatment efficacy on all outcome measures that are assessed at post-treatment or follow-up in at least two studies, and (b) various baseline participant characteristics as potential moderators of depressive symptom level at treatment completion.
ETHICS AND DISSEMINATION: Ethical approval is not required for this study since it will be based on anonymised data from RCTs that have already been completed. The findings of the present study will be disseminated through a peer-reviewed journal or conference presentation.
METHODS AND ANALYSIS: Systematic literature searches will be conducted in PubMed, PsycINFO, EMBASE and the Cochrane Library from inception to 1 January 2026, to identify randomised clinical trials (RCTs) comparing CBT and IPT for adult depression. Researchers of eligible studies will be invited to contribute their participant-level data. One-stage IPD meta-analyses will be conducted with mixed-effects models to examine (a) treatment efficacy on all outcome measures that are assessed at post-treatment or follow-up in at least two studies, and (b) various baseline participant characteristics as potential moderators of depressive symptom level at treatment completion.
ETHICS AND DISSEMINATION: Ethical approval is not required for this study since it will be based on anonymised data from RCTs that have already been completed. The findings of the present study will be disseminated through a peer-reviewed journal or conference presentation.