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Efficacy of cognitive-behavioural therapy and other psychological treatments for adult depression: meta-analytic study of publication bias
Vrije University Amsterdam.
Vrije University Amsterdam.
Technical University of Twente.
Vanderbilt University.
Show others and affiliations
2010 (English)In: British Journal of Psychiatry, ISSN 0007-1250, E-ISSN 1472-1465, Vol. 196, no 3, 173-178 p.Article, review/survey (Refereed) Published
Abstract [en]

Background: It is not clear whether the effects of cognitive-behavioural therapy and other psychotherapies have been overestimated because of publication bias. Aims: To examine indicators of publication bias in randomised controlled trials of psychotherapy for adult depression. Method: We examined effect sizes of 117 trials with 175 comparisons between psychotherapy and control conditions. As indicators of publication bias we examined funnel plots, calculated adjusted effect sizes after publication had been taken into account using Duval & Tweedies procedure, and tested the symmetry of the funnel plots using the Begg & Mazumdar rank correlation test and Eggers test. Results The mean effect size was 0.67, which was reduced after adjustment for publication bias to 0.42 (51 imputed studies). Both Begg & Mazumbars test and Eggers test were highly significant (Pandlt;0.001). Conclusions: The effects of psychotherapy for adult depression seem to be overestimated considerably because of publication bias. Declaration of interest: None.

Place, publisher, year, edition, pages
2010. Vol. 196, no 3, 173-178 p.
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Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-54617DOI: 10.1192/bjp.bp.109.066001ISI: 000275515800003PubMedID: 20194536OAI: oai:DiVA.org:liu-54617DiVA: diva2:305984
Available from: 2010-03-26 Created: 2010-03-26 Last updated: 2014-11-28

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Andersson, Gerhard

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