((L773:1469 8978) pers:(Cuijpers P))
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- Cuijpers, PVrije University Amsterdam (author)
The effects of psychotherapy for adult depression are overestimated: a meta-analysis of study quality and effect size
- Article/chapterEnglish2010
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- 2010
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:liu-54149
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54149URI
- https://doi.org/10.1017/S0033291709006114DOI
- http://kipublications.ki.se/Default.aspx?queryparsed=id:120040282URI
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- Language:English
- Summary in:English
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- Background. No meta-analytical study has examined whether the quality of the Studies examining psychotherapy for adult depression is associated with the effect sizes found. This study assesses this association. Method. We used a database of 115 randomized controlled trials in which 178 psychotherapies for adult depression were compared to a control condition. Eight quality criteria were assessed by two independent coders: participants met diagnostic criteria for a depressive disorder, a treatment manual was used, the therapists were trained, treatment integrity was checked, intention-to-treat analyses were used, N andgt;= 50, randomization was Conducted by an independent party, and assessors of outcome were blinded. Results. Only 11 studies (16 comparisons) met the eight quality criteria. The standardized mean effect size found for the high-quality studies (d=0.22) was significantly smaller than in the other Studies (d=0.74, pandlt;0.001), even after restricting the sample to the Subset of other studies that used the kind of care-as-usual or non-specific controls that tended to be used in the high-quality studies. Heterogeneity was zero in the group of high-quality studies. The numbers needed to be treated in the high-quality studies was 8, while it was 2 in the lower-quality Studies. Conclusions. We found strong evidence that the effects of psychotherapy for adult depression have been overestimated in meta-analytical studies. Although the effects of psychotherapy are significant, the), are Much smaller than was assumed until now, even after controlling for the type of control condition used.
Subject headings and genre
- Depression
- major depressive disorder
- meta-analysis
- psychotherapy
- psychological treatments
- SOCIAL SCIENCES
- SAMHÄLLSVETENSKAP
Added entries (persons, corporate bodies, meetings, titles ...)
- van Straten, AVrije University Amsterdam (author)
- Bohlmeijer, ETechnical University of Twente (author)
- Hollon, S DVanderbilt University (author)
- Andersson, GerhardKarolinska Institutet,Linköpings universitet,Avdelningen för klinisk och socialpsykologi (CS),Filosofiska fakulteten(Swepub:liu)geran87 (author)
- Vrije University AmsterdamTechnical University of Twente (creator_code:org_t)
Related titles
- In:PSYCHOLOGICAL MEDICINE40:2, s. 211-2230033-29171469-8978
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