Article Text

Download PDFPDF

Approaches for synthesising complex mental health interventions in meta-analysis
  1. Deborah M Caldwell,
  2. Nicky J Welton
  1. School of Social and Community Medicine, University of Bristol, Bristol, UK
  1. Correspondence to Dr Deborah M Caldwell, d.m.caldwell{at}


Clinical and statistical heterogeneity are commonplace in meta-analysis of mental health interventions. One possible source of this heterogeneity is the complexity of the intervention being evaluated. Complexity may relate to the intervention, or to the way in which it is implemented; however, the most common interpretation of a complex intervention is one which has multiple, potentially interacting components. In this article we outline different analytical strategies suggested for incorporating intervention complexity in a meta-analysis.

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.