Authors: Lorne A Becker and Andrew D Oxman.
This chapter should be cited as: Becker LA, Oxman AD. Chapter 22: Overviews of reviews. In: Higgins JPT, Green S (editors), Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 (updated March 2011). The Cochrane Collaboration, 2011. Available from www.handbook.cochrane.org.
Acknowledgements: Methods for Cochrane Overviews have been developed by a working group convened by the Cochrane Collaboration Steering Group, consisting of Lorne Becker (Convenor), Jon Deeks, Paul Glasziou, Jill Hayden, Steff Lewis, Yoon Loke, Lara Maxwell, Andy Oxman, Rebecca Ryan, Denise Thomson, Peter Tugwell and Janet Wale. We thank these for their contributions, and also Lesley Gillespie, Helen Handoll and Julian Higgins for comments on previous drafts.