Protocol: Methodological Expectations of Campbell Collaboration Intervention Meta-Reviews: Conduct and Reporting Standards.


Meta- reviews aim to retrieve, select, synthesise and interpret the results of multiple systematic reviews on the same topic. Meta-reviews are also known as overview of reviews, review of reviews, umbrella review and meta-synthesis(hence forth referred to as meta-reviews). Meta-reviews have various purposes, for example to resolve differences in the results and conclusions of systematic reviews addressing similar subjects, or to compare and summarise multiple interventions for the same problem or population (Cooper and Koenka, 2012; Hartling et al. 2012; Pieper et al. 2012)