The Cochrane Comparing Multiple Interventions Methods Group (CMIMG) was registered in October 2010.  As of December 2020, it has about 115 members in Archie. CMIMG covers methodology of network meta-analysis (NMA), and overviews of reviews. For membership options, sign up to 'Join Cochrane' in the navigation bar above.

NMA, in the context of a systematic review, compares three or more interventions simultaneously using both direct evidence within studies and indirect evidence across studies.

Overviews of reviews use explicit and systematic methods to search for and identify multiple systematic reviews on a similar topic for the purpose of extracting and analyzing their results across important outcomes. The unit of searching, inclusion, and data analysis is the systematic review rather than the primary study.