Cochrane Library This link opens in a new windowThe Cochrane Library is a collection of six databases that contain different types of high-quality, independent evidence to inform healthcare decision-making, and a seventh database that provides information about groups in The Cochrane Collaboration. Cochrane Database of Systematic Reviews. Cochrane Central Register of Controlled Trials. Cochrane Methodology Register.Database of Abstracts of Reviews of Effects. Health Technology Assessment Database.NHS Economic Evaluation Database