Cochrane Central Register of Controlled Trials This link opens in a new windowThe Cochrane Central Register of Controlled Trials (CENTRAL) is a bibliographic database that provides a highly concentrated source of reports of randomized controlled trials. Records contain the list of authors, the title of the article, the source, volume, issue, page numbers, and, in many cases, a summary of the article (abstract). They do not contain the full text of the article. -Publisher