Around ten percent of most recent Cochrane reviews included outcomes in their literature search strategy and were associated with potentially exaggerated results: A research-on-research study

ObjectivesTo assess the proportion of the recent Cochrane reviews that included outcomes in their literature search strategy, how often they acknowledged these limitations, and how qualitatively different the results of outcomes included and not included in the search strategy were.Design and SettingWe identified all the Cochrane reviews of the interventions published in 2020 that used a search strategy connecting outcome terms with “AND.”...