External factors may influence Cochrane reviewers when classifying the risk of bias of original reports

ObjectiveThe objective of the study was to explore contextual factors associated with high or low risk-of-bias judgment in case of incomplete or unclear information in study reports.Study Design and SettingResearch-on-research study, using matched case–control design, with a sample of 304 randomized controlled trials (RCTs) included in two Cochrane reviews for which there was disagreement on the risk-of-bias judgment related to incomplete or...