Fig. 2From: Effects of intravenous glucocorticoids on postoperative delirium in adult patients undergoing major surgery: a systematic review and meta-analysis with trial sequential analysisSummary of risk of bias: review authors’ judgments on the risk of bias for each study according to the Cochrane Risk of Bias Methods: ( +), low risk of bias; (?), unclear risk of bias; ( −), high risk of biasBack to article page