Fig. 3From: What is the effect of perioperative intravenous iron therapy in patients undergoing non-elective surgery? A systematic review with meta-analysis and trial sequential analysisForest plots of the effect of intravenous iron on primary outcomes. Hb = haemoglobin, CI = confidence interval, M-H = Mantel-Haenszel, IV = inverse-variance. a Requirement for RBC transfusion. b Mean number of RBCs transfused. c Short-term mortality (≤ 30 days)Back to article page