Figure 3From: Prediction of early postoperative major cardiac events after elective orthopedic surgery: the role of B-type natriuretic peptide, the revised cardiac risk index, and ASA class Receiver operating characteristic curve for preoperative (Preop.) and postoperative (Postop.) BNP levels and prediction of in-hospital MACE (major cardiac evets). AUC = area under the curve, Ref. = reference line.Back to article page