Recalibration cohort. Comparison of Model 3 with the revised cardiac risk index and the American Society of Anesthesiologists classification for the prediction of perioperative myocardial infarction/injury in the recalibration cohort (A). Comparison of the area under the receiver operating characteristic curve of the three prediction models to perioperative myocardial infarction/injury in the recalibration cohort (B). RCRI, revised cardiac risk index; ASA, American Society of Anesthesiologists; PMI, perioperative myocardial infarction/injury; AUC, area under the receiver operating characteristic curve.