Fig. 2.

ROC curve for the prediction of ischemic events. A receiver-operating characteristic (ROC) analysis of ADP-induced platelet inhibition rate (ADP%) was used to distinguish patients with and without ischemic events. A. Prediction of primary ischemic events by ADP% in derivation group; B. Prediction of secondary ischemic events by ADP% in derivation group; C. Prediction of primary ischemic events by ADP% in validation group; D. Prediction of secondary ischemic events by ADP% in validation group. The primary ischemic events defined as the rehospitalization for unstable angina (UA) and the secondary ischemic events defined as the composite of rehospitalization for UA, all-cause death, nonfatal myocardial infarction (MI), stent thrombosis, stroke, and unplanned revascularization within 1 year. AUC: area under the curve