Fig. 4

Receiver operating characteristic curve for MAC score and Kaplan–Meier analysis in the validation group. (a) ROC curve of MAC score in the validation group (n = 196). Cases with missing data were excluded from the analysis. The AUC was 0.81. The sensitivity and specificity were 76.9 and 73.8%, respectively, at a cutoff value of 3. (b) Kaplan–Meier analysis stratified by MAC score in the validation group. MAC scores exceeding 3 points showed poor survival outcomes. AUC, area under the curve; ROC, receiver operating characteristic.