Figure 4.
Receiver operator characteristic (ROC) area under the curves (AUC) for American Society of Anesthesiologists (ASA) classification, Charlson comorbidity index (CCI) and the modified frailty index (mFI) and 30-day mortality. There were no significant differences in AUCs for 30-day mortality between all 3 risk stratification methods (p>0.05 all).
