Table 4.

AUCs for the discriminative ability of the base model as well as the base model with comorbidity indices in predicting 90-day and 1-year mortality

Score	90-day mortality		1-year mortality
	AUC (95% CI)	p value	AUC (95% CI)	p value
Base model (age, gender, and year of surgery)	0.609 (0.557-0.661)	< 0.001	0.610 (0.571-0.648)	< 0.001
Base model and ASA score	0.727 (0.680-0.775)	< 0.001	0.712 (0.677-0.747)	< 0.001
Base model and ECI	0.769 (0.726-0.812)	< 0.001	0.763 (0.731-0.796)	< 0.001
Base model and CCI	0.759 (0.719-0.799)	< 0.001	0.780 (0.750-0.809)	< 0.001

AUC = area under the curve; ASA = American Society of Anesthesiologists; ECI = Elixhauser comorbidity index; CCI = Charlson comorbidity index.