Table 3.

Calibration and discrimination results for the scoring methods in predicting mortality

	Calibration			Discrimination
	goodness-of-fit (χ 2)	df	p	AUC ± SE	95% CI	p
Postoperative SOFA	3.361	6	0.762	0.912 ± 0.019	0.875 – 0.949	<0.001
Postoperative APACHE II	6.335	8	0.610	0.866 ± 0.027	0.813 – 0.919	<0.001
STS-risk of mortality	29.654	8	<0.001	0.898 ± 0.017	0.864 – 0.932	<0.001
EuroSCORE II	40.472	8	<0.001	0.863 ± 0.022	0.821 – 0.906	<0.001

Abbreviations: APACHE Acute Physiology and Chronic Health Evaluation, AUC area under the curve, CI confidence interval, df degree of freedom, EuroSCORE European System for Cardiac Operative Risk Evaluation, SE standard error, SOFA Sequential Organ Failure Assessment, STS Society of Thoracic Surgeons