Table 5. ROC analyses for EuroSCORE II and STS score for mortality in octogenarian patients.

			AUC	95% CI	P for AUC >0.5	P for difference between curves
All operations		STS	0,537	0.422-0.631	0,554	0,003
		EuroSCORE II	0,754	0.665-0.829	<0.001
Timing of operation	Elective	STS	0,584	0.443-0.726	0,243	0,692
		EuroSCORE II	0,761	0.644-0.877	<0.001
	Urgent	STS	0,524	0.281-0.766	0,848	0,058
		EuroSCORE II	0,615	0.392-0.838	0,31
ROC: Receiver operating characteristic; EuroSCORE II: European System for Cardiac Operative Risk Evaluation II; STS: Society of thoracic surgeons; AUC: Area under the curve; CI: Confidence interval.