Table 4. Performance of SAPS 2 and SAPS 3 scores in the ICU.

Scoring system	Score	Predicted mortality	SMR	Calibration belt	AUROC
	Mean± SD	Mean± SD	(95% CI)	P value	(95% CI)
SAPS 2	31.4 ± 12.9	17.4% ± 17.6	1.74 (1.38–2.09)	<0.001	0.71 (0.65–0.77)
SAPS 3	55.4 ± 12.9	29.9% ± 21.1	1.01 (0.8–1.21)	0.906	0.77 (0.72–0.82)

SMR = Standard Mortality Ratio, AUROC = Area Under the Receiver Operating characteristic Curve, SD = Standard deviation, CI = Confidence Interval