Table 3.

Comparison of ROC curves for the elderly.

Scoring system	AUC	95%CI	Optimal cut-off	Sensitivity	Specificity	Youden’s index
LODS	0.715	0.693–0.737	5.5	0.632	0.681	0.313
SAPS II	0.754	0.734–0.775	46.5	0.685	0.721	0.406
SIRS	0.619	0.596–0.641	2.5	0.804	0.369	0.173
SOFA	0.665	0.642–0.689	6.5	0.474	0.780	0.254