Table 2.

Comparison of the accuracy and optimal cutoff values in judging the anesthesia-induced unconsciousness, LOC, and ROC between Ai and BIS.

States of consciousness	Index	AUC	SE	95%CI	Cutoff value	Yd
Anesthesia-induced	Ai	0.941	0.00401	0.933–0.948	71.5	0.789
Unconsciousness	BIS	0.943	0.00412	0.935–0.950	72.5	0.814
LOC	Ai	0.953	0.00437	0.944–0.960	79.5	0.882
	BIS	0.965	0.00424	0.957–0.971	79.5	0.855
ROC	Ai	0.936	0.00456	0.927–0.944	70.5	0.799
	BIS	0.934	0.00479	0.925–0.942	71.5	0.778

AUC, Area under the curve; SE, Standard error; CI: Confidence interval; Cutoff, Optimal Cutoff value; Yd, Youden index.