Table 3. Receiver operating characteristic curve analysis of the COIT.

Olfactory function	AUC (95% CI)	P value	Cutoff value	Specificity, %	Sensitivity, %	Youden index
Olfactory disorder	0.8896	<0.0001	12	76.7%	86.7%	0.634
Anosmia	0.9753	<0.0001	7	94.6%	100%	0.946

AUC, area under the curve; CI, confidence interval; COIT, Chinese odor identification test.