TABLE 5.

Criterion values and coordinates of ROC Curve for depression.

Cut-off point	Sensitivity	Specificity	PPV	NPV	Accuracy	Youden index
7	98.82	71.24	66.75	99.04	81.41	70.06
8	98.04	79.52	73.67	98.58	86.35	77.56
9	95.95	86.34	80.41	97.33	89.89	82.29
10#	91.93#	92.76#	88.12#	95.16#	92.45#	84.69#
11	85.76	96.12	92.82	92.03	92.30	81.88
12	78.19	98.38	96.57	88.53	90.93	76.57
13	69.37	99.52	98.82	84.76	88.40	68.89

ROC, receiver operating characteristic; PPV, positive predictive value; NPV, negative predictive value. ^#Selected as the optimal cut-off value.