Table 3.

Screening ability on the cut-off point 10 of the PHQ-8 and PHQ-9 for major depressive disorder

	PHQ-8	PHQ-9
Cutoff point	≥10	≥10
AUC	0.76 (0.72–0.80)	0.76 (0.73–0.80)
Sensitivity	0.83 (0.77–0.88)	0.88 (0.83–0.92)
Specificity	0.58 (0.53–0.64)	0.56 (0.50–0.61)
PPV	0.53	0.53
NPV	0.86	0.89
LR+	1.99	1.98
LR-	0.29	0.22

95% confidence interval. AUC: area under the curve, PPV: positive predictive value, NPV: negative predictive value, LR+: likelihood ratio positive, LR-: likelihood ratio negative, PHQ: Patient Health Questionnaire