Table 3. Sensitivity, specificity, and likelihood ratios at various cutoff points of the PHQ-9 (n=81).

PHQ-9 score	Sensitivity	Specificity	LR+	LR-
≥5.00	0.95	0.53	2.03	0.10
≥6.00	0.95	0.65	2.67	0.08
≥7.00	0.95	0.69	3.09	0.08
≥8.00	0.89	0.74	3.47	0.14
≥9.00	0.89	0.79	4.27	0.13
≥10.00	0.74	0.85	5.08	0.31
≥11.00	0.63	0.92	7.83	0.40
≥12.00	0.53	0.94	8.16	0.51
≥13.00	0.47	0.94	7.34	0.56
≥14.00	0.42	0.97	13.05	0.60
≥15.00	0.37	0.97	11.42	0.65

LR+=positive likelihood ratio, LR-=negative likelihood ratio, PHQ-9=Patient Health Questionnaire.