Table 2.

Performance of the PHQ-2 in detecting depressive disorder among patients in routine care^* (N=1 206)

Cut-point	Sensitivity (%)	Specificity (%)	Correctly classified (%)	LR+	LR−
≥0	100	0	4.73	1.00	0.00
≥1	92.98	26.28	29.44	1.26	0.27
≥2	78.95	49.26	50.66	1.56	0.43
≥3	57.89	77.37	76.45	2.56	0.54
≥4	42.11	86.86	84.74	3.20	0.67
≥5	17.54	93.56	89.97	2.72	0.88
≥6	12.28	95.74	91.79	2.88	0.92
>6	0	100	95.27	1.00	1.00

PHQ-2 = Patient Health Questionnaire; LR+ = likelihood ratio positive; LR− = likelihood ratio negative.

^*Adult Primary Care assessment by the primary healthcare nurse was used as a diagnostic reference standard.