Table 4. Screening performance of the PHQ-9 and PHQ-2.

	PHQ-9	PHQ-2
Overall accuracy (95% CI)	0.81(0.77–0.84)	0.81(0.78–0.85)
Sensitivity (95% CI)	0.76(0.61–0.88)	0.76(0.61–0.88)
Specifisity (95%CI)	0.81(0.77–0.85)	0.82(0.78–0.85)
Positive Predictive Value (95% CI)	0.26(0.19–0.35)	0.27(0.19–0.36)
Negative Predictive Value (95% CI)	0.97(0.95–0.99)	0.98(0.96–0.99)
Odds ratio (95% CI)	13.83(6.56–29.17)	14.22(6.74–30.00)
Positive likelihood ratio	4.06	4.15
Negative likelihood ratio	0.29	0.29
True positive, n	32	32
False positive, n	90	88
False negative, n	10	10
True negative, n	389	391