From: A study of the diagnostic accuracy of the PHQ-9 in primary care elderly
Instrument and Cutpoint | Sensitivity (%) (95% CI) | Specificity (%) (95% CI) | + Likelihood Ratio | - Likelihood Ratio |
---|---|---|---|---|
PHQ-9 Cutpoint | Â | Â | Â | Â |
≥8 | 88 | 75 | 3.6 | 0.16 |
 | (56-98) | (71-77) |  |  |
≥9 | 88 | 80 | 4.4 | 0.16 |
 | (56-98) | (76-82) |  |  |
≥10 | 63 | 82 | 3.5 | 0.46 |
 | (33-86) | (78-85) |  |  |
≥11 | 63 | 84 | 3.8 | 0.45 |
 | (33-85) | (80-87) |  |  |
≥12 | 63 | 84 | 3.8 | 0.45 |
 | (33-85) | (80-87) |  |  |
PHQ-2 Cutpoint | Â | Â | Â | Â |
≥1 | 88 | 61 | 2.2 | 0.21 |
 | (55-98) | (56-62) |  |  |
≥2 | 75 | 67 | 2.3 | 0.37 |
 | (43-93) | (63-70) |  |  |
≥3 | 63 | 85 | 4.2 | 0.44 |
 | (33-85) | (81-88) |  |  |
≥4 | 38 | 93 | 5.7 | 0.67 |
 | (15-62) | (91-97) |  |  |
≥5 | 38 | 98 | 22.9 | 0.64 |
 | (16-48) | (96-100) |  |  |
15-item GDS Cutpoint | Â | Â | Â | Â |
≥5 | 100 | 15 | 1.2 | 0.00 |
 | (73-100) | (11-15) |  |  |
≥6 | 100 | 58 | 2.4 | 0.00 |
 | (70-100) | (54-59) |  |  |
≥7 | 75 | 77 | 3.2 | 0.33 |
 | (43-93) | (72-79) |  |  |
≥8 | 25 | 87 | 1.9 | 0.86 |
 | (7-54) | (84-91) |  |  |
≥9 | 13 | 93 | 1.9 | 0.94 |
 | (2-37) | (92-97) |  |  |