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 |
≥6 | 77 | 69 | 2.5 | 0.34 |
 | (56-90) | (63-74) |  |  |
≥7 | 77 | 77 | 3.3 | 0.31 |
 | (56-90) | (70-81) |  |  |
≥8 | 77 | 83 | 4.4 | 0.28 |
 | (57-89) | (76-87) |  |  |
≥9 | 71 | 87 | 5.2 | 0.34 |
 | (51-85) | (80-91) |  |  |
≥10 | 59 | 89 | 5.1 | 0.47 |
 | (40-74) | (82-93) |  |  |
PHQ-2 Cutpoint | Â | Â | Â | Â |
≥1 | 82 | 67 | 2.5 | 0.26 |
 | (62-94) | (61-71) |  |  |
≥2 | 71 | 73 | 2.6 | 0.40 |
 | (50-86) | (66-78) |  |  |
≥3 | 53 | 90 | 5.5 | 0.52 |
 | (35-67) | (85-95) |  |  |
≥4 | 35 | 98 | 18.4 | 0.66 |
 | (21-40) | (94-100) |  |  |
≥5 | 18 | 98 | 9.2 | 0.84 |
 | (7-22) | (95-100) |  |  |
15-item GDS Cutpoint | Â | Â | Â | Â |
≥4 | 94 | 4 | 0.98 | 1.63 |
 | (85-99) | (1-5) |  |  |
≥5 | 88 | 14 | 1.0 | 0.93 |
 | (71-96) | (8-16) |  |  |
≥6 | 81 | 62 | 2.1 | 0.30 |
 | (60-93) | (55-65) |  |  |
≥7 | 56 | 79 | 2.7 | 0.55 |
 | (36-74) | (73-84) |  |  |
≥8 | 31 | 90 | 3.3 | 0.76 |
 | (16-46) | (86-95) |  |  |