Table 4 Sensitivity and specificity of each screening instrument using a broadened definition of depression*
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 | ||||
| ≥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 | ||||
| ≥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 | ||||
| ≥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) |
