Table 4.
Sensitivity and specificity for detecting past-12-monthmajor depressive disorder (as measured by the CIDI) across various cutpoint scores of the PHQ-9 (N = 1098)
| Cutpoint score |
Prevalence at cutpoint, % |
Sensitivity, % (95% CI) |
N false negative |
Specificity, % (95% CI) |
N false positive |
Positive LR (95% CI) |
Negative LR (95% CI) |
PPV, % (95% CI) |
NPV, % (95% CI) |
|---|---|---|---|---|---|---|---|---|---|
| ≥4 | 79 | 95 (91, 99) | 5 | 22 (20, 25) | 768 | 1.2 (1.2, 1.3) | 0.21 (0.087, 0.49) | 12 (9.8, 14) | 98 (96, 99.7) |
| ≥5 | 67 | 89 (83, 95) | 12 | 36 (33, 39) | 633 | 1.4 (1.3, 1.5) | 0.31 (0.18, 0.52) | 13 (11, 16) | 97 (95, 99) |
| ≥6 | 54 | 80 (72, 87) | 22 | 48 (45, 52) | 510 | 1.5 (1.4, 1.7) | 0.42 (0.29, 0.61) | 15 (12, 17) | 96 (94, 97) |
| ≥7 | 47 | 71 (62, 79) | 32 | 56 (53, 59) | 434 | 1.6 (1.4, 1.9) | 0.52 (0.39, 0.70) | 15 (12, 18) | 95 (93, 96) |
| ≥8 | 40 | 61 (51, 70) | 43 | 62 (59, 65) | 372 | 1.6 (1.4, 1.9) | 0.63 (0.50, 0.80) | 15 (12, 18) | 93 (92, 95) |
| ≥9 | 34 | 55 46, 64) | 49 | 68 (65, .71) | 313 | 1.7 (1.4, 2.1) | 0.66 (0.53, 0.81) | 16 (12, 20) | 93 (91, 95) |
| ≥10 | 28 | 49 (39, 58) | 56 | 74 (71, 77) | 258 | 1.9 (1.5, 2.3) | 0.70 (0.58, 0.84) | 17 (13, 21) | 93 (91, 95) |
| ≥11 | 25 | 38 (29, 47) | 68 | 77 (74, 80) | 228 | 1.6 (1.2, 2.1) | 0.81 (0.70, 0.94) | 15 (11, 20) | 92 (90, 94) |
| ≥12 | 21 | 33 (24, 42) | 73 | 80 (78, 83) | 196 | 1.7 (1.2, 2.2) | 0.84 (0.73, 0.96) | 16 (11, 20) | 92 (90, 93) |
| ≥13 | 18 | 28 (19, 36) | 79 | 83 (81, 86) | 166 | 1.6 (1.2, 2.3) | 0.87 (0.77, 0.98) | 15 (10, 20) | 91 (89, 93) |
| ≥14 | 15 | 22 (14, 30) | 85 | 85 (83, 88) | 145 | 1.5 (1.0, 2.2) | 0.91 (0.82, 1.0) | 14 (8.9, 19) | 91 (89, 93) |
| ≥15 | 11 | 17 (10, 25) | 92 | 87 (85, 90) | 105 | 1.4 (.89, 2.2) | 0.94 (0.86, 1.0) | 13 (7.7, 19) | 91 (89, 92) |
CI = confidence interval, LR = likelihood ratio, NPV = negative predictive value, PPV = positive predictive value