Table 3 Sensitivity, specificity, positive and negative predictive values (PPV and NPV) at different cut-off scores for PHQ-9 summary scores against “current major depressive episode”
From: Utility and limitations of PHQ-9 in a clinic specializing in psychiatric care
Cut-off | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
7/8 | 0.94 | 0.38 | 0.42 | 0.93 |
8/9 | 0.94 | 0.45 | 0.45 | 0.94 |
9/10 | 0.94 | 0.50 | 0.47 | 0.94 |
10/11 | 0.92 | 0.52 | 0.48 | 0.93 |
11/12 | 0.90 | 0.56 | 0.50 | 0.92 |
12/13 | 0.88 | 0.62 | 0.53 | 0.91 |
13/14 * | 0.86 | 0.67 | 0.56 | 0.91 |
14/15 | 0.76 | 0.72 | 0.57 | 0.86 |
15/16 | 0.66 | 0.76 | 0.57 | 0.82 |
16/17 | 0.60 | 0.80 | 0.59 | 0.80 |
17/18 | 0.56 | 0.82 | 0.60 | 0.79 |
18/19 | 0.48 | 0.87 | 0.65 | 0.78 |
19/20 | 0.40 | 0.88 | 0.63 | 0.75 |
20/21 | 0.30 | 0.89 | 0.58 | 0.72 |
21/22 | 0.20 | 0.94 | 0.62 | 0.71 |
22/23 | 0.14 | 0.95 | 0.58 | 0.70 |