Table 2 Operating characteristics of the Patient Health Questionnaire-9 at various cut-off scores for identifying either minor or major depression
Cut point | Sensitivity | Specificity | Correctly Classified | LR+ | LR - |
|---|---|---|---|---|---|
(> = 4) | 100.00% | 57.89% | 75.23% | 2.3750 | 0.0000 |
(> = 5) | 100.00% | 69.47% | 82.04% | 3.2759 | 0.0000 |
(> = 6) | 93.23% | 77.89% | 84.21% | 4.2177 | 0.0869 |
(> = 7) | 79.70% | 85.79% | 83.28% | 5.6085 | 0.2366 |
(> = 8) | 73.68% | 90.00% | 83.28% | 7.3684 | 0.2924 |
(> = 9) | 63.91% | 93.68% | 81.42% | 10.1190 | 0.3852 |
(> = 10) | 55.64% | 96.84% | 79.88% | 17.6190 | 0.4581 |
(> = 11) | 42.11% | 98.42% | 75.23% | 26.6668 | 0.5882 |
(> = 12) | 36.09% | 99.47% | 73.37% | 68.5717 | 0.6425 |
(> = 13) | 27.82% | 99.47% | 69.97% | 52.8573 | 0.7256 |