Table 1 Sensitivity, specificity, positive/negative predictive values, positive/negative likelihood ratios for major depression
Parameter | Two screening questions % (95% CI) | Three screening questions % (95% CI) |
|---|---|---|
Sensitivity | 91.3% (81.4 to 96.4) | 59.4% (47.0 to 70.9) |
Specificity | 65.0% (61.2 to 68.6) | 88.2% (85.4 to 90.5) |
Positive predictive value | 21.6% (17.1 to 26.8) | 34.7% (26.4 to 44.1) |
Negative predictive value | 98.6% (96.8 to 99.4) | 95.3% (93.3 to 96.8) |
Positive likelihood ratio | 2.6 (2.3 to 3.0) | 5.0 (3.8 to 6.7) |
Negative likelihood ratio | 0.1 (0.06 to 0.28) | 0.5 (0.3 to 0.6) |