Criterion validity for three key questions using CIDI as gold standard
| Key questions | Sensitivity % (95% CI) | Specificity % (95% CI) | Correctly classified % | Positive likelihood ratio |
|---|---|---|---|---|
| A | 82 (0.66 to 0.92) | 77 (0.71 to 0.81) | 78 | 3.6 |
| B | 48 (0.32 to 0.65) | 98 (0.96 to 0.99) | 93 | 25 |
A = answer ‘yes’ to either or both key questions. B = answer ‘yes’ to either or both key questions and ‘yes’ to help question. The values represent all depression diagnoses. Sensibility and specificity, both sexes.
a Loevinger’s H > 0.50.29
b Cronbach’s α >0.70.30 CIDI = Composite International Diagnostic Interview.