Table 2 Optimal SRQ-20 cut-off for detection of common mental disorder and associated validity coefficients
SRQ-20 Cut off | Prevalence of common mental disorder | Sensitivity (%) | Specificity (%) | Positive predictive value | Negative predictive value | % correctly classified | Youden’s index |
|---|---|---|---|---|---|---|---|
≥7 | 49.6% | 90.0 | 54.4 | 16.2 | 98.2 | 57.6 | 0.44 |
≥8 | 46.0% | 75.0 | 56.9 | 14.6 | 95.9 | 58.5 | 0.32 |
≥9 | 41.5% | 70.0 | 61.3 | 15.1 | 95.4 | 62.1 | 0.31 |
≥10 | 36.2% | 65.0 | 66.8 | 16.0 | 95.1 | 66.5 | 0.32 |