Table 4 Reference test performance in terms of sensitivity, specificity, ROC area and PPV-NPV (Study prevalence of treponemal antibodies: 24%)
value | 95% CI | ||
|---|---|---|---|
Prevalence | 24 | 22 | 26.7 |
Sensitivity | 99.7 | 97.9 | 100 |
Specificity | 99.5 | 98.8 | 99.8 |
ROC area | 0.997 | 0.994 | 1 |
PPV | 98.9 | 97.2 | 99.7 |
NPV | 99.9 | 99.5 | 100 |