Table 2 Reference test performance in terms of sensitivity, specificity, ROC area and PPV-NPV (Study prevalence of treponemal antibodies: 24%)
value | 95% CI | ||
|---|---|---|---|
Prevalence | 24.2 | 22.1 | 26.5 |
Sensitivity | 99.7 | 98.5 | 100 |
Specificity | 99.4 | 98.7 | 99.7 |
ROC area | 0.996 | 0.992 | 0.999 |
PPV | 98.1 | 96.1 | 99.2 |
NPV | 99.9 | 99.5 | 100 |