Table 3 Rates of sensitivity, specificity, positive predictive value, and negative predictive value of the diagnostic techniques compared to the parasitological techniques
From: Evaluation of real-time PCR assay to detect Schistosoma mansoni infections in a low endemic setting
Method | Measurement | Estimate (%) | CI 95%minimum | CI 95%maximum |
|---|---|---|---|---|
qPCR-feces | Sensitivity | 80.0 | 28.4 | 99.5 |
Specificity | 92.4 | 90.0 | 94.4 | |
Positive Predictive Value (PPV) | 8.0 | 2.2 | 19.2 | |
Negative Predictive Value(NPV) | 99.8 | 99.0 | 100.0 | |
qPCR-serum | Sensitivity | 20.0 | 0.5 | 71.6 |
Specificity | 98.8 | 97.5 | 99.5 | |
Positive Predictive Value (PPV) | 12.5 | 0.3 | 52.7 | |
Negative Predictive Value (NPV) | 99.3 | 98.2 | 99.8 |