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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