Assay | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
---|
Smear | 70.5 | 100 | 99.9 | 73.6 |
PS-PCR | 81 | 84.2 | 86.2 | 78.5 |
Smear + PS-PCR | 97.61
| 83.3 | 87.9 | 91 |
- PPV = positive predictive values; NPV = negative predictive values, estimated applying the theorem of Bayes. The positive and negative PCR controls and the results from healthy individuals from non-endemic areas were not included in the calculations.1The differences between proportions were statistically significant (P = 0.0018) when the Smear + PS-PCR were compared against these tests alone.