Table 3 Positive and negative predictive values of HSV-2 test approaches by population prevalence
Positive Predictive Value | |||
|---|---|---|---|
True Prevalence | Focus HSV-2 ELISA | Biokit | Focus HSV-2 ELISA+Biokit |
10 | 61.9% | 86.5% | 89.8% |
20 | 78.5% | 93.5% | 95.2% |
30 | 86.3% | 96.1% | 97.1% |
40 | 90.7% | 97.5% | 98.1% |
50 | 93.6% | 98.3% | 98.8% |
70 | 97.2% | 99.3% | 99.5% |
90 | 99.2% | 99.8% | 99.9% |
Negative Predictive Value | |||
10 | 99.9% | 98.9% | 99.9% |
20 | 99.8% | 97.7% | 99.8% |
30 | 99.6% | 96.0% | 99.6% |
40 | 99.4% | 94.0% | 99.4% |
50 | 99.1% | 91.2% | 99.1% |
70 | 98.0% | 81.7% | 97.9% |
90 | 92.5% | 53.6% | 92.3% |