Table 7 Predictive values (%) at different prevalence’s for each of the markers, HIV and Treponema pallidum
From: Laboratory evaluation of four HIV/syphilis rapid diagnostic tests
Prevalence % | SD Bioline HIV/Syphilis Duo | DPP HIV-Syphilis Assay | Multiplo Rapid TP/HIV Antibody Test | Insti Multiplex HIV-1/HIV-2/Syphilis Antibody Test | ||||
|---|---|---|---|---|---|---|---|---|
HIV | T pallidum | HIV | T pallidum | HIV | T pallidum | HIV | T pallidum | |
PPV | ||||||||
 0.1 | 16.68 | 14.76 | 2.44 | 100 | 16.61 | 6.55 | 0.82 | 7.29 |
 1 | 66.89 | 63.60 | 20.16 | 100 | 66.78 | 41.42 | 7.73 | 44.23 |
 5 | 91.32 | 90.10 | 56.82 | 100 | 91.28 | 78.65 | 30.40 | 80.51 |
NPV | ||||||||
 0.1 | 100 | 99.99 | 100 | 99.98 | 100 | 99.97 | 100 | 99.98 |
 1 | 100 | 99.86 | 100 | 99.85 | 99.99 | 99.69 | 99.99 | 99.78 |
 5 | 100 | 99.20 | 100 | 99.22 | 99.97 | 98.43 | 99.97 | 98.87 |