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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
  1. PPV positive predictive value, NPV negative predictive value