Table 7.

Predictive values (%) at different prevalence’s for each of the markers, HIV and Treponema pallidum

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

PPV positive predictive value, NPV negative predictive value