Table 1.
Samples used for analysis.
| Prevalence | Incidence | Participants tested |
Participants with discordant test resultsa |
Samples evaluatedb |
Samples classified as HIV positivec |
|
|---|---|---|---|---|---|---|
| Tanzania | 5.9% | 0.78% | 9,041 | 187 (2.1%) | 127 (67.9%) | 24 (18.9%) |
| South Africa | 21.8% | 2.3% | 25,772 | 68 (0.3%) | 46 (67.6%) | 5 (10.9%) |
| Soweto | 14.1% | 1.18% | 13,929 | 22 (0.2%) | 16 (72.7%) | 3 (18.8%) |
| Vulindlela | 30.8% | 3.90% | 11,843 | 46 (0.4%) | 30 (65.2%) | 2 (6.7%) |
| Total | 17.7% | 1.85% | 34,813 | 255 (0.7%) | 173 (67.8%) | 29 (16.8%) |
a
Samples were tested in-country using two HIV rapid tests. The number and percentage of samples that had discordant HIV rapid test results (one reactive result and one non-reactive result) are shown.
b
Samples from 173 study participants were evaluated in this study. Samples from the remaining 82 participants who had discordant HIV rapid test results were not evaluated for the following reasons: insufficient plasma available (N=80), in-country sample contamination (N=1), and in-country sample mix-up (N=1).
c
Samples were classified as HIV positive or HIV negative using the testing algorithm shown in Figure 1. The number and percentage of samples evaluated in this study that were classified as HIV positive are shown.