Table 3.
Performance of Wantai SARS-CoV-2 antibody ELISA test compared to the Roche Elecsys anti-SARS-CoV-2 ELISA test as the gold standard method.
| All women N = 500 | HIV-positive N = 131 | HIV-negative N = 360 | |
|---|---|---|---|
| Wantai +/ Roche + Sensitivity (95% CI) |
270/292 92.5 (88.8-95.2) |
61/64 95.3 (86.9-99.0) |
204/222 91.9 (87.5-95.1) |
| Wantai -/Roche- Specificity (95% CI) |
180/208 86.5 (81.1-90.9) |
55/67 82.1 (70.8-90.4) |
122/138 88.4 (81.9-93.2) |
| Roche+/Wantai+ Positive predictive value (95% CI) |
270/298 90.6 (86.7-93.7) |
61/73 83.6 (73-91.2) |
204/220 92.7 (88.5-95.8) |
| Roche-/Wantai- Negative predictive value (95% CI) |
180/202 89.1 (84.0-93.0) |
55/58 94.8 (85.6-98.9) |
122/140 87.1 (80.4-92.2) |
CI, confidence interval; ELISA, enzyme-linked immunosorbent assay