Table 4.
Two 2 × 2 contingency tables on antigen rapid test performance in the assessment of patients with COVID-19. The first table focuses on the rapid antigen test among symptomatic patients for SARS-CoV-2 and the table below focuses on the rapid antigen test among asymptomatic patients for SARS-CoV-2.
| Patients COVID-19 non-infected | Patients COVID-19 infected | |
|---|---|---|
| Only considering symptomatic patients for COVID-19 | ||
| Negative antigen test for COVID-19 | 876 | 30 |
| Positive antigen test for COVID-19 | 21 | 264 |
| Sensitivity | 89.8% (88.0–91.5) | |
| Specificity | 97.6% (97.1–98.1) | |
| Positive predictive value | 92.6% (91.0–94.1) | |
| Negative predictive value | 96.7% (96.0–97.2) | |
| Accuracy (correctly classified) | 95.7% (95.1–96.3) | |
| Only considering asymptomatic patients for COVID-19 | ||
| Negative antigen test for COVID-19 | 2594 | 38 |
| Positive antigen test for COVID-19 | 11 | 65 |
| Sensitivity | 63.1% (58.4–67.8) | |
| Specificity | 99.6% (99.5–99.7) | |
| Positive predictive value | 85.5% (81.5–89.5) | |
| Negative predictive value | 98.5% (98.3–98.7) | |
| Accuracy (correctly classified) | 98.2% (97.9–98.4) | |