Table 2.
Depicts the diagnostic efficacy of AG-Q COVID-19 N-Antigen self-test in comparison with RT–PCR (done by MedCalc statistical software).
| Gold standard real time PCR for COVID-19 (Ct value range: < 37) for N-Gene and ORF 1ab | AG-Q COVID-19 N-antigen self-test card | ||
|---|---|---|---|
| Test positive | Test negative | ||
| True positive | 86 | 67 (false negative: 19) | 83 (false positive: 0) |
| True negative | 64 | ||
| Value | 95% CI | ||
| Kit sensitivity | 77.91% | 67.67% to 86.14% | |
| Kit specificity | 100.00% | 94.4% to 100.00% | |
| Positive predictive value: the probability that the disease is present when the test is positive | 100.00% | ||
| Negative predictive value: the probability that the disease is not present when the test is negative | 77.11% | 69.37% to 83.36% | |
| Accuracy | 87.33% | 80.93% to 92.20% | |