Table 3.
The total numbers of RT-PCR-positive patients according to the cycle thresholds (n), of RT-PCR-negative patients and of discrepant results in individual categories using both reference standards, that is, RT-PCR only and RT-PCR + virus viability.
| Ct | n | Discrepant results, n (%) |
||
|---|---|---|---|---|
| RT-PCR vs AGT | RT-PCR + viability vs AGT | |||
| 0–19.99 | 8 | 0 (0%) | 0 (0%) | False negatives of the antigen test |
| 20–24.99 | 40 | 2 (5.0%) | 2 (5.0%) | |
| 24.99–30 | 42 | 1 (2.4%) | 0 (0%) | |
| 30–40 | 74 | 36 (48.7%) | 1 (1.4%) | |
| PCR-negative | 327 | 9 (2.7%) | 9 (2.7%) | False positives of the antigen test |
Ct: cycle threshold; n: number of patients within the threshold.