Table 1 Positivity rate of the SD-Biosensor rapid Ag kit for different RT-qPCR kits at different Ct values
PCR Kit (number of PCR positive samples) | Avg Ct value for PCR | Number of samples used | Sensitivity of the SD-Biosensor Ag kit (%) | 95% CI lower limit (%) | 95% CI upper limit (%) |
|---|---|---|---|---|---|
SeeGene Kit (n = 505) | < 25 | 177 | 76.6 | 69.5 | 82.5 |
26–30 | 130 | 36.2 | 28.1 | 45.1 | |
31–38 | 198 | 6.1 | 3.3 | 10.6 | |
TAQPATH Kit (n = 186) | < 25 | 87 | 71.3 | 60.4 | 80.2 |
26–30 | 77 | 13 | 6.7 | 23 | |
31–38 | 22 | 9.5 | 1.7 | 31.8 | |
SD-Biosensor RT-qPCR Kit (n = 183) | < 25 | 61 | 72.1 | 59% | 82.5 |
26–30 | 51 | 7.8 | 2.5% | 19.7 | |
31–38 | 71 | 0% | 0 | 6.4 |