SARS-CoV2 | Ct < 30 as clinically relevant | Sensitivity (%) of different Ct cut-offs | |||||
---|---|---|---|---|---|---|---|
Ag positive | Ag negative | Ct < 25 | Ct 25 to < 30 | Ct 30 to < 35 | Ct > 35 | ||
Ct value < 30 | 52 | 29 | 74.2 | 69.2 | 30.0 | 33.3 | |
Ct value > 30 negative | 36 | 2993 | |||||
Sensitivity (%) | 64.2 | ||||||
Specificity (%) | 98.8 | ||||||
PPV (%) | 59.1 | ||||||
NPV (%) | 99.0 |