Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sensitivity of the SARS-CoV-2 Rapid Antigen Test according to RT-PCR Ct intervals.
| Ct values | N | True positive | Sensitivity% (CI95%) |
|---|---|---|---|
| <20 | 9 | 9 | 100 (65·54–100)* |
| 20 - <25 | 23 | 21 | 91·30 (71·96–98·93) |
| 25 - <30 | 9 | 4 | 44·44 (13·7–78·8) |
| ≥30 | 8 | 1 | 12·5 (0·32–52·65) |
* calculate Agresti-Coull confidence intervals.
