Table 1.
Sensitivity of serum antigen test in relation to time post symptom onset.
| Time post symptom onset (days) | Time post symptom onset (days, mean [SD]) | N | Sensitivity (% [CI 95 %]a) |
|---|---|---|---|
| ≤7 | 4.6 (2.3) | 26 | 96.2 (80.4−99.9) |
| 8−14 | 10.4 (1.7) | 24 | 91.7 (73.0−99.0) |
| ≤14 | 7.4 (3.5) | 45 | 95.6 (84.9−99.5) |
| 15−21 | 16.3 (1.9) | 6 | 50.0 (11.8−88.2) |
| ≤21 | 8.4 (4.4) | 51 | 90.2 (78.6−96.7) |
| ≥7 | 16.2 (12.5) | 41 | 75.6 (59.7−87.6) |
| ≥14 | 28.6 (14.9) | 14 | 42.9 (17.7−71.1) |
| ≥21 | 41.1 (10.3) | 7 | 28.6 (3.7−71.0) |
a
Clopper-Pearson confidence interval.