Table 2.
Test performance of the different kits (equivocal results were excluded from the calculation of sensitivity and specificity and are not included in the sample size columns of the table).
| Test Kit | Negative Patients (n) | % Specificity (95% CIe) | Positive PCR ≥14d Patients (n) | % Sensitivity (95% CIe) |
|---|---|---|---|---|
| Abbott | 2382 | 99.5 (99.2–99.74) | 588 | 84.7 (81.5–87.4) |
| Diasorin | 2379a | 98.7 (98.2–99.1) | 562b | 82.4 (79.0–85.3) |
| VIDAS IgG | 1304 | 98.9 (98.2–99.4) | 345 | 89.3 (85.5–92.1) |
| Roche | 1516 | 100.0 (99.8–100.0) | 489 | 89.0 (85.9–91.4) |
| ELISA | 1209c | 97.7 (96.7–98.4) | 310d | 89.4 (85.4–92.3) |
| Beckman | 318 | 100.0 (98.8–100) | 162 | 81.5 (74.6–86.6) |
| Siemens | 432 | 99.8 (98.7–99.94) | 156 | 85.9 (79.4–90.4) |
a 8 equivocal results; b 20 equivocal results; c 19 equivocal results; d 1 equivocal result; e 95% confidence interval calculated using binomial distribution.