Table 3. Sensitivity of each assay compared with RT-qPCR.
| Abbott SARS-CoV2 Architect Assay (n = 526) | Abbott SARS-CoV2 Alinity Assay (n = 435a) | ||
|---|---|---|---|
| Sensitivity % | Cumulative sensitivity | 69.5% (95% CI: 64.7% -74.1%) | 64.8% (95% CI: 59.4%-69.9%) |
| 0–7 days | 43/77, 55.8% | 37/69, 53.6% | |
| 8–14 | 46/68, 67.6% | 34/57, 59.6% | |
| 15–21 | 36/47, 76.6% | 32/43, 74.4% | |
| 22–30 | 26/46, 56.5% | 21/41, 51.2% | |
| 31–40 | 30/35, 85.7% | 22/28, 78.6% | |
| 41–50 | 21/29, 72,4% | 17/22, 77.2% | |
| >51 | 56/71, 78.8% | 41/58, 70.7% | |
| Cumulative specificity % | 95% (95% CI: 89.9%-98%) | 90.3% (95% CI: 82.9%-95.2%) | |
aDue to sample availability, the number of samples used for the Abbott SARS-CoV2 Alinity Assay differs from that used for the Abbott SARS-CoV2 Architect Assay.