Table 2.
Self-RADT performance
| Overall | TP | FN | FP | TN | Sensitivity (95% CI) | Specificity (95% CI) | |
|---|---|---|---|---|---|---|---|
| Hangzhou | 401 | 41 | 25 | 0 | 335 | 62.1 (50.1–72.9) | 100 (98.9–100) |
| DNA Diagnostic | 423 | 23 | 12 | 0 | 388 | 65.7 (49.2–79.2) | 100 (99.0–100) |
| Abbott | 388 | 0 | 0 | 1 | 387 | Not estimable | 100 (95.6–100) |
Six RADTs (n = 1 DNA Diagnostic, n = 2 Hangzhou, and n = 3 Abbott) were not included in the sensitivity and specificity calculations. RADT results that differed from the PCR test results were considered FP or FN; concurrences between the 2 tests were considered TP or TN.
Abbreviations: CI, confidence interval; FN, false negative; FP, false positive; RADT, rapid antigen detection test; TN, true negative; TP, true positive.