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Distribution of positive and negative results by assay
| Roche anti-SARS-CoV-2 result | Wantai SARS-CoV-2 Ab ELISA (n) |
Percentage agreement | κa Statistic (95% CI) | ||
|---|---|---|---|---|---|
| Positive result | Negative result | Total | |||
| Positive | 386 | 3 | 389 | 97.7 | 0.93 (0.88–0.97) |
| Negative | 8 | 88 | 96 | ||
| Total | 394 | 91 | 485 | ||
κ, Cohen’s kappa.
