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Agreement of STANDARD Q COVID-19 Ag test between the nasal cavity and nasopharyngeal specimens.
| Nasal Cavity Specimen | Nasopharyngeal Specimen | ||
|---|---|---|---|
| Positive | Negative | Total | |
| Positive | 54 | 1 | 55 |
| Negative | 4 | 12 | 16 |
| Total | 58 | 13 | 71 |
Cohen’s kappa index = 0.78 (95% CI, 0.60–0.96).
