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BinaxNOW antigen card diagnostic performance against the comparator RT-PCR method by cycle threshold counts
| Parameter | No. of positive results with TaqPath COVID-19 kit by CT category |
|||||
|---|---|---|---|---|---|---|
| CT < 33.0 | CT ≥ 33.0 | CT < 30.0 | CT ≥ 30.0 | CT < 23.0 | CT ≥ 23.0 | |
| BinaxNOW antigen card result | ||||||
| Positive | 24 | 0 | 24 | 0 | 23 | 1 |
| Negative | 18 | 3 | 12 | 9 | 1 | 20 |
| Total | 42 | 3 | 36 | 9 | 24 | 21 |
| % positive agreement (95% CI) | 57.1 (42.2–70.9) | 0 | 66.7 (50.3–79.8) | 0 | 95.8 (79.8–99.3) | 4.8 (0.8–22.7) |
