TABLE 1.
Sensitivity and specificity of the CoronaCHEK lateral flow point-of-care assay for the detection of IgM and IgG antibodies to SARS-CoV-2
| Parameter (n) | % (95% CI) for: |
||
|---|---|---|---|
| IgM | IgG | IgM or IgG | |
| Sensitivity | |||
| Uganda | |||
| ≤7 days (22) | 41 (21–64) | 41 (21–64) | 45 (24–68) |
| >7 to 14 days (39) | 74 (58–87) | 49 (32–87) | 79 (64–91) |
| >14–28 days (17) | 41 (18–67) | 65 (38–86) | 76 (50–93) |
| Baltimore | |||
| ≤7 days (102) | 34 (25–44) | 21 (13–30) | 39 (30–49) |
| >7 to 14 days (132) | 82 (74–88) | 75 (67–82) | 86 (79–92) |
| >14–28 days (32) | 100 (89–100) | 100 (89–100) | 100 (89–100) |
| Specificity | |||
| Uganda (1,077) | 96.9 (95.7–97.9) | 99.4 (98.7–99.7) | 96.5 (95.2–97.5) |
| Baltimore (532) | 99.3 (98.1–99.8) | 100 (99.3–100) | 99.3 (98.1–99.8) |