Table 1. Repeatability and within-laboratory precision of SARS-CoV-2 IgM/IgG according to CLSI EP15-A3.
| Repeatability | Within-laboratory precision | |||||
|---|---|---|---|---|---|---|
| Sample | Mean (AU/mL) | SD | CV (%) | SD | CV (%) | |
| SARS-CoV-2 IgM | 1 | 5.4 | 0.12 | 2.13 | 0.22 | 4.08 |
| 2 | 25.2 | 0.48 | 1.90 | 0.63 | 2.48 | |
| SARS-CoV-2 IgG | 3 | 5.5 | 0.09 | 1.65 | 0.10 | 1.87 |
| 4 | 19.6 | 0.20 | 1.03 | 0.43 | 2.17 | |
We measured SARS-CoV-2 IgM or IgG in two manufacturer’s controls for 5 days, 5 replicates per run, following to the CLSI document EP15-A3. Repeatability and within-laboratory precision were calculated using ANOVA.