TABLE 9.
Reproducibility and intraclass correlation of neutralization assaysa
| Neutralization SARS-CoV-2 serological assay reproducibility and intraclass correlation coefficient | ||||
|---|---|---|---|---|
| Assay ID | Within day (%) | Across day (%) | Overall (%) | Intraclass correlation coefficient (ICC) |
| 25 | – | 35.3 | 35.3 | 0.877 |
| 26 | 41.4 | 46.2 | 62.0 | 0.745 |
| 27 | 53.8 | 80.7 | 97.0 | 0.555 |
| 28 | – | 48.8 | 48.8 | 0.901 |
| 29 | – | 27.5 | 27.5 | 0.957 |
| 30 | 26.1 | 36.1 | 44.5 | 0.936 |
| 31 | 15.3 | 24.7 | 29.1 | 0.965 |
| 32 | 1.8 | 4.4 | 4.7 | 0.989 |
| 33 | – | 24.2 | 24.3 | 0.943 |
a
Variability above 20% is highlighted in bold. Data analysis was performed prior to harmonization. Dashes represent data that was not evaluated due to no within day replicate testing.