Table 2.
Coefficient of variation (CV) for intra-assay and inter-assaya.
| Samples | Intra-assay precision | Inter-assay precision | ||
|---|---|---|---|---|
| Measured concentration (ng/mL) | CV (%) | Measured concentration (ng/mL) | CV (%) | |
| A | 46.6 ± 3.0 | 6.4 ± 0.4 | 49.1 ± 2.7 | 5.6 ± 0.3 |
| B | 24.1 ± 2.3 | 9.5 ± 0.9 | 23.8 ± 1.8 | 7.6 ± 0.6 |
| C | 11.9 ± 1.0 | 8.5 ± 0.7 | 12.3 ± 1.0 | 7.9 ± 0.6 |
aIntra-assay precision was calculated from four independent experiments of the same assay on a single day but at different time points, while inter-assay precision was calculated from the assay repeated on three different days (n = 3). All the assays were carried out in triplicate. Data are expressed as mean ± SD (standard deviation). CV: Coefficient of variation.