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Within-laboratory (inter-assay) and within-run (intra-assay) imprecision.
| Imprecision | Betaine (µM) | ||
|---|---|---|---|
| Low | Medium | High | |
| Within-lab a | |||
| Mean | 45.2 | 97.2 | 205.9 |
| SD | 2.5 | 4.0 | 5.2 |
| CV (%) | 5.5 | 4.1 | 2.5 |
| Within-run b | |||
| Mean | 44.1 | 95.6 | 205.6 |
| SD | 1.9 | 3.1 | 3.1 |
| CV (%) | 4.3 | 3.2 | 1.5 |
Abbreviations: CV, coefficients of variation; SD, standard deviation; a Based on CLSI EP5-A2 tested using three controls, two runs per day in duplicate for 20 days (total n = 80); b Based on one run of 20 tests.
