Table 1.
Accuracy, within-day and between-day imprecision of CA and MCA in DBS spiked at two different levels.
| Sample | Analyte | Concentration added, µmol/L | Within-day (n = 12) | Between-day (n = 12) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean, µmol/L | SDa, µmol/L | CVb, % | Accuracy, % | Mean, µmol/L | SD, µmol/L | CV, % | Accuracy, % | |||
| QC 1c | CA | 115 | 114 | 6.7 | 5.9 | −0.9 | 126 | 11.1 | 8.8 | 9.6 |
| MCA | 1.9 | 2.0 | 0.19 | 9.9 | 5.3 | 2.0 | 0.23 | 11.8 | 5.3 | |
| QC 2 | CA | 200 | 191 | 15.4 | 8.1 | −4.5 | 199 | 24.7 | 12.4 | −0.5 |
| MCA | 5.7 | 5.6 | 0.53 | 9.4 | −1.8 | 5.9 | 0.53 | 9.1 | 3.5 | |
aSD = standard deviation.
bCV (%) = coefficient of variation.
cQC = quality control.