Table 4.
Within-run and between-run precision for 2 spiked canine urine cortisol levels and 2 levels of quality control material.
| Precision | n | Days | Level: nmol/L (μg/dL) | CV (%) |
|---|---|---|---|---|
| Within-run (spiked) | 20 | 1 | L4: 38.6 (1.4) | 6.4 |
| 20 | 1 | L8: 552 (20) | 2.5 | |
| Between-run (spiked) | 20 | 5 | L4: 38.6 (1.4) | 9.6 |
| 20 | 5 | L8: 552 (20) | 4.6 | |
| Between-run (QCM) | 17 | 17 | QCM1: 185 (6.7)* | 5.4 |
| 17 | 17 | QCM2: 648 (23.5)* | 4.5 |
CV = coefficient of variation; Lx = level x (see dilution Table 1); n = numbers of repeats; QCM = quality control material.
*
Concentrations for QCM are not target values; the manufacturer does not provide target values for urine cortisol measured with an Immulite. Instead, means are provided as an estimate.