From: Measurement of cortisol in saliva: a comparison of measurement error within and between international academic-research laboratories
Laboratory
Intra-assay CV mean (standard deviation)
Inter-assay CV
A
6.70 (4.25)
4.49
B
5.09 (4.18)
4.11
C
4.82 (6.22)
9.94
D
7.75 (11.75)
5.68
E
5.81 (4.76)
3.57
F
8.54 (8.34)
11.14
G
6.82 (5.73)
3.90
H
4.57 (4.03)
5.80
I
5.66 (6.70)
8.65