Mean intrabatch and interbatch coefficients of variation were 5.8 and 13.1%, respectively, for E2 (at a concentration of 250 pmol/l), 10.2 and 12.6% for E1 (at 75 pmol/l), and 4.8 and 18.9% for Δ4 (at 1.40 nmol/l), 10.8 and 15.3% for T (at 1.40 nmol/l).
The median intrabatch coefficient of variation (CV) was 6 (range, 3 16) and the median interbatch CV was 37 (range, 17 165).
Based on the masked quality control samples provided by each cohort, the median interbatch coefficient of variation was 13.2% (range: 4.8%–17.0%), and the median intrabatch coefficient of variation was 9.9% (range: 3.8%–16.4%).
For all cohorts except the Nurses Health Studyy, the median intrabatch coefficient of variation was 9.9% (range: 3.8%–16.4%), and the median interbatch coefficient of variation was 13.2% (range: 4.8%–17.0%).
The median interbatch coefficient of variation for the cohort quality control samples was 13.2% (range: 4.8%–17.0%); the median intrabatch coefficient of variation for the cohort quality control samples was 9.9% (range: 3.8%–16.4%).
Intrabatch coefficients of variation (CVs) were 4%to10%0%, and interbatch CVs were 6%to16%6%to16%
Inter- and intrabatch coefficients of variation for NIST level-1 samples were 12.7% and 9.3%, respectively; inter- and intrabatch coefficients of variation for NIST level-2 samples were 13.6% and 11.0%, respectively.
Interbatch and intrabatch coefficients of variation for level 1 samples were 12.7% and 9.3%, respectively; interbatch and intrabatch coefficients of variation for level 2 samples were 13.6% and 11.0%, respectively.
As reported in Gallicchio et al. (18) for the VDPP, interbatch and intrabatch coefficients of variation for low-level samples were 12.7% and 9.3%, respectively; interbatch and intrabatch coefficients of variation for normal-level samples were 13.6% and 11.0%, respectively.
Interbatch and intrabatch coefficients of variation for NIST level 1 samples were 12.7% and 9.3%, respectively; interbatch and intrabatch coefficients of variation for NIST level 2 samples were 13.6% and 11.0%, respectively.
