Variability and Reproducibility of Circulating Vitamin D in a Nationwide U.S. Population
Author(s) -
Jacqueline M. Major,
Barry I. Graubard,
Kevin W. Dodd,
Allison Iwan,
Bruce H. Alexander,
Martha S. Linet,
D. Michal Freedman
Publication year - 2012
Publication title -
the journal of clinical endocrinology and metabolism
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.206
H-Index - 353
eISSN - 1945-7197
pISSN - 0021-972X
DOI - 10.1210/jc.2012-2643
Subject(s) - intraclass correlation , vitamin d and neurology , reproducibility , medicine , population , confidence interval , spearman's rank correlation coefficient , rank correlation , vitamin d deficiency , endocrinology , vitamin , prospective cohort study , coefficient of variation , statistics , mathematics , environmental health
Most studies examining associations between circulating vitamin D and disease are based on a single measure of vitamin D, which may not reflect levels over time, particularly because vitamin D concentrations vary by season. Few studies evaluated how well multiple 25-hydroxyvitamin D [25(OH)D] measures track within the same individual over time.
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