Title: Reliability of serum assays of iron status in postmenopausal women.
Authors: Zeleniuch-Jacquotte, Anne; Zhang, Qi; Dai, Jisen; Shore, Roy E; Arslan, Alan A; Koenig, Karen L; Karkoszka, Jerzy; Afanasyeva, Yelena; Frenkel, Krystyna; Toniolo, Paolo; Huang, Xi
Published In Ann Epidemiol, (2007 May)
Abstract: The aim of the study is to determine the reliability during a 2-year period of several newly developed iron-related assays to assess their potential for use in prospective epidemiologic studies.We assessed the temporal reliability of several iron-related assays by using three serum samples collected at yearly intervals from 50 postmenopausal participants in a large prospective study.We observed high reliability coefficients for ferritin (0.78; 95% confidence interval [CI], 0.67-0.86), soluble transferrin receptor (sTfR; 0.79; 95% CI, 0.69-0.87), sTfR/ferritin ratio (0.74; 95% CI, 0.62-0.83), and hepcidin (0.89; 95% CI, 0.84-0.94). In a subset of 30 women, lower reliability was observed for serum iron (0.50; 95% CI, 0.29-0.70), unsaturated iron-binding capacity (0.55; 95% CI, 0.34-0.73), total iron-binding capacity (0.60; 95% CI, 0.40-0.76), and serum transferrin saturation rate (0.44; 95% CI, 0.22-0.65). The reliability of anti-5-hydroxymethyl-2'-deoxyuridine autoantibody titers, a biomarker of oxidized DNA damage, one of the mechanisms by which iron is thought to impact disease risk, was very high (0.97, 95% CI, 0.5-0.99).Our results show that some newly developed iron-related assays could be useful tools to assess iron-disease associations in prospective cohorts that collect a single blood sample.
PubMed ID: 17027294
MeSH Terms: Adult; Analysis of Variance; Autoantibodies/blood; Biomarkers/blood*; Blood Chemical Analysis/methods; Blood Chemical Analysis/standards*; Deoxyuracil Nucleotides/blood; Enzyme-Linked Immunosorbent Assay; Female; Ferritins/analysis; Ferritins/blood*; Humans; Iron/blood*; Middle Aged; New York City; Postmenopause/blood*; Prospective Studies; Reproducibility of Results; Surveys and Questionnaires; Transferrin/analysis