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Low serum selenium is associated with anemia among older women living in the community
Authors:Richard D Semba  Luigi Ferrucci  Anne R Cappola  Michelle O Ricks  Amanda L Ray  Qian-Li Xue  Jack M Guralnik  Linda P Fried
Institution:(1) The Johns Hopkins Medical Institutions, Baltimore, MD;(2) Longitudinal Studies Section, Clinical Research Branch National Institute on Aging, Bethesda, MD;(3) Epidemiology, Demography and Biometry Branch, National Institute on Aging, Bethesda, MD;(4) Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, University of Pennsylvania School of Medicine, Philadelphia, PA
Abstract:Anemia is common among older adults, and a substantial proportion of anemia in the older population is of indeterminate cause. Low selenium levels have been associated with anemia in animals, but this relationship has not been well characterized in humans. The objective was to determine whether low serum selenium concentrations are associated with anemia among older women. We conducted a cross-sectional analysis of participants in the Women's Health and Aging Studies, a population-based sample of women living in the community in Baltimore, MD, USA. Of 632 women, aged 70–79 yr, 14.1% of women were anemic (hemoglobin <120 g/L). The prevalence of anemia among women in the lowest to highest quartile of serum selenium was 22.4%, 14.6%, 11.9% and 6.6%, respectively (p<0.0001). An increase in log e selenium was associated with a reduced risk of anemia (odds ratio per 1 SD increase=0.63,95% confidence interval=0.47–0.84), adjusting for age, education, chronic disease, iron status, and serum interleukin-6. We conclude that low serum selenium is independently associated with anemia among older women living in the community.
Keywords:Aging  anemia  hemoglobin  selenium  women
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