alexa Serum ferritin and risk of the metabolic syndrome in U.S. adults.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Jehn M, Clark JM, Guallar E

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Abstract OBJECTIVE: We examined the relationship among iron stores, the metabolic syndrome, and insulin resistance. RESEARCH DESIGN AND METHODS: We conducted a cross-sectional study of 6,044 adults >20 years of age who participated in the Third National Health and Nutrition Examination Survey. Metabolic syndrome was defined as the presence of at least three of the following: elevated blood pressure, low HDL cholesterol, elevated serum triglycerides, elevated plasma glucose, and abdominal obesity. Insulin resistance was estimated using homeostasis model assessment (for insulin resistance), fasting insulin, and triglyceride-to-HDL cholesterol ratio. RESULTS: After excluding individuals with likely hemochromatosis, mean serum ferritin values in premenopausal women, postmenopausal women, and men were 33.6, 93.4, and 139.9 microg/l, respectively. Metabolic syndrome was more common in those with the highest compared with the lowest levels of serum ferritin in premenopausal women (14.9 vs. 6.4\%, P = 0.002), postmenopausal women (47.5 vs. 28.2\%, P < 0.001), and men (27.3 vs. 13.8\%, P < 0.001). Insulin resistance also increased across quartiles of serum ferritin for men and postmenopausal women and persisted after adjustment for age, race/ethnicity, C-reactive protein, smoking, alcohol intake, and BMI. CONCLUSIONS: Elevated iron stores were positively associated with the prevalence of the metabolic syndrome and with insulin resistance. Copyright 2004 American Diabetes Association
This article was published in Diabetes Care and referenced in Journal of Diabetes & Metabolism

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