Serum 25-hydroxyvitamin D levels and the metabolic syndrome in older persons. A population-based study.
Clin Endocrinol (Oxf). 2011 May 20. doi: 10.1111/j.1365-2265.2011.04110.x.
Oosterwerff MM, Eekhoff EM, Heymans MW, Lips P, van Schoor NM.
Department of Internal Medicine, Section Endocrinology EMGO Institute for Health and Care Research,VU University Medical Center, 1081 HV Amsterdam, The Netherlands.
Background? Recent evidence indicates that a lower plasma level of 25-hydroxyvitamin D (25OHD) is associated with a higher risk of the metabolic syndrome. It has not been studied in older people with a high prevalence of vitamin D insufficiency.
Objective:? This study investigates the association between vitamin D status and the metabolic syndrome in community-dwelling older persons in the Netherlands.
Design and patients? The study is part of the Longitudinal Aging Study Amsterdam, an ongoing cohort study in a representative sample of Dutch older persons. A total of 1286 subjects (629 men and 657 women) between the ages of 65 and 88 yr participated in the study. Measurements? Metabolic syndrome (U.S. National Cholesterol Education Program definition) and its individual components were assessed as well as serum 25OHD levels.
Results? Among the participants, the prevalence of the metabolic syndrome was 37.0%. The mean 25OHD level was 53.3 nmol/l. 47.8% had 25OHD levels below 50 nmol/l. There was a significantly increased risk for the metabolic syndrome in the subjects with serum 25OHD levels below 50 nmol/l, compared to subjects with levels over 50 nmol/l odds ratio (OR)=1.54; 95% confidence interval (CI) 1.23-1.94. After adjustment for confounders, age, sex, season, years of education, alcohol use, total activity, smoking and PTH the OR was 1.29 (95% CI 1.00-1.68).
The association between vitamin D deficiency and the metabolic syndrome was mainly determined by the components low HDL and (high) waist circumference.
Conclusions:? Vitamin D deficiency is common in the older population in the Netherlands and subjects with serum 25OHD below 50 nmol/l have a higher risk of the metabolic syndrome.
Copyright © 2011 Blackwell Publishing Ltd.
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