Serum 25-hydroxyvitamin D concentrations are associated with prevalence of metabolic syndrome and various cardiometabolic risk factors in US children and adolescents based on assay-adjusted serum 25-hydroxyvitamin D data from NHANES 2001-2006.
Am J Clin Nutr. 2011 May 25.
Ganji V, Zhang X, Shaikh N, Tangpricha V.
Division of Nutrition, School of Health Professions, College of Health and Human Sciences, Georgia State University, Atlanta, GA.
The effect of assay drifts over time on serum 25-hydroxyvitamin D 25(OH)D concentrations were not accounted for in previous national survey studies. Thus, previously reported associations between 25(OH)D with cardiometabolic risk factors using data from NHANES were likely over- or underestimated. Moreover, associations between serum 25(OH)D and metabolic syndrome (MetSyn), insulin resistance (IR), and inflammation are unclear in children.
The relation between serum 25(OH)D and cardiometabolic risk factors in US children was investigated by using updated 25(OH)D data.
This study was based on newly updated serum 25(OH)D data, which were released by the National Center for Health Statistics in November 2010. Data from 3 cycles of NHANES (2001-2002, 2003-2004, and 2005-2006) for 5867 adolescents, aged 12-19 y, were used to study the association, by multivariate-adjusted regression, between serum 25(OH)D and prevalence of MetSyn and several cardiometabolic risk factors.
The likelihood of having MetSyn was significantly higher in the first tertile of serum 25(OH)D than in the third tertile of 25(OH)D (odds ratio: 1.71; 95% CI: 1.11, 2.65; P < 0.01).
- Waist circumference (P < 0.0001),
- systolic blood pressure (P = 0.01), and
- homeostatic model assessment-insulin resistance index (P = 0.001)
were inversely related and
- HDL cholesterol (P < 0.0001) was directly related with serum 25(OH)D.
No association was observed between 25(OH)D and C-reactive protein (P = 0.18).
On the basis of assay-adjusted data, serum 25(OH)D was significantly associated with several cardiometabolic risk factors regardless of obesity. In children, given the negative outcomes associated with poor vitamin D status and MetSyn, consideration of vitamin D supplementation in reversing
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