Circulating 25-hydroxyvitamin D concentrations are correlated with cardiometabolic risk among American black and white adolescents living in a year-round sunny climate

Samip Parikh, De Huang Guo, Norman K. Pollock, Karen Petty, Jigar Bhagatwala, Bernard Gutin, Chris Houk, Haidong Zhu, Yanbin Dong

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

OBJECTIVE - Low vitamin D status is common among healthy black and white adolescents residing at southern U.S. latitudes with a year-round sunny climate. Thus we aimed to study the relationships between circulating 25-hydroxyvitamin D [25(OH)D] and cardiometabolic risk factors in this population. RESEARCH DESIGN AND METHODS - 25(OH)D concentrations were measured with liquid chromatography tandem mass spectroscopy in 701 girls and boys (14-18 years old, 54% blacks, 49% females). Cardiometabolic risk was indexed by adipokines, inflammatory markers, fasting glucose, homeostatic model assessment-insulin resistance (HOMA-IR), lipid profile, and blood pressure (BP). RESULTS - Controlling for age, sex, race, sexual maturation, season, physical activity, and percent body fat, 25(OH)D concentrations were significantly correlated with adiponectin (r = 0.06, P=0.05), leptin (r = -0.32, P < 0.01), fibrinogen (r = -0.05, P = 0.03), glucose (r = -0.16, P = 0.02), HOMA-IR (r = -0.17, P < 0.01), HDL cholesterol (r = 0.14, P = 0.02), systolic BP (r = -0.10, P = 0.02), and diastolic BP (r = -0.21, P < 0.01). When 25(OH)D concentrations were stratified into increasing tertiles, there were significant linear upward trends for adiponectin (P = 0.01) and HDL cholesterol (P = 0.04), but significant linear down trends for glucose (P < 0.01), HOMA-IR (P < 0.01), and systolic BP (P < 0.01), after adjusting for the above covariates. CONCLUSIONS - Circulating 25(OH)D concentrations are associated with various adverse cardiometabolic risk factors, independent of adiposity. Clinical trials addressing the effects of vitamin D supplementation on cardiometabolic risk are warranted in adolescents irrespective of their geographical regions.

Original languageEnglish (US)
Pages (from-to)1133-1138
Number of pages6
JournalDiabetes Care
Volume35
Issue number5
DOIs
StatePublished - May 1 2012

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Advanced and Specialized Nursing

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