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. 2010 Jun;33(6):1379-81.
doi: 10.2337/dc09-2321. Epub 2010 Mar 9.

Association of vitamin D with insulin resistance and beta-cell dysfunction in subjects at risk for type 2 diabetes

Sheena Kayaniyil  1 , Reinhold Vieth, Ravi Retnakaran, Julia A Knight, Ying Qi, Hertzel C Gerstein, Bruce A Perkins, Stewart B Harris, Bernard Zinman, Anthony J Hanley
Affiliations

Association of vitamin D with insulin resistance and beta-cell dysfunction in subjects at risk for type 2 diabetes

Sheena Kayaniyil et al. Diabetes Care. 2010 Jun.

Erratum in

  • Diabetes Care. 2011 Jan;34(1):247

Abstract

Objective: To examine cross-sectional associations of serum vitamin D [25-hydroxyvitamin D, 25(OH)D] concentration with insulin resistance (IR) and beta-cell dysfunction in 712 subjects at risk for type 2 diabetes.

Research design and methods: Serum 25(OH)D was determined using a chemiluminescence immunoassay. Insulin sensitivity/resistance were measured using the Matsuda insulin sensitivity index for oral glucose tolerance tests (IS(OGTT)) and homeostasis model assessment of insulin resistance HOMA-IR. beta-Cell function was determined using both the insulinogenic index (IGI) divided by HOMA-IR (IGI/IR) and the insulin secretion sensitivity index-2 (ISSI-2). RESULTS Linear regression analyses indicated independent associations of 25(OH)D with IS(OGTT) and HOMA-IR (beta = 0.004, P = 0.0003, and beta = -0.003, P = 0.0072, respectively) and with IGI/IR and ISSI-2 (beta = 0.004, P = 0.0286, and beta = 0.003, P = 0.0011, respectively) after adjusting for sociodemographics, physical activity, supplement use, parathyroid hormone, and BMI.

Conclusions: Vitamin D may play a role in the pathogenesis of type 2 diabetes, as 25(OH)D concentration was independently associated with both insulin sensitivity and beta-cell function among individuals at risk of type 2 diabetes.

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