Lack of Association Between 25(OH)D Levels and Incident Type 2 Diabetes in Older Women

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Lack of Association Between 25(OH)D Levels and Incident Type 2 Diabetes in Older Women

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Title: Lack of Association Between 25(OH)D Levels and Incident Type 2 Diabetes in Older Women
Author: Larson, Joseph; Liu, Simin; Howard, Barbara V.; Phillips, Lawrence; Shikany, James M.; Allison, Matthew; Curb, J. David; Johnson, Karen C.; Watts, Nelson; Robinson, Jennifer G.; Manson, JoAnn Elisabeth; Song, Yiqing

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Citation: Robinson, Jennifer G., JoAnn E. Manson, Joseph Larson, Simin Liu, Yiqing Song, Barbara V. Howard, Lawrence Phillips, et al. 2011. Lack of association between 25(OH)D levels and incident type 2 diabetes in older women. Diabetes Care 34(3): 628-634.
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Abstract: Objective: To examine whether lower serum levels of serum 25-hydroxyvitamin (OH) D [25(OH)D] are associated with increased risk of developing type 2 diabetes. Research Design and Methods: A post hoc analysis of three nested case-control studies of fractures, colon cancer, and breast cancer that measured serum 25(OH)D levels in women participating in the Women’s Health Initiative (WHI) Clinical Trials and Observational Study who were free of prevalent diabetes at baseline. Diabetes was defined as self-report of physician diagnosis or receiving insulin or oral hypoglycemic medication. We used inverse probability weighting to make the study population representative of the WHI population as a whole. Weighted logistic regression models compared 25(OH)D levels (divided into quartiles, clinical cut points [<50, 50–<75, \(\geq\)75 nmol/L], or as a continuous variable) using the distribution of control subjects and adjusted for multiple confounding factors. Results: Of 5,140 women (mean age 66 years) followed for an average of 7.3 years, 317 (6.2%) developed diabetes. Regardless of the cut points used or as a continuous variable, 25(OH)D levels were not associated with diabetes incidence in either age or fully adjusted models. Nor was any relationship found between 25(OH)D and incident diabetes when evaluated by strata of BMI, race/ethnicity, or randomization status in the Calcium Vitamin D trial. Conclusions: Lower serum 25(OH)D levels were not associated with increased risk of developing type 2 diabetes in this racially and ethnically diverse population of postmenopausal women.
Published Version: doi:10.2337/dc10-1632
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3041195/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10304405
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