Retinal microvascular calibre and risk of incident diabetes: the multi-ethnic study of atherosclerosis |
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Authors: | Yau Joanne Wen Yee Xie Jing Lamoureux Ecosse Klein Ronald Klein Barbara E K Cotch Mary Frances Bertoni Alain G Shea Steven Wong Tien Y |
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Affiliation: | a Centre for Eye Research Australia, The Royal Victorian Eye and Ear Hospital, University of Melbourne, Australia b Singapore Eye Research Institute, Singapore National Eye Centre, Singapore c Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, United States d Division of Epidemiology and Clinical Applications, National Eye Institute, National Institutes of Health, Bethesda, MD, United States e Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston-Salem, NC, United States f Departments of Medicine and Epidemiology, Columbia University, New York, NY, United States |
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Abstract: | AimTo prospectively examine the association of retinal microvascular signs with incident diabetes and impaired fasting glucose (IFG) in a multi-ethnic population-based cohort.MethodsThe multi-ethnic study of atherosclerosis comprised Caucasians, African-Americans, Hispanics and Chinese aged 45-84 years. Retinal vascular calibre and retinopathy were quantified from baseline retinal photographs. Incident diabetes and IFG were ascertained prospectively.ResultsAfter a median follow-up of 3 years, 243 (4.9%) people developed diabetes and 565 (15.0%) developed IFG. After adjusting for known risk factors, participants with wider retinal arteriolar calibre had a higher risk of developing diabetes HR: 1.60; 95% CI: 1.12-2.29, p = 0.011 comparing highest with lowest arteriolar calibre tertile]. In ethnic subgroup analysis, the association between wider retinal arteriolar calibre and incident diabetes was stronger and statistically significant only in Caucasians HR: 2.78; 95% CI: 1.37-5.62, p = 0.005]. Retinal venular calibre and retinopathy signs were not related to risk of diabetes or IFG.ConclusionWider retinal arteriolar calibre is independently associated with an increased risk of diabetes, supporting a possible role for early arteriolar changes in diabetes development. This effect was largely seen in Caucasians, and not in other ethnic groups, and may reflect ethnic differences in susceptibility to diabetes from microvascular pathways. |
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Keywords: | Retinal microvascular calibre Retinopathy Diabetes Impaired fasting glucose |
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