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  • Title: Association of vascular risk factors with increasing glycemia even in normoglycemic subjects in an older Chinese population: the Guangzhou Biobank Cohort Study.
    Author: Thomas GN, Jiang CQ, McGhee SM, Zhang WS, Lao XQ, Schooling M, Adab P, Lam TH, Cheng KK, Guangzhou Biobank Cohort Study Steering Committee.
    Journal: Metabolism; 2006 Aug; 55(8):1035-41. PubMed ID: 16839838.
    Abstract:
    Hyperglycemia increases cardiovascular disease risk, but the association between increasing glycemia and cardiovascular risk factors, angina, and coronary heart disease in normoglycemic subjects is less clear, particularly in Chinese. We report on possible associations in a large group of Mainland Chinese subjects. A total of 10,400 older subjects (> or = 50 years) were recruited, and vascular risk factors were measured, including anthropometry, blood pressure, and fasting plasma biochemical factors including glucose, lipid profile, and C-reactive protein (CRP). Subjects were categorized by glycemic status, and the relationship between glycemia and cardiovascular risk factors was investigated using analysis of variance and multiple linear regression analyses. Tertiles of fasting glucose levels showed a clear positive relationship with cardiovascular risk factors including age, obesity, blood pressure, lipid levels, and CRP (P < .001 for all). The overall prevalence of self-reported vascular disease was low, but significantly associated with increasing glycemia. Multiple regression showed that waist circumference (standardized regression coefficient beta = .10, P < .001), triglycerides (beta = 0.16, P < .001), CRP (beta = 0.06, P < .001), female sex (beta = .03, P = .007), high-density lipoprotein cholesterol (beta = -.02, P = .016), and mean arterial pressure (beta = .06, P < .001) were independently associated with fasting glucose levels. Among the normoglycemic subjects (n = 5190), increasing glycemia was still associated with increasing obesity indices, systolic blood pressure, triglyceride, and CRP levels (all P < .05). Increasing glycemia, even in the reference range, is associated with increasing prevalence of vascular risk factors. Control of these risk factors, particularly obesity, the most important avoidable independent determinant of glycemia in normoglycemic subjects, is critical to reduce the risk of the associated vascular disease.
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