DOI: 10.2337/dc07-1926
Proliferative Diabetic Retinopathy in Type 2 Diabetes is Related to Coronary Artery Calcium in the Veterans Affairs Diabetes Trial (VADT)
1Carl T Hayden VAMC Peter.Reaven{at}va.gov ABSTRACT Objective: Increasing evidence suggests that macrovascular disease and retinopathy (RET) may be more closely linked than previously believed. We determined the relationship between RET and coronary atherosclerosis as measured by CT detectable coronary artery calcium (CAC). Research Design and Methods: The cross-sectional association between CAC and RET was assessed on a VADT sub-sample of 204 subjects with a mean duration of type 2 diabetes of 12.3 ± 8.3 years. Results: RET was correlated with CAC (r=0.19, p=0.006). Median CAC increased across RET categories: 197 in those with no RET, 229 with microaneurysms only, 364 with mild non-proliferative diabetic RET (NPDR), 300 with moderate to severe NPDR, and 981 in those with proliferative diabetic RET (PDR). Stepwise multivariable linear regression analysis was performed to find a parsimonious subset of relevant risk factors to include along with PDR in predicting CAC. After adjustment for either this subset of standard factors (p = 0.047) or a more extensive panel of risk factors (p = 0.035), PDR was significantly associated with CAC. Moreover, using logistic regression, individuals with PDR were approximately 6 fold more likely to have CAC > 400 compared to those with no PDR, even after adjustment for other CVD risk factors. Conclusions: These data indicate an important relationship between RET and extent of coronary atherosclerosis (CAC), and suggest the potential to identify and treat shared risk factors for these common micro- and macrovascular complications.
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