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10.11.2018 | Original Article

Diabetic retinopathy grade as a predictive marker of severity of cardiovascular disease and mortality: DIVERSE Study Group

Zeitschrift:
International Journal of Diabetes in Developing Countries
Autoren:
Kiran Shah, Sundaram Natarajan, Milind Phadke, Onkar C Swami

Abstract

Patients with diabetic retinopathy (DR) are more likely to have subclinical cardiovascular disease. Objective of this study was to assess the prevalence and association of DR grades along with comorbidities in patients with established cardiovascular disease (CVD); association of DR grades beyond ocular morbidity, i.e., long-term outcomes among established CVD; influence of DR grades on prognosis in patients undergoing coronary revascularization. This was a single center, retrospective, data analysis of T2DM patients with established CVD. Goodness of fit was analyzed using Pearson’s chi-square test. DR was observed in 64% (n = 2560) of patients (non-proliferative diabetic retinopathy [NPDR] 37%; proliferative diabetic retinopathy [PDR] 27%). DR and CVD were strongly associated; highest association was observed for congestive heart failure (CHF) (n = 1325), followed by myocardial infarction (MI) (n = 795), unstable angina (UA) (n = 275), and cardiomyopathy (n = 165) (p < 0.00001). Patients with NPDR have greater risk of CHF, MI, UA, and cardiomyopathy vs. PDR [HR 1.32, 1.44, 1.2, and 1.75 respectively]. Five-year all-cause mortality was significantly higher in patients with DR (94.2%; n = 766) vs. that in patients with non-DR (5.78%; n = 47) (p < 0.00001). NPDR patients undergoing CABG (n = 765) had lower 5-year mortality than those underwent PTCA (n = 615) (8.36% vs. 25.85%, p < 0.00001).Three times lower 5-year mortality rate was noted in patients with PDR undergoing CABG vs. that in patients undergoing PTCA (n = 265) (25.3 vs. 72.2%, p < 0.00001). DR was strongly associated with CVD with highest association with CHF, followed by MI, UA, and cardiomyopathy. Cardiovascular events, cerebrovascular events, mortality, and all-cause mortality were higher in patients with DR. Higher risk of mortality was noted in NPDR patients who underwent PTCA than in NPDR patients who underwent CABG.

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