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  • Title: Association of glycated albumin to HbA1c ratio with diabetic retinopathy but not diabetic nephropathy in patients with type 2 diabetes.
    Author: Umayahara Y, Fujita Y, Watanabe H, Kasai N, Fujiki N, Hatazaki M, Koga M.
    Journal: Clin Biochem; 2017 Apr; 50(6):270-273. PubMed ID: 27923630.
    Abstract:
    OBJECTIVES: The ratio of glycated albumin to HbA1c (GA/HbA1c ratio) is a known indicator that reflects fluctuations in plasma glucose. In this study, the association of the GA/HbA1c ratio to diabetic nephropathy and diabetic retinopathy in patients with type 2 diabetes was investigated. DESIGN AND METHODS: Among patients with type 2 diabetes, 613 patients (364 males and 249 females, aged 63.2±12.5, body mass index (BMI) 25.4±4.8kg/m2) were enrolled. Patients with overt proteinuria, reduced renal function, or anemia were excluded. RESULTS: In a comparison between patients with and without diabetic nephropathy, significance was observed in insulin therapy, HbA1c, and GA. In addition, in a comparison between patients with and without diabetic retinopathy, the GA/HbA1c ratio along with insulin therapy, HbA1c, and GA showed significant differences. When the GA/HbA1c ratios were divided into three groups and compared, the rates of diabetic nephropathy did not show any significance, while the rate of diabetic retinopathy increased significantly as the GA/HbA1c ratio increased. In multivariable analyses, while insulin therapy and BMI were the significant independent variables for diabetic nephropathy, insulin therapy and the GA/HbA1c ratios were the significant independent variable for diabetic retinopathy. CONCLUSIONS: The GA/HbA1c ratio was associated with diabetic retinopathy, but not with diabetic nephropathy in patients with type 2 diabetes. These results suggest that the development and progression of diabetic retinopathy is associated with plasma glucose fluctuations.
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