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Clin Biochem. 2017 Apr;50(6):270-273. doi: 10.1016/j.clinbiochem.2016.11.032. Epub 2016 Dec 5.

Association of glycated albumin to HbA1c ratio with diabetic retinopathy but not diabetic nephropathy in patients with type 2 diabetes.

Author information

1
Department of Diabetes and Metabolism, Osaka General Medical Center, Osaka, Japan.
2
Department of Internal Medicine, Hakuhokai Central Hospital, Hyogo, Japan. Electronic address: m-koga@kawanishi-city-hospital.com.

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.

KEYWORDS:

Diabetic microangipathy; Diabetic nephropathy; Diabetic retinopathy; Glycated albumin; HbA1c

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