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Intrapersonal HbA(1c) variability and the risk of progression of nephropathy in patients with Type 2 diabetes

S Rodríguez-Segade1, J Rodríguez, J M García López

  • 1Department of Biochemistry and Molecular Biology, The University Hospital, Santiago de Compostela, Spain. ssegade@telefonica.net

Diabetic Medicine : a Journal of the British Diabetic Association
|August 24, 2012
PubMed

Insights

High HbA1c variability, not just the average, significantly increases nephropathy progression risk in Type 2 diabetes patients. This finding highlights the importance of stable blood sugar control for kidney health.

Area of Science:

  • Nephrology
  • Endocrinology
  • Diabetology

Background:

  • Diabetic nephropathy is a major complication of Type 2 diabetes.
  • Glycemic control, particularly HbA1c levels, is crucial for managing diabetic complications.
  • The impact of HbA1c variability on nephropathy progression requires further investigation.

Purpose of the Study:

  • To examine the association between HbA1c variability and the risk of nephropathy progression in Type 2 diabetes patients.
  • To determine if HbA1c variability independently predicts nephropathy progression.

Main Methods:

  • A cohort of 2103 Type 2 diabetes patients was followed for a mean of 6.6 years.
  • Albumin excretion rate and HbA1c measurements were used to assess nephropathy and glycemic variability.
  • Multivariate Cox regression analysis was employed to evaluate the risk of nephropathy progression, adjusting for numerous confounding factors.

Main Results:

  • Nephropathy progressed in 18.3% of the study participants.
  • Patients with progressing nephropathy exhibited significantly higher HbA1c variability compared to non-progressors.
  • HbA1c variability emerged as a significant independent predictor of nephropathy progression (HR 1.37, 95% CI 1.12-1.69).

Conclusions:

  • Increased HbA1c variability is a significant risk factor for nephropathy progression in Type 2 diabetes.
  • This association persists independently of the updated mean HbA1c.
  • Managing glycemic variability is essential for preventing diabetic kidney disease progression.
Abstract

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