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HbA1c and heart failure risk among diabetic patients

Wenhui Zhao1, Peter T Katzmarzyk, Ronald Horswell

  • 1Pennington Biomedical Research Center (W.Z., P.T.K., R.H., Y.W., G.H.), Baton Rouge, Louisiana 70808; and Louisiana State University Health Baton Rouge (J.J.), Baton Rouge, Louisiana 70808.

The Journal of Clinical Endocrinology and Metabolism
|December 4, 2013
PubMed

Insights

Higher glycosylated hemoglobin (HbA1c) levels are linked to increased heart failure (HF) risk in diabetic patients. This association holds true across different races and demographic groups, emphasizing the importance of glycemic control.

Area of Science:

  • Cardiology
  • Endocrinology
  • Public Health

Background:

  • Diabetes mellitus is a significant independent risk factor for developing heart failure (HF).
  • The impact of strict glycemic control on HF incidence in diabetic populations remains unclear.
  • Understanding race-specific risks is crucial for targeted interventions.

Purpose of the Study:

  • To examine the association between varying levels of glycosylated hemoglobin (HbA1c) and incident heart failure (HF) risk.
  • To investigate potential race-specific differences in this association among diabetic patients.
  • To determine if glycemic control influences HF risk across diverse demographic subgroups.

Main Methods:

  • Prospective study design involving 17,181 African American and 12,446 white diabetic patients.
  • HbA1c levels measured at baseline, with follow-up for incident HF over an average of 6.5 years.
  • Multivariable analyses adjusted for various clinical and demographic factors.

Main Results:

  • A graded positive association was observed between higher HbA1c levels and increased HF risk in both African American and white diabetic patients.
  • Hazard ratios for HF increased progressively with higher HbA1c categories (≥10.0% associated with significantly higher risk).
  • This association persisted across subgroups, including those with and without glucose-lowering agents, and different age, gender, and smoking statuses.

Conclusions:

  • Elevated HbA1c levels demonstrate a consistent, graded positive association with heart failure risk in both African American and white diabetic individuals.
  • These findings underscore the importance of achieving optimal glycemic control to mitigate HF risk in diabetic patients.
  • The study highlights the need for race-conscious approaches in managing diabetes to prevent cardiovascular complications.
Abstract

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