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Blood glucose and coronary artery disease in nondiabetic patients

Christopher Nielson1, Theodore Lange, Nicholas Hadjokas

  • 1University of Nevada Reno School of Medicine, Reno, Nevada, USA. cnielson@med.unr.edu

Diabetes Care
|April 29, 2006
PubMed

Insights

Even without diabetes, higher blood glucose levels increase the risk of coronary artery disease (CAD). This study found elevated fasting glucose is linked to a greater incidence of myocardial infarction and other cardiovascular events.

Area of Science:

  • Cardiology
  • Endocrinology
  • Preventive Medicine

Background:

  • Coronary artery disease (CAD) is a leading cause of mortality worldwide.
  • The role of borderline glucose elevations in non-diabetic individuals regarding CAD risk is not fully understood.
  • Early identification of risk factors is crucial for preventive cardiology.

Purpose of the Study:

  • To investigate the association between modest elevations in blood glucose and the incidence of coronary artery disease (CAD) in nondiabetic patients.
  • To determine if higher fasting glucose levels predict future cardiovascular events.
  • To quantify the risk associated with elevated glucose in the absence of diagnosed diabetes.

Main Methods:

  • A retrospective analysis of 24,160 nondiabetic patients was conducted.
  • Baseline morning blood glucose levels were measured and correlated with subsequent CAD events (myocardial infarction, angina, nitrate prescriptions) occurring over one year later.
  • Statistical models, including Cox proportional hazards and Kaplan-Meier analysis, were used, adjusting for various cardiovascular risk factors.

Main Results:

  • Higher baseline blood glucose (100-126 mg/dl) was significantly associated with increased rates of myocardial infarction (53.9%), acute coronary syndrome (18.6%), and nitrate prescriptions (26.4%).
  • Elevated fasting glucose (>100 mg/dl) independently predicted new CAD, with a hazard ratio of 1.13 (95% CI 1.05-1.21) after adjusting for confounders.
  • Kaplan-Meier analysis demonstrated a progressive increase in CAD risk over time with higher baseline glucose levels.

Conclusions:

  • Nondiabetic individuals with higher baseline blood glucose levels face a significantly elevated risk of developing coronary artery disease.
  • These findings highlight the importance of monitoring glucose levels even in the absence of diabetes for cardiovascular risk assessment.
  • Modest hyperglycemia may represent a critical, yet often overlooked, risk factor for CAD development.
Abstract

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