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ADA eAG Equation:
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The American Diabetes Association (ADA) A1c Calculator converts hemoglobin A1c percentage values to estimated average glucose (eAG) in mg/dL. This helps patients and healthcare providers understand A1c results in terms of daily glucose levels.
The calculator uses the ADA equation:
Where:
Explanation: The equation provides a linear conversion between A1c percentage and estimated average glucose levels over the preceding 2-3 months.
Details: Converting A1c to eAG helps patients better understand their diabetes control by relating laboratory results to daily glucose meter readings they are familiar with.
Tips: Enter the HbA1c percentage value. The calculator will provide the estimated average glucose in mg/dL. Valid A1c values typically range from 4% to 15%.
Q1: What is the relationship between A1c and average glucose?
A: A1c represents the average blood glucose level over the past 2-3 months. The ADA equation converts this percentage to an estimated average glucose value in mg/dL.
Q2: What are target A1c and eAG levels?
A: For most adults with diabetes, the target A1c is less than 7% (eAG <154 mg/dL). Individual targets may vary based on specific health conditions.
Q3: How often should A1c be tested?
A: The ADA recommends A1c testing at least twice yearly for stable patients and quarterly for those not meeting treatment goals or with therapy changes.
Q4: Are there limitations to this conversion?
A: The equation provides an estimate. Individual variations in red blood cell lifespan and other factors can affect the relationship between A1c and average glucose.
Q5: Can this calculator be used for diagnosis?
A: No, this is an educational tool. Diabetes diagnosis and management should always be done under medical supervision with proper laboratory testing.