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eAG Equation:
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The eAG (estimated Average Glucose) equation converts HbA1c percentage to an estimated average glucose value in mg/dL. This helps patients and healthcare providers understand what the HbA1c value means in terms of daily glucose levels.
The calculator uses the eAG equation:
Where:
Explanation: The equation provides a linear conversion from HbA1c percentage to estimated average glucose levels in milligrams per deciliter.
Details: Converting HbA1c to eAG helps patients better understand their glucose control in terms of daily blood glucose measurements they are familiar with, improving diabetes management and patient engagement.
Tips: Enter HbA1c value as a percentage (e.g., 6.5, 7.0, 8.2). The value must be greater than 0.
Q1: What is the relationship between HbA1c and average glucose?
A: HbA1c reflects average blood glucose levels over the past 2-3 months. The eAG equation converts this percentage to an estimated average daily glucose value.
Q2: How accurate is the eAG conversion?
A: The conversion is based on large clinical studies and provides a good estimate, but individual variations may occur due to factors like hemoglobin variants or red blood cell turnover.
Q3: What are normal HbA1c and eAG values?
A: Normal HbA1c is below 5.7% (eAG < 117 mg/dL). Prediabetes range is 5.7-6.4% (eAG 117-137 mg/dL). Diabetes is diagnosed at 6.5% or higher (eAG ≥ 140 mg/dL).
Q4: Can this calculator be used for all patients?
A: The equation works well for most patients but may be less accurate for those with hemoglobin variants, anemia, or other conditions affecting red blood cell lifespan.
Q5: Why use both HbA1c and eAG?
A: HbA1c is the standard measurement for long-term glucose control, while eAG helps patients relate this to their daily glucose meter readings for better understanding and management.