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eAG Equation:
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The eAG (estimated Average Glucose) equation converts HbA1c percentage to an average blood glucose value in mg/dL. This helps patients and healthcare providers better understand what HbA1c results mean in terms of daily glucose levels.
The calculator uses the eAG equation:
Where:
Explanation: The equation provides an estimated average glucose level that corresponds to the HbA1c measurement, helping translate laboratory results into more clinically meaningful values.
Details: Converting HbA1c to eAG helps patients better understand their glucose control in familiar units (mg/dL), which can improve diabetes management and adherence to treatment plans.
Tips: Enter HbA1c value as a percentage (e.g., 6.5). The calculator will provide the corresponding estimated average glucose in mg/dL.
Q1: How accurate is the eAG conversion?
A: The eAG provides a good estimate but may not match every individual's actual average glucose due to biological variations in glucose metabolism.
Q2: What is the relationship between HbA1c and average glucose?
A: HbA1c reflects average blood glucose levels over the past 2-3 months, with each 1% change in HbA1c corresponding to approximately 30 mg/dL change in average glucose.
Q3: Why are there different conversion formulas?
A: Different studies have produced slightly different coefficients, but the ADAG study formula (28.7 × HbA1c - 46.7) is widely accepted and used.
Q4: Can eAG be used for all patient populations?
A: The conversion is generally reliable for most patients but may be less accurate in conditions that affect red blood cell turnover, such as anemia or hemoglobin variants.
Q5: How often should HbA1c be tested?
A: The American Diabetes Association recommends testing HbA1c at least twice yearly for stable patients and quarterly for those whose therapy has changed or who are not meeting treatment goals.