1. What is the eAG Formula?

The eAG (estimated Average Glucose) formula converts HbA1c percentage to an estimated average glucose value in mg/dL. This provides a more intuitive understanding of average blood glucose levels over the previous 2-3 months.

2. How Does the Calculator Work?

The calculator uses the eAG formula:

Where:

• \( HbA1c \) — Glycated hemoglobin percentage
• 28.7 — Conversion coefficient
• 46.7 — Adjustment factor

Explanation: The formula provides an estimated average glucose level that corresponds to the HbA1c measurement, helping patients better understand their glucose control.

3. Importance of eAG Calculation

Details: Converting HbA1c to eAG helps patients relate their long-term glucose control to daily glucose measurements, improving diabetes management and treatment adherence.

4. Using the Calculator

Tips: Enter HbA1c value as a percentage. The value must be valid (greater than 0). The calculator will provide the estimated average glucose in mg/dL.

5. Frequently Asked Questions (FAQ)

Q1: Why convert HbA1c to eAG?
A: eAG provides glucose values in familiar units (mg/dL) that patients use with their daily glucose meters, making HbA1c results more understandable.

Q2: How accurate is the eAG conversion?
A: The formula provides a good estimate based on population studies, but individual variations may occur due to differences in red blood cell lifespan and other factors.

Q3: What is the relationship between HbA1c and average glucose?
A: HbA1c represents the average percentage of hemoglobin that has glucose attached over the past 2-3 months, while eAG converts this to an average glucose value.

Q4: Are there different conversion formulas?
A: Yes, different organizations may use slightly different coefficients, but the ADAG study formula (28.7 × HbA1c - 46.7) is widely accepted.

Q5: Can eAG be used for treatment decisions?
A: eAG should be used as an educational tool alongside HbA1c values, not as a replacement for clinical decision making based on HbA1c measurements.