1. What is A1C?

Hemoglobin A1C (glycated hemoglobin) reflects average blood glucose levels over the past 2-3 months. It's a crucial marker for diabetes management and diagnosis.

2. How Does the Calculator Work?

The calculator uses the ADAG formula:

Where:

• \( eAG \) — Estimated Average Glucose (mg/dL)
• 46.7 and 28.7 — Derived constants from linear regression analysis

Explanation: The formula converts average glucose levels to the A1C percentage that would be measured in a lab test.

3. Importance of A1C Measurement

Details: A1C provides a more comprehensive picture of blood sugar control than single glucose measurements and is used to diagnose diabetes and monitor treatment effectiveness.

4. Using the Calculator

Tips: Enter your average glucose level in mg/dL. The value should be based on multiple glucose measurements over time for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between A1C and eAG?
A: A1C is a percentage (e.g., 7%) while eAG is in mg/dL (e.g., 154 mg/dL). eAG represents what your average meter readings would likely be.

Q2: What are normal A1C values?
A: Normal is below 5.7%, 5.7-6.4% indicates prediabetes, and 6.5% or higher suggests diabetes.

Q3: How often should A1C be checked?
A: For diabetics, typically every 3-6 months depending on treatment plan and stability.

Q4: Are there limitations to A1C?
A: Less accurate in conditions affecting red blood cell turnover (anemia, hemoglobin variants, recent blood loss/transfusion).

Q5: Can I use this for diagnosis?
A: While helpful for estimation, formal diagnosis should always be based on laboratory testing.