Wednesday, October 30, 2013

Correlating A1C To Average Blood Glucose (And Vice Versa)

It might be easier to understand a hemoglobin A1C (HbA1C or just A1C) reading if it was given in the same units as blood sugar. There are calculators that can correlate your A1C to an average blood glucose value, or, as the American Diabetes Association (ADA) calls it, an "estimated average glucose" or eAG.

Here's the ADA's calculator. (The image should take you to their site.)

The ADA gives the relationship between A1C and eAG as: 28.7 x A1C – 46.7 = eAG.

Which works out to:

While I'm at it, here's ACCU-Chek's calculator. (The image should take you to their site.)

ACCU-Chek's caveat is important:
"This tool uses average plasma blood sugar readings — the measure used by most meters available today. It should not be used to predict an A1C and is not a substitute for a clinical test performed by your doctor. It is intended to show the relationship between a healthy A1C and self-monitoring results, and give you an idea of how you can help prevent long-term diabetes complications."