Mean Blood Glucose
Some laboratories report an A1C result as a percentage together with the corresponding estimated average glucose, or eAG. The eAG calculation converts the A1C percentage into the same units used by at-home glucose meters, milligrams per decilitre or millimoles per litre. Just as A1C is an average, the eAG is a single number that represents the average blood sugar level over the past three months.
Why it matters: An A1C test measures the average amount of glucose in the blood over the past three months. A1C testing relies on haemoglobin: when glucose is present in the blood it sticks to haemoglobin, a process called glycation, and the more glucose there is, the more of it sticks. Because the test measures glucose levels over a period of time, it provides more information about blood sugar than a single blood sugar test. It remains an average, though. For people with Type 1 diabetes in particular, blood sugar can fluctuate significantly over days, weeks and months, so an A1C is not always an accurate measurement of how well management is working, and two people whose blood sugar behaves very differently can arrive at the same result.
Source · Cleveland Clinic — what it is, why it matters, what moves it
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What is Mean Blood Glucose?
Some laboratories report an A1C result as a percentage together with the corresponding estimated average glucose, or eAG. The eAG calculation converts the A1C percentage into the same units used by at-home glucose meters, milligrams per decilitre or millimoles per litre. Just as A1C is an average, the eAG is a single number that represents the average blood sugar level over the past three months.
What might a high or low Mean Blood Glucose mean?
An A1C test measures the average amount of glucose in the blood over the past three months. A1C testing relies on haemoglobin: when glucose is present in the blood it sticks to haemoglobin, a process called glycation, and the more glucose there is, the more of it sticks. Because the test measures glucose levels over a period of time, it provides more information about blood sugar than a single blood sugar test. It remains an average, though. For people with Type 1 diabetes in particular, blood sugar can fluctuate significantly over days, weeks and months, so an A1C is not always an accurate measurement of how well management is working, and two people whose blood sugar behaves very differently can arrive at the same result.
What can affect Mean Blood Glucose?
It may be higher with: Certain medications, such as steroids, which can temporarily increase blood sugar levels, Sickness, which can temporarily increase blood sugar levels.
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