Estimated average glucose: what it consists of

The estimated average glucose is a number that is obtained by calculation. It associates the results of daily monitoring with the A1c test.

Estimated Average Glucose or eAG is a number that represents the estimated mean value of sugar (glucose) in the blood, over a period of 2 to 3 months. This number is calculated based on the results of a blood test known as glycosylated hemoglobin (HbA1c or A1c).

It is important to keep in mind that blood glucose levels are not constant, but rather vary throughout a day. Therefore, a single measurement can be misleading.

Long-term blood sugar is measured by a blood test called the A1c. This test allows detecting the percentage of glycosylated hemoglobin.

Hemoglobin as such is a protein that is in red blood cells and to which glucose adheres. The test determines the proportion of hemoglobin that has glucose attached to it.

According to the American Diabetes Association, it is best to have an A1c blood test 2 times a year. If the treatment does not work or a change is made in the doses, it must be done 4 times that year.

Daily monitoring of diabetes should always be maintained. This offers an instant view. However, it does not provide valid long-term data.