HbA1c is the term related to diabetes mellitus. It is also known as glycated hemoglobin.
RBC-Red Blood Corpuscles carries blood throughout the body. These red blood cells contain hemoglobin. When blood sugar in the body goes in an uncontrolled level, the sugar (glucose) combines with hemoglobin and becomes glycated.
So the level indicated how far your blood glucose is controlled for the last 2 to 3 months.
The normal level is below 6%
The level between 6 to 6.4 % means pre diabetes.
And the level above 6.5% or above is confirmed diabetes.
When the level of the normal value goes up, it indicates that the risk of complication is also high.
The complications may be-
Diabetic nephropathy,
Diabetic retinopathy
Diabetic neuropathy
Women with diabetes planning for pregnancy or even pregnant women should keep the HbA1c level below 6%. And it is advisable to monitor HbA1c level monthly. It prevents the risk of congenital abnormalities in baby.