Glycated hemoglobin; Glycosylated hemoglobin; Hemoglobin - glycosylated; A1C; GHb; Glycohemoglobin; Diabetic control index
An HbA1c of 6% or less is normal.
The following are the results when the HbA1c is being used to diagnose diabetes:
If you have diabetes, try to keep your level at or below 7%. You and your health care provider must decide what a normal level is for you.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
Abnormal results mean that you have had high blood sugar levels over a period of weeks to months.
If your HbA1c is above 6.5% and you do not already have diabetes, you may be diagnosed with diabetes.
If your level is above 7% and you have diabetes, it means that your diabetes control may not be as good as it should be.
In general, the higher your HbA1c, the higher the risk that you will develop problems such as:
If your HbA1c stays high for a long period of time, the risk for these problems is even greater.
Ask your doctor how often you should have your level tested. Usually, doctors recommend testing every 3 or 6 months.
American Diabetes Association. Standards of medical care in diabetes--2011. Diabetes Care. 2011 Jan;34 Suppl 1:S11-61.
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