The HbA1c test (also called A1C, glycated hemoglobin, or hemoglobin A1c) is a blood test that measures your average blood sugar (glucose) level over the previous 2–3 months. It is commonly used to diagnose diabetes, identify prediabetes, and monitor blood sugar control in people with diabetes.
N
NIDDK
+1
Why is the HbA1c test done?
To screen for diabetes in people at risk.
To diagnose prediabetes or type 2 diabetes.
To monitor how well diabetes treatment is working over time.
N
NIDDK
+1
Normal HbA1c values
HbA1c (%) Interpretation
Below 5.7% Normal
5.7%–6.4% Prediabetes
6.5% or higher Diabetes (usually confirmed with a repeat test unless symptoms are present)
Target for people with diabetes
For many adults with diabetes, the usual goal is below 7%, though the ideal target may differ depending on age, overall health, pregnancy, and other medical conditions. Your healthcare provider will recommend the target that's right for you.
A
American Diabetes Association
+1
How is the test performed?
A small blood sample is taken from a vein or, in some cases, by a finger prick.
Fasting is not required, so you can eat and drink normally before the test.
M
MedlinePlus
+1
How often should it be done?
Without diabetes: As recommended by your healthcare provider if you are at risk.
With stable diabetes: Usually every 6 months.
If treatment has changed or blood sugar is not well controlled: Every 3 months.
M
MedlinePlus
+1
Factors that can affect HbA1c results
The test may be less accurate in some situations, including:
Certain types of anemia
Recent significant blood loss or blood transfusion
Kidney disease
Some hemoglobin disorders (such as sickle cell disease)
Pregnancy in certain situations
N
NIDDK
+1
If you have an HbA1c result and would like help interpreting it, tell me the percentage (for example, 5.9%, 6.8%, or 8.2%) along with your age and whether you have diabetes.in nidan pathology laboratory @location
