Why the test is performed
To estimate average blood glucose exposure over roughly the previous two to three months.
World time
Laboratory Testing Online / Biochemistry
Hemoglobin A1c (HbA1c)
To estimate average blood glucose exposure over roughly the previous two to three months.Test profileBIHemoglobin A1c (HbA1c)
Test and specimen
What is being examined?
- Test
- Hemoglobin A1c (HbA1c)
- Department
- Biochemistry
- Typical sample or measurement
- EDTA whole blood
Before the test
Fasting is usually not required. Tell the clinician about anaemia, transfusion, pregnancy or known haemoglobin variants.
Clinical interpretation
Laboratory results should be interpreted by a qualified professional using the correct reference interval, method, symptoms, history and other findings. A normal or abnormal value rarely confirms or excludes a condition by itself.
What the test is used for
Screening or diagnosing diabetes in appropriate settings and monitoring longer-term glucose management.
How the test is performed
A blood sample is analysed using a standardised method that measures glycated haemoglobin as a proportion of total haemoglobin.
Conditions and diseases considered
Used for prediabetes and diabetes pathways. Some haemoglobin variants, anaemia, pregnancy, kidney disease or altered red-cell survival can affect interpretation.
Recommended further tests
Fasting plasma glucose, oral glucose tolerance test, repeat HbA1c, kidney risk assessment and lipid profile as clinically indicated.
Primary public reference
Continue with the official patient guide.
COHSEW has summarised this information for navigation and awareness. Follow the source and your healthcare provider’s current instructions for the complete context.
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