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HbA1c

Glycated Haemoglobin Glycosylated Haemoglobin A1c
EDTA whole blood mmol/mol (or %)

About this test

Reflects average blood glucose over the preceding 2–3 months. Preferred for diabetes diagnosis and monitoring of glycaemic control.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs < 42 Normal <42 mmol/mol (<6%). Pre-diabetes: 42–47; Diabetes diagnosis: ≥48 mmol/mol (≥6.5%)

Clinical Interpretation

High / Increased
Poor glycaemic control in diabetes, pre-diabetes, Cushing's syndrome, haemochromatosis. Falsely elevated with prolonged RBC survival; falsely low in haemolysis, sickle cell, G6PD deficiency.

Related Tests

Fasting Insulin C-Peptide
Specimen
EDTA whole blood
Reporting Unit
mmol/mol (or %)
Category
🧪 Clinical Biochemistry

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.