HbA1c - changing units

Caroline Day, Clifford J. Bailey

Research output: Contribution to journalArticlepeer-review


Measurement of glycated haemoglobin A (HbA) provides an indication of longer-term glycaemic control. Standardisation of this test between laboratories is difficult to achieve, and most assays are currently calibrated to the values used in the Diabetes Control and Complications Trial (DCCT-aligned). With the availability of more specific reference standards it is now proposed that HbA is expressed as mmol HbA per mol of non-glycated haemoglobin. An HbA of 7% is approximately equal to 53 mmol/mol.
Original languageEnglish
Pages (from-to)134-136
Number of pages3
JournalBritish Journal of Diabetes and Vascular Disease
Issue number3
Publication statusPublished - May 2009


  • estimated average glucose
  • glycaemic control
  • glycated haemoglobin
  • HbA1C
  • HbA1C units


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