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Med J Aust. 2011 Jul 4;195(1):45-6.

Change of HbA1c reporting to the new SI units.

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  • 1Department of Chemical Pathology, St Vincent's Hospital, Sydney, NSW.


An international consensus statement recommends that dual reporting of haemoglobin A (HbA(1c)) levels--in the current units (percentage) and Système International (SI) units (mmol/mol)--be used as an interim measure for a 2-year transition period before progressing towards the use of SI units only. This recommendation is supported by the Australasian Association of Clinical Biochemists, the Australian Diabetes Educators Association, the Australian Diabetes Society and the Royal College of Pathologists of Australasia. The SI units are a true measure of HbA(1c) and remove potential confusion between HbA(1c) values and blood glucose values.

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