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Change of HbA1c reporting to the new SI units
Graham R D Jones1, George Barker, Ian Goodall
1Department of Chemical Pathology, St Vincent's Hospital, Sydney, NSW. gjones@stvincents.com.au
The Medical Journal of Australia
|July 7, 2011
Summary
International guidelines recommend dual reporting of haemoglobin A1c (HbA1c) levels in both percentage and SI units (mmol/mol) for two years. This transition aims to improve clarity and accuracy in diabetes management.
Area of Science:
- Clinical Biochemistry
- Endocrinology
- Diabetes Mellitus Research
Background:
- Current reporting of haemoglobin A1c (HbA1c) uses percentage units.
- Potential confusion exists between HbA1c and blood glucose values.
- International bodies are moving towards standardized reporting.
Purpose of the Study:
- To communicate the international consensus on HbA1c reporting.
- To recommend a transition period for adopting Système International (SI) units.
- To highlight the benefits of SI units for HbA1c measurement.
Main Methods:
- Consensus statement development.
- Review of current HbA1c reporting practices.
- Adoption of recommendations by professional organizations.
Main Results:
- Dual reporting of HbA1c in percentage and SI units (mmol/mol) is recommended.
- A 2-year transition period is advised before exclusive use of SI units.
- SI units provide a more accurate measure of HbA1c.
Conclusions:
- The transition to SI units for HbA1c reporting is crucial.
- Dual reporting minimizes confusion during the interim period.
- Standardized HbA1c measurement enhances diabetes care and research.
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