Your guess was right on!
The International HbA1c Consensus Committee recommends that all HbA1c levels be reported in SI units (mmol/mol, no decimal places) — with results directly traceable to the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) reference method — and in the currently used, National Glycohemoglobin Standardization Program (NGSP) units (percentage, one decimal place). We recommend that dual reporting in Australia begins in July 2011, and that reporting of percentages ceases 2 years later. In New Zealand, dual reporting commenced in August 2009.
The key reasons for implementing this recommendation in Australia are that:
- the SI units relate to a scientifically valid measure of HbA1c;
- the SI units remove potential confusion between HbA1c values as a percentage and blood glucose values in mmol/L;
- the change is in keeping with the international consensus statement;1 and
- the change has already been initiated in New Zealand and a number of countries in the European Union.
I guess not so in North America. I don't know about Singapore. LOL!