The way in which HbA1c results are reported in the UK is changing.
From 31 May 2011, HbA1c will be given in millimoles per mol (mmol/mol) instead of as a percentage (%).
HbA1c results, which measure blood glucose levels over two to three months, are currently given as a percentage.
For most people with diabetes, the HbA1c target is below 6.5 per cent, although this can vary from person to person depending on individual circumstances.
From June, people with diabetes will receive their HbA1c results in mmol/mol. The test itself will remain the same, but this new way of reporting results will make it much easier to compare readings from different laboratories and research trials throughout the world. The equivalent of the HbA1c target of 6.5 per cent will be 48 mmol/mol.
To help make this transition as easy as possible, all HbA1c results in the UK will be given in both percentage and mmol/mol from 1 June 2009 until 31 May 2011.