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<blockquote data-quote="Mr_Pot" data-source="post: 2380669" data-attributes="member: 216415"><p>HbA1c does not measure blood glucose it measures the percentage of haemoglobin with glucose molecules attached, which is a proxy for the average blood glucose level over the 2-3 months lifetime of the red cells. The relationship was derived by experiment, a large number of people had their BG measured over a period of time and this was compared with their HbA1c to derive a table of approximate equivalence. So for an individual it is possible their HbA1c will not be an accurate indication of their average BG due to variables like lifetime of their red blood cells, anaemia etc. This is apart from any actual accuracy of the HbA1c test with differing results from different laboratories.</p></blockquote><p></p>
[QUOTE="Mr_Pot, post: 2380669, member: 216415"] HbA1c does not measure blood glucose it measures the percentage of haemoglobin with glucose molecules attached, which is a proxy for the average blood glucose level over the 2-3 months lifetime of the red cells. The relationship was derived by experiment, a large number of people had their BG measured over a period of time and this was compared with their HbA1c to derive a table of approximate equivalence. So for an individual it is possible their HbA1c will not be an accurate indication of their average BG due to variables like lifetime of their red blood cells, anaemia etc. This is apart from any actual accuracy of the HbA1c test with differing results from different laboratories. [/QUOTE]
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