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<blockquote data-quote="tubolard" data-source="post: 34472" data-attributes="member: 9741"><p>I think the short answer to that is that there is no clearly agreed definition of what a non-diabetic HbA1c is. Bernstein suggests 4.2% to 4.6%, another suggestion has been 3.5% to 5.5%, I have seen 4.6% to 6.4%, and another study suggests a mean of 5.3%. The NHS target for diabetics is that 50% of people with diabetes should have an HbA1c of 7.4% or a safe lower value.</p><p></p><p>The longer answer is that the World Health Organisation (WHO) define impaired glucose tolerance as a fasting plasma blood glucose less than or equal to 7.0 mmol/L and a 2 hour GTT plasma BG reading between 7.8 and 11.1 mmol/L. Divide these figures by 1.12 to arrive at a whole blood glucose reading (which is what your meter will probably be calibrated to) to get 6.3 mmol/L and between 6.9 and 9.9 mmol/L.</p><p></p><p>Impaired fasting tolerance is defined by WHO as a fasting plasma blood glucose of between 6.1 and 6.9 mmol/L and a 2 hour GTT plasma BG reading < 7.8 mmol/L (or whole blood glucose between 5.4 and 6.1 mmol/L and < 6.9 mmol/L).</p><p></p><p>So, if you maintain BG levels below the ranges above then you have succeeded. The odd slip now and again should not overly affect your HbA1c.</p><p></p><p>Regards, Tubs.</p></blockquote><p></p>
[QUOTE="tubolard, post: 34472, member: 9741"] I think the short answer to that is that there is no clearly agreed definition of what a non-diabetic HbA1c is. Bernstein suggests 4.2% to 4.6%, another suggestion has been 3.5% to 5.5%, I have seen 4.6% to 6.4%, and another study suggests a mean of 5.3%. The NHS target for diabetics is that 50% of people with diabetes should have an HbA1c of 7.4% or a safe lower value. The longer answer is that the World Health Organisation (WHO) define impaired glucose tolerance as a fasting plasma blood glucose less than or equal to 7.0 mmol/L and a 2 hour GTT plasma BG reading between 7.8 and 11.1 mmol/L. Divide these figures by 1.12 to arrive at a whole blood glucose reading (which is what your meter will probably be calibrated to) to get 6.3 mmol/L and between 6.9 and 9.9 mmol/L. Impaired fasting tolerance is defined by WHO as a fasting plasma blood glucose of between 6.1 and 6.9 mmol/L and a 2 hour GTT plasma BG reading < 7.8 mmol/L (or whole blood glucose between 5.4 and 6.1 mmol/L and < 6.9 mmol/L). So, if you maintain BG levels below the ranges above then you have succeeded. The odd slip now and again should not overly affect your HbA1c. Regards, Tubs. [/QUOTE]
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