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Constant high (13.7+) BS reading
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<blockquote data-quote="RussG" data-source="post: 216369" data-attributes="member: 30691"><p>Hi cinnamon,</p><p></p><p>You can convert between HbA1c and average BG reading here:</p><p><a href="http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html" target="_blank">http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html</a> although you can also do it by one of two calculations: </p><p></p><p>to estimate HbA1c:</p><p></p><p>(avg reading + 2.52) / 1.583 or</p><p></p><p>((avg reading x 18) + 77.3) / 35</p><p></p><p>to do it the other way: </p><p></p><p>(HbA1c x 1.583)-2.52 or </p><p></p><p>((HbA1c x 35) -77.3) / 18</p><p></p><p>These give different results but are near enough for estimation purposes. They give you an average BG reading during the time covered by the HbA1c, although a) that would clearly mask highs and lows and b) it would also be weighted towards the most recent month. The estimated HbA1c is only going to be as good as your meter readings. If you've got loads, and at different times, it should be fairly decent. If you haven't got many, or they're all just before meals (which would be lowest readings usually) then the estimate would be artificially lowered. I use the 2.52 / 1.583 one.</p><p></p><p>PS there's a thread about this here. <a href="http://www.diabetes.co.uk/diabetes-forum/viewtopic.php?f=15&t=23522" target="_blank">http://www.diabetes.co.uk/diabetes-forum/viewtopic.php?f=15&t=23522</a></p><p></p><p>I also use a ratio 70: 20: 10 to weight my last three months when calculating HbA1c (i.e. here is my excel fomula =((((LATESTMONTHAVG*7)+(MONTHBEFOREAVG*2)+THIRDMONTHAVG)/10)+2.52)/1.583</p></blockquote><p></p>
[QUOTE="RussG, post: 216369, member: 30691"] Hi cinnamon, You can convert between HbA1c and average BG reading here: [url]http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html[/url] although you can also do it by one of two calculations: to estimate HbA1c: (avg reading + 2.52) / 1.583 or ((avg reading x 18) + 77.3) / 35 to do it the other way: (HbA1c x 1.583)-2.52 or ((HbA1c x 35) -77.3) / 18 These give different results but are near enough for estimation purposes. They give you an average BG reading during the time covered by the HbA1c, although a) that would clearly mask highs and lows and b) it would also be weighted towards the most recent month. The estimated HbA1c is only going to be as good as your meter readings. If you've got loads, and at different times, it should be fairly decent. If you haven't got many, or they're all just before meals (which would be lowest readings usually) then the estimate would be artificially lowered. I use the 2.52 / 1.583 one. PS there's a thread about this here. [url]http://www.diabetes.co.uk/diabetes-forum/viewtopic.php?f=15&t=23522[/url] I also use a ratio 70: 20: 10 to weight my last three months when calculating HbA1c (i.e. here is my excel fomula =((((LATESTMONTHAVG*7)+(MONTHBEFOREAVG*2)+THIRDMONTHAVG)/10)+2.52)/1.583 [/QUOTE]
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