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*To*: <email @ redacted>*Subject*: RE: [IP] correlation between HbA1C and average BG*From*: "alan reed" <email @ redacted>*Date*: Wed, 4 Aug 1999 10:46:49 +1000*Importance*: Normal*Reply-To*: email @ redacted

It should also be noted that any average of BS's taken using any meter only represent those specific times that tests are carried out. The HbA1c represents an average over a continuous period of time, usually of the order of three months. Thus the differences currently being talked of are well within acceptable limits. With respect to the units used by us less fortunate who live outside the USA the formula is HbA1c = (6 + BS av) / 2 With the latest meters this quick calculation can prove to be a useful indicator of how things are going. It can also bring you down to earth if you let things slide at times. My current Glucotrend Premium meter can automatically give a 7 Day average at the push of a button. Alan Reed. -----Original Message----- From: email @ redacted [mailto:email @ redacted] On Behalf Of Ted Quick Sent: 03 August 1999 07:37 To: email @ redacted Subject: Re: [IP] correlation between HbA1C and average BG email @ redacted wrote: > > Avner, the formula I've seen is A1C = (BG + 86)/33. For your numbers that > puts you at about an AiC of 5.9, not 4.9. However, the formula is more > accurate at higher BGs, because the relation between A1C and BG is > nonlinear (higher BGs also have a much bigger effect on the > glycosolation), and the formula above describes a straight line. Indeed, > according to the formula, with an A1C of 4.1, you'd have a BG of 50!!! > Since A1Cs of 4.0 are in the normal range, and since normals don't live > with an average BG of 50, you can see the inaccuracy. In the lower range > of BGs, this formula will increasingly understimate the actual average BG. > But you must be living like a robot to have achieved such good > numbers. I can't hardly ever get my SD below 60, nor my A1C below 6.4. A > SD of 46 is pretty impressive. I don't know how much more fine tuned you > can get!! What, you want to be normal or something? OK, there's a problem with this idea. A1c tests vary by lab and test machine used, so they can NO be correlated this way. Each situation is different, and unfortunaely there are no real standards for the tests yet, so equating them acoording to what works where you are with his results is only going to be confusing. Ted Quick email @ redacted ---------------------------------------------------------- Insulin Pumpers website http://www.insulin-pumpers.org/ for mail subscription assistance, contact: HELP@insulin-pumpers.org ---------------------------------------------------------- Insulin Pumpers website http://www.insulin-pumpers.org/ for mail subscription assistance, contact: HELP@insulin-pumpers.org

**References**:**Re: [IP] correlation between HbA1C and average BG***From:*Ted Quick <email @ redacted>

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