Indeed, I had that in mind, but in my case on eight daily readings it was actually fairly close. My calculation made my HbA1c 47.8 and the actual result was 45. Love that calculator page
I can't do this. It just doesn't work. My last HbA1c was 44, which equals an average mmol/l of 7.3.
.....
This also happened on all my previous review HbA1c tests.
Maybe mine was just a fluke! I try it again in 9-10 weeks when I get my next test!I can't do this. It just doesn't work. My last HbA1c was 44, which equals an average mmol/l of 7.3.
As I spend all day and all night in the 4s and 5s other than post lunch and post evening meals where my levels rarely rise above 7, and that is a brief rise, how on earth can my average be 7.3?
This is according to 2 different meters with 8 to 10 tests a day and also according to my Libre sensors (after adding 1mmol/l to the Libre readings as they tend to read about 0.5mmol/l on me, so I am being hard on myself with this) I estimated my last HbA1c to be around 35 to 38.
This also happened on all my previous review HbA1c tests.
I'll have a look at Mysugr, I currently use the app Glucose Companion for my weight and blood sugars and an Excel spreadsheet for my food diary. I like that Mysugr works out an HbA1c estimate.Ive been retesting some foods to guage impact progression - I have started to use mysugr (free app from app stote) to record my readings / foods etc - lot easier than the spread sheet method I was using before
Once youve inputed enough data, it gives you an estimated hba1c - no idea how accurate the estimate is, only time ( and my next diabetic review blood tests) will tell.
Maybe mine was just a fluke! I try it again in 9-10 weeks when I get my next test!
Maybe a lucky fluke. Without a continuous monitoring system you have no idea what happens overnight, what your levels are between tests, how high the actual peak is, how long you stay higher than your base after eating, whether your choice of food in a particular meal peaks later or even twice, and so on. (We can and do peak twice with certain meals). Your 8 tests consist of only 3 post meals when you would expect to be higher, and 5 pre-meal/fasting/bedtime tests when you expect to be lower. That isn't averaging like with like. To get an average close to your HbA1c you would have to test half hourly at least!
Some members here do report they can estimate HbA1c from meter tests, but how they manage this I have no idea.
then I calculated an overall average of the 12 weeks using the weekly averages (In my case I had three weeks missing, but converted my old HbA1c using the calculator on the page I've link below for those weeks).
My GP is obviously going for the middle ground then testing approx. every 10 weeks!Research is starting to say that the last few weeks BG has more affect on HbA1c then the BG from 12 weeks ago. So taking an average over 12 weeks is likely to overestimate HbA1c if your BG is going down. Therefore doctors are starting to do HbA1c after 8 weeks.
As some peoples blood cells last longer then others, a HbA1c can only be converted to a BG reading for the "average person". For Type2, HbA1c is most useful as a "fire alarm" when it increases or does not decrease when expected.
Me? I have learnt to take very little notice of my HbA1c and wouldn't care if I never had another one. My red blood cells just do not comply with the accepted norm. I just rely on my self testing and part time Libres, watching for upwards and downward trends.
Not sure I understand what you mean. You say "taking an average over 12 weeks or 8 weeks" as though there is some sort of calculation involved. They could measure your HbA1c every 2 weeks it wouldn't make any difference. The point is the reading reflects what has occurred over the last 8-12 weeks so if you have had a change (or not) of diet or medication, then to find the full effect you need to wait until all the blood cells have renewed under the new regime.Research is starting to say that the last few weeks BG has more affect on HbA1c then the BG from 12 weeks ago. So taking an average over 12 weeks is likely to overestimate HbA1c if your BG is going down. Therefore doctors are starting to do HbA1c after 8 weeks.
As some peoples blood cells last longer then others, a HbA1c can only be converted to a BG reading for the "average person". For Type2, HbA1c is most useful as a "fire alarm" when it increases or does not decrease when expected.
Not sure I understand what you mean. You say "taking an average over 12 weeks or 8 weeks" as though there is some sort of calculation involved. They could measure your HbA1c every 2 weeks it wouldn't make any difference. The point is the reading reflects what has occurred over the last 8-12 weeks so if you have had a change (or not) of diet or medication, then to find the full effect you need to wait until all the blood cells have renewed under the new regime.
Not sure I understand what you mean. You say "taking an average over 12 weeks or 8 weeks" as though there is some sort of calculation involved.
Yes, I tried it, last week was my first HbA1c since diagnosis. This is how I described what I did:Higher up in the thread people where talking about predicting their HbA1c based on their own BG readings.
Sorry, I misunderstood. You're correct, if people are averaging their own readings then they need to do it over 8/12 weeks if their readings are changing. If as you say the HbA1c is biased towards later weeks then it is not a simple relationship between average BG and HbA1c and not surprising if it is not accurate. My HbA1c is 37 which the calculator says equates to an average BG of 6.2 which seems reasonable as my BG is consistently about 6 before meals and about 7 after 2 hours.Higher up in the thread people where talking about predicting their HbA1c based on their own BG readings.
Hi Rachox, that makes perfect sense. Thank youI didn't know if it would work as my daily readings are just eight snapshots and I didn't know what my sugars were doing inbetween, however my calculation was fairly close.
The maths: I took eight readings a day, then each day I worked out the average (add all eight together and divide by eight). I then worked out weekly averages using the daily ones, then I calculated an overall average of the 12 weeks using the weekly averages (In my case I had three weeks missing, but converted my old HbA1c using the calculator on the page I've link below for those weeks). I then used the second part of the calculator to convert my grand average into an approximate HbA1c reading! Ta daa! Hope that makes sense, told you I'd become a number cruncher!
http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html
By the way Rachox have you looked at Libre? It will do all this for you. Bit pricy though. I am still thinking about it.sure others on the forum use it.Hi Rachox, that makes perfect sense. Thank you
I have looked at it but my bank balance says no, it's so expensive!By the way Rachox have you looked at Libre? It will do all this for you. Bit pricy though. I am still thinking about it.sure others on the forum use it.
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