Guestimating Hba1c

I get my Hba1c test once a year. It used to be more when I had access to a DAFNE team.
I now estimate my own just by using an online estimating calculator to give me an idea whether I am going to get chowed at by my GP. With one test a year I miss out on 9 months worth of Hba1c's. (3 tests)
I can end up talking to my GP about a result from nearly a year before.

http://www.soc-bdr.org/rds/authors/unit_tables_conversions_and_genetic_dictionaries/e5184/index_en.html

This is what I do to estimate my hba1c.

step 1/
Work out an average BG for your results.( you can add 3 months results up if you like and divide the result by how many results you counted, or look at your 'mean' graph)

paste the above link into your address bar. It brings up the website for'SOCIETY FOR BIOMEDICAL DIABETES RESEARCH'

step 2/ Use their converter to change your average BG in mmol/l to mg/dl.

step 3/ Use the A1c test calculator from the following link. (it does not accept mmol/l readings only mg/dl)

www.accu-chek.com/us/glucose-monitoring/a1c-calculator.html#

It was not far off last time for me when I compared it too my last actual hba1c.

I use the formula:

HbA1c = Average BG + 2.52 / 1.583

its usually within + or - 0.5%

Its strange though, I have never feared a bollocking from my team, they have always shown concern if its really high, but asI am DAFNE trained, they know I am doing my best and that I can identify the areas that need attention...........

Maybe i'll use that formulae instead. Thanks.

I never had any problems with my old Dafne team or anyone who was dafne related.

Hi,

Just done my Hba1c. It was 7.37% doing it using thebatoutofhull's way & about 7.4% doing it novorapidboi26's way. I got the 3 months results (last 90 days) from the "my blood glucose diary" on here. When i get my result on the accu-chek site it does give me a message of "Keep up the good work—you're very close to target!" Myself i'm, really annoyed now because my last one in December was 6.8% & i had my DSN phoning me to congratulate me.

I haven't had enough personal experience with it to confidently trust the formula, my average blood sugars just aren't accurate enough........so don't worry too much.....

Also for some reason my DSN said at my last appointment that my average will probably go up???

Hi, both these estimating systems are only a guide. They just give me an idea where I am. Hypo'thetically you could have 3 months of test results ranging from 5 to 7 and get the same average as someone with test results which are much more wider ranging.

You could in theory have more glucose in your blood, but also have a lot of hypos and get the same average BG as someone with better control.