High A1C doesn't match my meter readings

hi guys. i was diagnosed in June with an A1C of 16.2%. by September it was 8.0%. in December i was down to an A1C of 5.9%!

HOWEVER, my meter averages had me hoping/expecting to come in with an A1C of 5.5%

anway, i got to join Jenny’s 5% club and i am very, very happy about that. i continue to eat lower carb than ever before. weight is steady and i am thoroughly enjoying my exercise (not sure why i ever stopped).

– Joel.

Congratulations!

I just recently had my A1c tested for the second time since diagnosis. At my diagnosis I was 16.9% (which was 17 December, 2007) and I just took it on the 11 April 2008 and was so surprised!

5.8%!!! isn’t that great? all my non diabetic friends just blankly stare at me. I need someone to celebrate with!

Wow! That is amazing. Congratulations!

That is extremely great, and everyone here will celebrate with you for sure!

That is totally admirable! Congratulations!

Many meters are very inaccurate, you may want to try the accu-chek Aviva, Dr Bernstein has tested it versus a lab reference and believes it is very accurate. I believe he reduces the readings by 5%. Also, you may have some gastroparesis so any carbs you eat may not impact your readings until about 5 hours later. You may want to take a measurement at 2 hours and 5 hours after meals. Hope that helps!

A1C shown the glucose level in 3 month ago.
You should not check A1C every month. 4 times in one years is good enough.
A1C goal is lower 6.5 %

Hey everyone. I was wondering, I read on the net about wine for dinner helping with diabetes and something esle that surprised me, to eat a sweet potatoe opposed to a regular potatoe…its this true, because I gave up potatoes all together…My diet consist mostly of vegetables and protein, mainly proteins. I have to keep it this way, or my numbers rise easily. I use two 5/500 Metphormins in the morning accomoddated by Actos and Hyzarr for blood pressure. Of course the following vitamins, Chromium picolinate, and Flax, Fish,Borage, Oil. So…if I do a glass of wine or two, what kind is mbest in the red wine…? sweet or dry? any ideas…and is the sweet potatoe ok with a bbq? gosh this is all hard but I am really working at it. I will check my sugar two hours later and if its high…then I am going to have to go on insulin or some kind of stronger pill. How does a doctor know which you are? insulin dependent…or insulin resistant?.

Sherri

I have to be the weird one, as usual. I tend to have lower A1Cs than my daily cough BG readings would indicate.

This can happen if you give blood either on purpose or if you’ve bled a lot for some reason or if your red cells don’t live as long as usual.

Oops. I was replying to the comment that A1c was lower than expected.

Your A1C score is about 70% based on your fasting/ between meals values and only 30% from meals. Maybe your fasting is higher than you realize? Or perhaps it is increasing as you sleep?

No, my fasting was under 100 at all times, I even got up in the night to test and it was the same. I test up to 12 times a day so I know that my BG average numbers are much lower than my A1C. My endo can’t explain it, but I have read that some people are up to a point higher and some a point lower than the average numbers.

Your typical A1c test has lots of opportunity for inaccurate results:

  • depends on the technique of the lab tech
  • depends on quality of the analyzer
  • depends on quality of the blood sample taken
  • depends on the method used to determine A1c

Therefore, it’s not uncommon for a result to be +/- half a point (ie a 6.5 can easily be reported as 7.0 or 6.0. If you want truly accurate results you have to look into all of these details above or live with knowing that your A1c is only an approximation… much like the results provided by your glucose meter.

I think it also depends on the age of your red blood cells and if you are a high glycator.

yep. and, and, and… there are even medications that interfere and cause falsely low A1c results for various reasons.

We have had the opposite scenario, whereby numbers are consistently high postprandial (She is an 11 year old Type 1), high numbers, few lows, yet A1c is much, much lower than we expect. I keep the average meter number on my log sheets now. Her A1c is much lower than the meter averages reflect. I am thinking it’s (1) the meter brand, (2) something in her blood that gives a false reading, (3) lows we just did not catch or (4) lab mix-up or lab problems. Previous A1c was 6.5 (which was okay, considering puberty, etc). But I want all A1cs under 6.2 max. This last one came in at 5.8 (we had those weeks of highs, but now she has been dropping). I wonder how accurate the A1c test is? I know it is skewed toward the last five week’s readings (does not give equal weight to the 120 days it measures). I have asked endo for Glycomark test but told I don’t need that, A1c sufficient. I do not have complete faith in the A1c test.

You might want to look into this test that was just reviewed online by Bernard Farrell on his diabetes technology blog.

http://www.bernardfarrell.com/blog/2008/05/testing-your-a1c-from-ho…

My company developed this program a few years ago for some of the exact same reasons described in this thread - most A1c tests are not sensitive or accurate enough for self-care purposes and none of them include analysis of the blood to determine the presence of variant hemoglobins (over 850 causes) which do in fact skew A1c results. It’s a big deal but not very well appreciated until recently. You don’t even need your physician’s ok but discussing the results is advised.

I just had another A1C test done and it was 5.3 which exactly matched my average BG. Go figure… Needless to say, I am very pleased. It’s the lowest I’ve ever had!!