
- With Mayo Clinic diabetes educators
Nancy Klobassa Davidson, R.N., and Peggy Moreland, R.N.
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Nancy Klobassa Davidson, R.N., and Peggy Moreland, R.N.
Nancy Klobassa Davidson and Peggy Moreland
Nancy Klobassa Davidson, R.N., B.S.N, C.D.E
Nancy Klobassa Davidson is a registered nurse who has worked in diabetes education for 17 years. She is a certified diabetes educator (C.D.E.) and is currently in graduate school working on a Master of Science in nursing (M.S.N.) and health care education.Nancy works with adults who have type 1, type 2 and other forms of diabetes. Nancy is coordinator of the Diabetes Unit's intensive insulin therapy program within the Division of Endocrinology, Diabetes, Metabolism, & Nutrition at Mayo Clinic in Rochester, Minn. Nancy has worked extensively with insulin pump therapy and continuous interstitial glucose sensing.
Peggy Moreland, R.N., M.S.N.
Peggy Moreland is a certified diabetes educator (C.D.E.) in the Division of Endocrinology, Diabetes, Metabolism, & Nutrition at Mayo Clinic in Rochester, Minn.Peggy graduated with a Master of Science in Nursing and Health Care Education from the University of Phoenix and is a member of the American Association of Diabetes Educators and the American Diabetes Association. A certified diabetes educator (C.D.E.), Peggy enjoys working with patients to set and achieve diabetes self-management goals.
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Oct. 27, 2009
A1C test helps diagnose diabetes
By Nancy Klobassa Davidson, R.N., and Peggy Moreland, R.N.
Our office recently received a call asking about a "new" blood test to diagnose diabetes. You may have heard on the news earlier this year that at the American Diabetes Association's annual meeting an international committee of experts announced their consensus that the A1C blood test is an accurate way to diagnose diabetes.
The A1C test, also known as glycated hemoglobin or HbA1C, is a blood test that provides a picture of average blood sugar control for the past two to three months. When you have uncontrolled diabetes, you have too much sugar in your blood stream. The extra blood glucose enters your red blood cells and sticks to the molecules of the hemoglobin.
The A1C measures the percentage of glycosylated hemoglobin in your blood and this gives your doctor an overview of your average blood glucose control over the past 2-3 months. So, the A1C test is not new, it is just that it's now being recommended as a tool to diagnose diabetes.
The A1C helps:
- Confirm self-testing blood glucose results
- To evaluate whether or not your diabetes management plan is working
- You see how healthy choices make a difference in blood sugar control
The A1C does not:
- Replace daily self-testing of blood glucose
- Measure your day-to-day control. You cannot adjust your insulin doses based on A1C tests
Daily self-testing of blood glucose and your log results are important to staying in effective control. The A1C test is used along with your daily blood glucose checks for the best possible control.
50 comments posted
April 15, 2013 12:48 p.m.
Anna: We are so sorry. It is difficult watching a loved one neglect him/herself especially when you know the long term consequences of uncontrolled diabetes. Unfortunately there isn't much you can do other than encourage him to get help managing his diabetes.
- Nancy and Peggy
April 11, 2013 3:31 p.m.
My son, a 41 year-old male, just went to the endocrinologist about 2 weeks ago. He is a type 2 diabetic and was told that his A1c level is 15! He had not been to the doctor for more than a year before that. He is not currently on insulin, but takes an oral medication. I am terrified about what this means. I have done some research and an a1c level of 15 indicates that his diabetes has not been controlled for a long period of time. My son is pretty secretive and doesn't want me to go to the doctor's office with him. I'm giving him copies of all of the articles I found concerning someone with his a1c level. What else can I do? P.S. I also have a 30 year-old son with diabetes who is insulin dependent. However, he has an a1c level of 6.5. I manage his diabetes care because he is autistic and cannot do it. Any ideas about my 41 year-old son?
- Anna
February 9, 2013 7:38 a.m.
can vitamins c and E cause higher a1c levels taking vit c250mg (417%dv) and vit e 200u(667%DV) or what causes very high a1c when bs around 180
- doris
January 19, 2013 4:26 a.m.
I would like information on hemoglobin variants test vs hemoglobin A. My A1c was 7. My concern is this a false result,I am a black person.
- Marilyn
October 31, 2012 9:28 a.m.
A1c of 10.6 indicates that diabetes medication (probably insulin) needs to be started, along with self-monitoring the blood glucose, exercise program and diet instruction. The American Diabetes Association states the target range for the A1c be 7 or less.
- Nancy and Peggy
October 24, 2012 12:45 a.m.
i went to the dr today and my ac1 was 10.6 what appens next
- christina
February 11, 2012 1:18 p.m.
I am a 58 year-old woman and there is a history of diabetes in my family. last A1C was 6.1. I was not technically overweight but have lost 7 lbs since then. Previously, with my weight a little lower, my A1C has been 5.7-5.9. I have a daily vigorous yoga practice, but do better when I also have time to walk or swim. I am trying to see whether I can make a difference in this over a 3-4 month period, but I wonder, will I be able to prevent full-blown diabetes? I have been "pre-diabetic" for about 5 years. I am hoping to forestall or prevent the need for constant taking and balancing of medication. I'm a little afraid. I had one parent with "mild" diabetes that was undetected for a long time and very bad symptoms. Another has never been overweight and tightly managed medication and has no complications. But i am not ready to be old and tied to drugs and doctors.
- Beth
February 10, 2012 7:17 p.m.
I just turn 63 years and diabetes does not run in my family. I recently had blood work done and the A1C came back 6.8 I am very concern. Does this call for a change in diet.
- Estelle
November 28, 2011 5:15 p.m.
My blood test showed a Haemoglobin A1C of 5.9%. The serum glucose was 83 mg/dL. Does this mean I am prediabetic? Marie
- Marie
August 27, 2011 1:21 p.m.
I have just been diagnosed with Type 2 diabetes. I was given a glucose reader to test myself. How do I react to a high reading? Is there something I should do? It was not explained to me.
- Jonnye
July 25, 2011 9:51 a.m.
my dr. said my os should be under 180 whatdoes that mean
- helen
July 18, 2011 3:56 p.m.
Joanie, Prednisone can cause the blood glucoses to rise in some non diabetic people. Hopefully, the Prednisone therapy is short term and after the treatment the blood glucose will return to a normal range.
- Nancy and Peggy
July 12, 2011 6:40 p.m.
I had a nerve in my arm pinched during gynecological surgery. Afterward I was given this AIC test and a thyroid screening. My results were a 5.9 for the AIC. I never had more than an 84 on the fasting glucose test. I was prescribed prednisone a month prior to the test and take multivitamins containing both C and E. Would prednisone and the supplements cause a higher than normal reading? The lab used had a cutoff of 5.6. I'm starting to wonder if this is more junk science to flag people for "treatment" they don't really need. Quite frankly I don't want or need the AMA riding herd over my dietary choices if I'm not actually diabetic. This disease does not run in my family.
- Joanie
July 7, 2011 1:10 a.m.
For over 2 yrs my A1C has been excellent. The reason for the testing is a neurologist said I had diabetic neuropathy in my feet and lower legs. Even 4 months ago my A1C was great. Now 1 week ago glucose tolerance showed diabetes. I am confused. How can I have neuropathy from something I supposedly do not have and the tests backing it up. Now just after great results a glucose tolerance shows diabetes. How does this happen?
- Kay
June 24, 2011 12:29 p.m.
My endocrinologist wants me to have an A1C test again because he suspects I suffer from low blood sugar. What result should I expect from the AIC test if it comes back saying yes, I hve low blood sugar. AIC 3, 4, etc
- Rusty
April 28, 2011 8:42 p.m.
I do not have diabetes. When my doctor went over my blood work today she said my serum glucose was 100 and my A1c was 6.0. My last glusose was 91 and I did not have a A1c test.How bad is this? She is making me feel I now have diabetes. I have gained 12 pounds in one year. I feel if I can lose the weight that I might be in the normal range.
- Sue
April 12, 2011 9:33 p.m.
How about if my A1C is 95mg/dl do I have diabetes and what stage thank you
- Lesieli
March 21, 2011 2:42 p.m.
Charles: Here is a conversion chart from diabeteschart.org that also has a conversion formula you can use if you want to. http://www.diabeteschart.org/bloodsugarchart.
html - Nancy and Peggy
March 14, 2011 5:28 a.m.
Can you provide a conversion chart from home blood testing results to A1c results? I keep track daily of my blood sugar but can not find a conversion chart that gets me close to what my expected A1c results will be. Or can you give us a conversion formula that we can plug in our average home testing for 120 days to an A1c result?
- Charles
March 7, 2011 8:57 a.m.
Kathy: If your A1c is 6.9% and your blood sugars as stated, you have diabetes. We recommend that you see your provider for treatment.
- Nancy and Peggy
March 4, 2011 1:21 p.m.
hi i'm concerned about my blood sugar levels. Last year's blood panel indicated possible diabetes. I don't remember what my a1c was, but was told that I was prediabetic. I occasionally tested, took alot of things out of my pantry, switched to good fats, got rid of all saturated and trans fats. Well I've recently tested for about 2 weeks, high levels even after having a chicken sandwich on low carb bread and a cup of tomato soup. fasting level was 134 Wed and A1C was 6.9. The nurse told me i was prediabetic, she wouldn't even look at my diary with what i ate and blood sugar readings. I think I need to get a second opinion. One night it was 339 after dinner. I don't have health insurance, so where I go is limited. i went to the low cost clinic. i hate going there, the people are rude, don't listen to you, nad rush you out before you get your needs addressed!!!
- Kathy
January 22, 2011 1:46 p.m.
Extensive blood work and urinalysis 1/17/2011, fasting showed: A1c at 5.7, blood glucose 87, Insulin level 27... 71 yrs female. slight hypertension, lipid panel all in range. Normal weight, normal BMI as per charts. Concerned about high insulin level. What can cause the high insulin level? thanks for your comments.
- Maria
September 13, 2010 5:15 p.m.
I recently was diagnosed with peripheral neuropathy had 1 surgery in 08 for tarsal tunnel on 1 foot now also my sugar level is elevated and diabetes runs in the family (5) cannot work due to the neuropathy.trying to get free info on the diabetes factor.....its a one day at at time for me i have a good neurologist and pain meds of course....i miss working but cannot...just hang in there....i have family friends and my faith in god.
- sarah
September 9, 2010 10:48 a.m.
Cindy, you are correct, the A1C test is a weighed mean, meaning the last month of bg's does impact the reading more. There is a fructosamine test that reflects a couple weeks of glucose control.
- Nancy and Peggy
September 3, 2010 10:28 a.m.
My understanding is that the A1C test gives an indication of average blood glucose levels over past 3 months. But that it is weighted to the most recent weeks. So doesn't it make sense to test A1C more often than every 3 months. If I test each month, won't I have better view of how my diabetes management is going?
- Cindy
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