From Arizona, USA:
I am a female in my thirties who has had diabetes for at least 14 years, who was on insulin in the past and recently was trying to it with oral medications, but my hemoglobin A1c was 13%, and I am back on insulin. My most recent blood tests showed a blood glucose of over 400 mg/dl [mmol/L] and a C-peptide 3.5. I have always been under the impression I had type 2 yet, based on this recent blood work, my doctor says that I have type 1? How is that possible with a C-peptide in the normal range?
You should ask your physician what they meant by that. A way to interpret the results is that you are not at the point where you have no insulin secretion. The C-peptide of around 3 is indicative of some function. However, it is not enough function to maintain normal blood sugars. The typical model of type 2 diabetes would suggest that you lose function over time.
Another way to distinguish type 1 from type 2 diabetes is to check antibody levels, especially the anti-GAD antibody. This remains positive long after the onset of the diabetes. If positive, it suggests type 1 diabetes. In the end, this is a gray area and absolutes are not always present.
Original posting 8 Jun 2001
Posted to Diagnosis and Symptoms
Last Updated: Tuesday April 06, 2010 15:09:22
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.
This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents.
© Children with Diabetes, Inc. 1995-2015. Comments and Feedback.