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How accurate are HbA1C or Dexcom readings?

E

ElenaP

Well-Known Member
Messages
534
Type of diabetes
Type 1
Treatment type
Pump
I have been using a Dexcom G6 for approximately five months with a t:slim pump. Before I switched to t:slim/Dexcom combination, my HbA1C was 59 (7.5?). According to Dexcom Clarity, my 90-day blood glucose is now estimated to be 6.5%. However, the blood test still shows HbA1C at 59, which I found somewhat disappointing.
Obviously I will need to tighten my control, but I am just wondering if these figures make sense to others?
 
ElenaP said:
However, the blood test still shows HbA1C at 59, which I found somewhat disappointing.
Obviously I will need to tighten my control, but I am just wondering if these figures make sense to others?
Click to expand...

Hmm, maybe I'm asking a stupid question, but is there any chance there has been a mistake and that 59 is your old reading?

As regards the dexcom estimate, I find mine fairly accurate. Have you tried testing your dexcom against a glucometer to see of it is consistently under reading?
 
EllieM said:
Hmm, maybe I'm asking a stupid question, but is there any chance there has been a mistake and that 59 is your old reading?

As regards the dexcom estimate, I find mine fairly accurate. Have you tried testing your dexcom against a glucometer to see of it is consistently under reading?
Click to expand...
I calibrate the Dexcom reading every morning, and other times when the pump or Dexcom app asks for it.

Those blood test for HbA1c were from 26th May and 8th November, both taken at the GP surgery.
 
ElenaP said:
Those blood test for HbA1c were from 26th May and 8th November, both taken at the GP surgery.
Click to expand...
Hmm, could there be user error involved here? Someone has copied over the previous result instead of the current one?
 
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