[blindriver]

It's high, like 6.7-6.9. It doesn't make sense to me because that would suggest average blood glucose of over 150, but it's objectively around 120.

[nradov]

There is some genetic variability in the correlation between blood glucose versus HbA1c. The HbA1c test is essentially an integrator of blood glucose level over time but different people have different average red blood cell lifespans.

[majkinetor]

RBCs life span can vary between humans. That's why hba1c is not always the correct surrogate.