There are various labs which provide the HbA1C testing. I have done this test from various labs and found they are following different methods to find HbA1C readings
To my knowledge, there are 3 methods.
1. Cation - Exchange resin method,
2. Nycocard HbA1c boronate affinity assay.
In my case, test done by above 3 methods differ. Although tests were done at almost 2 months interval, i don't think my BSL has changed much. The values by these tests are almost a 1% off. Nycocard HbA1c boronate affinity assay test i think is the most unreliable method.
Kindly share your experience with me.