Aim To assess association of blood glucose levels and haemoglobin A1c.

Materials and Methods Population-based screening for glucose metabolism impairments using standard 2-h OGTT among 661 adults in Moscow Country was conducted in 2009. HbA1c was determined in 39 subjects with glucose metabolism impairments. Correlation (r) and unstandardised regression coefficient (B) was calculated.

Results There was no association (r=0.306, p=0.083) between fasting hyperglycemia and HbA1c in people without T2DM, also there was no association (r=0.134, p=0.456) between 2-h hyperglycemia and HbA1c in people without T2DM, but there was positive association between IFG+IGT and HbA1c (B=3.180, p=0.024). Also newly diagnosed T2DM increase HbA1c (B=1.735, p=0.031).

Conclusion Only combination IFG+IGT and T2DM increase HbA1c.