Estimated average glucose (mmol/L)
What it measures, and what changes the number.
Estimated average glucose, or eAG, is a calculated value derived from HbA1c, expressed in millimoles per litre, the glucose unit used in many countries. It gives an approximate average of blood glucose over the past few months rather than a single moment.
It is always reported alongside HbA1c and is often looked at together with fasting glucose or fructosamine. The mg/dL version shows exactly the same information in a different unit.
As a derived figure it needs no fasting. Factors that affect HbA1c, including red blood cell turnover and haemoglobin variants that interfere with some assays, also affect eAG. Labs may print it as eAG (mmol/L).
Often read alongside: HbA1c (IFCC), HbA1c (NGSP), Glucose, Fructosamine, Estimated average glucose (mg/dL)