Also called eag or average glucose; another way to report the results of an a1c test. The a1c test measures average glucose levels over the past 2 to 3 months. In the past, results were reported as a percentage. Results reported as an eag are given as mg/dl, the same units used for self-monitoring of blood glucose with a blood glucose meter. For example, results of an a1c test can be reported as an eag of 126 mg/dl, which is equal to 6 percent.