nutritionaldiabeticfor 😲glucose levels chart. Chronic versus acute hyperglycemia in the pathogenesis of vascular complications Hemoglobin A1C (HbA1c) is the main parameter which has been used for over 30 years to monitor long-term glycemic control. 49 HbA1c levels reflect blood glucose levels over a 2- to 3-month period, with plasma glucose levels in the preceding 30 days contributing 50% ....