HbA1c level in blood explains -
Measurement of glycated hemoglobin (HbA1c) is the standard method for assessing long-term glycemic control. When plasma glucose is consistently elevated, there is an increase in nonenzymatic glycation of hemoglobin; this alteration reflects the glycemic history over the previous 2-3 months, because erythrocytes have an average life span of 120 days. A rise of 1 % in HbA1c corresponds to an approx average increase of 2 mmol/L (36 mg/dL) in blood glucose. Reference : page 2410 Harrison's Principles of Internal Medicine 19th edition and page 808 Davidson's Principles and practice of Medicine 22nd edition
Acute rise of sugar
Long terms status of blood sugar
Hepatorenal syndrome
Chronic pancreatitis
Endocrinology