Early diagnosis is important

It is important to diagnose diabetes in the early stage because lifestyle modification, diet control and exercise can postpone the conversion of prediabetes.(i.e. Impaired Glucose Tolerance: Fasting Plasma Glucose: 100 -125 mg/dL) to diabetes (Fasting Plasma Glucose ≥ 126 mg/dL)

Measuring glucose concentrations in the blood or plasma is currently the only way to confirm a diagnosis of diabetes. Therefore when doctor suspects diabetes he will advise measurement of glucose level.