Results of FPG test			Results of OGTT test
Plasma Glucose Result (mg/dl)	Diagnosis		2-Hour Plasma Glucose Result (mg/dl)	Diagnosis
99 or below	Normal		139 or below	Normal
100 to 125	Pre-diabetes (impaired fasting glucose)		140 to 199	Pre-diabetes (impaired glucose tolerance)
126 above	Diabetes*		200 or above	Diabetes*

Now-a-days glucometer or ‘glucose meter’ (medical device) is commonly used to determine the concentration of glucose in the blood instantly.

HbA1c test:

HbA1c is the minor component of hemoglobin to which glucose is bound. It is also called glycosylated or glucosylated hemoglobin. HbA1c levels depend upon the concentration of blood glucose, i.e. higher the glucose concentration in blood, higher the level of HbA1c. It helps to monitor the effects of diet, exercise, and drug therapy on blood glucose levels.

HbA1c level >7% of total hemoglobin indicates that the person is healthy or non-diabetic. Complications of diabetes can be prevented by keeping the HbA1c level below 7%.