A blood glucose test screens for diabetes by measuring the level of glucose (sugar) in a person’s blood. A high range could indicate pre-diabetes or diabetes. A glucose test is also used to monitor glucose control for those people who are already known to have diabetes.
Glucose (a kind of sugar) builds up in the blood and binds to the haemoglobin in the red blood cells. A Haemoglobin A1c (HbA1c) test is used to measure the average level of blood glucose over the past two to three months and is commonly used to diagnose and monitor diabetes.