Diagnosis of Diabetes
Random Plasma Glucose Test
A random blood glucose level of 200 mg/dL or more, plus presence of the following symptoms, can mean that you have diabetes:
- Increased urination
- Increased thirst
- Unexplained weight loss
Other symptoms include fatigue, blurred vision, increased hunger, and sores that do not heal. Your doctor will check your blood glucose level on another day using the FPG or the OGTT to confirm the diagnosis of diabetes.
Newer guidelines are beginning to allow hemoglobin A1c as a screening tool for prediabetes (the test is normally used to measure blood glucose control in diabetes patients over several months). A HbA1c of 5.7 is consistent with prediabetes and marks a time when it can be reversed by lifestyle changes.