Tests for type 1 and type 2 diabetes and prediabetes include:
1. Glycated hemoglobin (A1C) test.
- An A1C level of 6.5 percent or higher on two separate tests indicates that you have diabetes.
- An A1C between 5.7 and 6.4 percent indicates prediabetes. Below 5.7 is considered normal.
2. Random blood sugar test.
A blood sample will be taken at a random time.
- Regardless of when you last ate, a random blood sugar level of 200 milligrams per deciliter (mg/dL) — 11.1 millimoles per liter (mmol/L) — or higher suggests diabetes.
3. Fasting blood sugar test.
A blood sample will be taken after an overnight fast.
- A fasting blood sugar level less than 100 mg/dL (5.6 mmol/L) is normal.
- A fasting blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes.
- 126 mg/dL (7 mmol/L) or higher on two separate tests, you have diabetes.
4. Oral glucose tolerance test.
For this test, you fast overnight, and the fasting blood sugar level is measured. Then you drink a sugary liquid, and blood sugar levels are tested periodically for the next two hours.
- A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal.
- A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes.
- A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes, you have diabetes.
For more info you can go to a specialist.
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