Understanding Common Tests
Blood tests are used to diagnose diabetes and prediabetes because, early in the disease, type 2 diabetes may have no symptoms. All diabetes blood tests involve drawing blood. Measuring glucose levels via finger-stick devices is not accurate enough for initial diagnoses. Tests can include:
- An A1C test, also called the hemoglobin A1C, HbA1C or glycohemoglobin test
- A fasting plasma glucose (FPG) test
- An oral glucose tolerance test (OGTT)
Another blood test, the random plasma glucose (RPG) test, is sometimes used to diagnose diabetes during a regular health checkup.
Symptoms of diabetes may include:
- Increased urination
- Increased thirst
- Unexplained weight loss
Other symptoms can include fatigue, blurred vision, increased hunger and sores that don’t heal.
–Source: National Institute of Diabetes and Digestive and Kidney Diseases