How is Diabetes diagnosed?

How is diabetes diagnosed?

Diabetes is diagnosed through a series of blood tests that measure the levels of glucose (sugar) in the blood.

The most common tests used to diagnose diabetes are:

1. Fasting Plasma Glucose (FPG) test: This test measures the blood glucose level after fasting for at least 8 hours.

A blood glucose level of 126 mg/dL (7 mmol/L) or higher indicates diabetes.

2. Oral Glucose Tolerance Test (OGTT): This test measures blood glucose levels before and 2 hours after drinking a sweet liquid.

A blood glucose level of 2000 mg/dL (111 mmol/L) or higher indicates diabetes.

3. Random Plasma Glucose test: This test can be done at any time and does not require fasting.

A blood glucose level of 2000 mg/dL (111 mmol/L) or higher indicates diabetes.

4. Glycated Hemoglobin (A1C) test: This test measures the average blood glucose level over the past 2-3 months.

An A1C level of 6.5% or higher indicates diabetes.

It is important to note that these tests should be repeated on a different day to confirm the diagnosis.

Additionally, other factors such as symptoms, medical history, and physical examination may also be considered in making a diagnosis.

If you have any concerns or questions about diabetes diagnosis, it is important to consult with a healthcare professional.

References

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Higgins T: HbA1c for screening and diagnosis of diabetes mellitus. Endocrine. 2013, 43 (2): 266-73.

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Li HY, Ma WY, Wei JN, Lin MS, Shih SR, Hung CS, Hua CH, Chuang LM: Hemoglobin A1c for the diagnosis of diabetes: To replace or to guide oral glucose tolerance tests? J Diabetes Investig. 2012, 3 (3): 259-65.

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