American Diabetes Association
One of four tests can be used to establish a firm diagnosis of diabetes:
Fasting plasma glucose (FPG) >6.9 mmol/L (>125 mg/dL) (most commonly used)
Random plasma glucose ≥11.1 mmol/L (≥200 mg/dL) with diabetes symptoms such as polyuria, polydipsia, fatigue, or weight loss
2-hour post-load glucose ≥11.1 mmol/L (≥200 mg/dL) on a 75 g oral glucose tolerance test
HbA1c ≥48 mmol/mol (≥6.5%).
All of these require confirmation with a second test, which may be the same test or a different test. One option is to test both HbA1c and FPG on a single blood sample.
Use of this content is subject to our disclaimer