Skill Checkup: A 36-Year-Old Man With Type 2 Diabetes Is Struggling to Lose Weight

Anne L. Peters, MD


June 01, 2022

The ADA criteria state that any of the parameters listed below may be used for the diagnosis of diabetes:

  • An A1c level of ≥ 6.5%

  • FPG of ≥ 126 mg/dL; fasting is defined as no caloric intake for at least 8 hours

  • 2-hour plasma glucose level of ≥ 200 mg/dL during a 75-g oral glucose tolerance test

  • Random plasma glucose of 200 mg/dL or higher in a patient with classic symptoms of hyperglycemia (polyuria, polydipsia, polyphagia, weight loss) or hyperglycemic crisis

The same diagnostic criteria are used for both type 1 and type 2 diabetes. Autoantibody tests can help clarify whether a patient has type 1 or type 2 diabetes.


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