Which of the following tests is used for the initial screening of a patient for diabetes type 2? A) Fasting blood glucose B) Blood glucose tolerance test C) Glycosylated hemoglobin A₁c D) All of the above

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For initial screening of a patient for diabetes type 2, a fasting blood sample is usually taken in the morning, after a fast of 10 to 14 hours. The patient's fasting blood glucose (FBG) level should be less than 100 mg/dL. If it is higher than 110 mg/dL, the provider may request a blood glucose tolerance test (GTT). Hemoglobin A₁c is also described as glycosylated hemoglobin (sugar-coated hemoglobin), which is the result of glucose binding irreversibly to the hemoglobin molecules in the RBCs. It is also simply referred to as "the A₁c."

Which of the Following Tests Is Used for the Initial