Test your medicine knowledge with the MKSAP challenge, in partnership with the American College of Physicians.
A 55-year-old man is evaluated following a screening for type 2 diabetes mellitus. He is asymptomatic. He has a history of hypertension and hyperlipidemia. There is no history of anemia, liver disease, or kidney disease. Medications are lisinopril and rosuvastatin.
On physical examination, blood pressure is 123/76 mm Hg and pulse rate is 72/min. His body-mass index (BMI) is 28. The remainder of the examination is unremarkable.
Laboratory studies show hematocrit 45.6%, creatinine 1.0 mg/dL (88.4 µmol/L), fasting glucose 128 mg/dL (7.1 mmol/L), and HbA1c 5.6%.
Which of the following is the most appropriate diagnostic test to perform next?
A. Fasting plasma glucose
B. HbA1c
C. Oral glucose tolerance test
D. Random blood glucose
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