问题
单项选择题
A 28-year-old woman is scheduled for a glucose tolerance test (GTT). She asks the nurse what result indicates diabetes mellitus. The nurse should respond that the minimum parameter for indication of diabetes mellitus is a 2-hour blood glucose level greater than（）
A. 120 mg/dL
B. 150 mg/dL
C. 200 mg/dL
D. 250 mg/dL
答案
参考答案：C
解析：
A GTT indicates a diagnosis of diabetes mellitus when the 2-hour blood glucose level is greater than 200 mg/dL. Confirmation occurs when at least one subsequent result is greater than 200 mg/dL.