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DM diagnosis...

A)   Hemoglobin A1c is 7.0% and 6.8% on repeat testing.

DM is confirmed because two A1c tests are positive.

B)   Hemoglobin A1c is 7.0% and 6.8% on repeat testing but fasting plasma glucose is 124 mg/dL.

Despite the fasting plasma glucose < 126 mg/dL, DM is confirmed because two A1c tests are positive.

C)    Fasting plasma glucose is 127 mg/dL and on repeat testing is 128 mg/dL, but hemoglobin A1c is 6.4%.

Despite the HbA1c < 6.5%, DM is confirmed because two FPG tests are positive.

D)   Hemoglobin A1c is 7.0% and fasting plasma glucose is 126 mg/dL.

DM is confirmed - 2 independent tests are positive.

E)   Hemoglobin A1c is 7.0% and fasting plasma glucose is 124 mg/dL.

A confirmatory A1c or FPG is needed.

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