How is HbA1c testing used for diagnosing type 2 diabetes mellitus (DM)?

Updated: Oct 23, 2019
  • Author: Romesh Khardori, MD, PhD, FACP; Chief Editor: George T Griffing, MD  more...
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Answer

HbA1c measurements are the criterion standard for monitoring long-term glycemic control. In the past, HbA1c measurements were not considered useful for the diagnosis of diabetes mellitus, because of a lack of international standardization and insensitivity for the detection of milder forms of glucose intolerance.

In a 2009 report, however, an international expert committee appointed by the ADA, the European Association for the Study of Diabetes, and the International Diabetes Association recommended the HbA1c assay for diagnosing type 1 and type 2 diabetes mellitus. [110]  


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