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Comment & Response |

US Trends for Diabetes Prevalence Among Adults—Reply

Andy Menke, PhD1; Sarah Casagrande, PhD1; Catherine C. Cowie, PhD2
[+] Author Affiliations
1Social & Scientific Systems, Silver Spring, Maryland
2National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
JAMA. 2016;315(7):705-706. doi:10.1001/jama.2015.16473.
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In Reply Dr Magliano and colleagues raise concern regarding our use of all 3 glycemic markers (hemoglobin A1c, FPG, and 2-hour PG) in defining undiagnosed diabetes, and of the lack of repeat testing in the National Health and Nutrition Examination Survey (NHANES).

We agree that FPG and 2-hour PG may represent complementary pathophysiological processes of diabetes and using both may be logical when defining diabetes. However, hemoglobin A1c is a valid diagnostic marker that is commonly used in clinical practice and has less day-to-day variability than the other markers.1 All 3 markers are associated with diabetes complications.2 Based on this evidence, the American Diabetes Association (ADA) revised its diagnostic criteria in 2010 recommending the addition of hemoglobin A1c as a diagnostic test for diabetes,2 and the World Health Organization (WHO) made a similar revision to its diagnostic criteria in 2011.3


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February 16, 2016
Dianna J. Magliano, PhD; Paul Zimmet, PhD, FRACP; Jonathan Shaw, FRACP
1Baker IDI Heart and Diabetes Institute, Melbourne, Australia
JAMA. 2016;315(7):705. doi:10.1001/jama.2015.16455.
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