Journal
AMERICAN JOURNAL OF PREVENTIVE MEDICINE
Volume 40, Issue 1, Pages 11-17Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.amepre.2010.09.022
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Funding
- CDC
- Robert Wood Johnson Foundation [57398]
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Background: The American Diabetes Association (ADA) recently proposed the use of hemoglobin A1c as a practical and valid strategy to identify high-risk people for whom delivery of an intensive lifestyle intervention to prevent type 2 diabetes is likely to be cost effective. Purpose: To estimate composite risks of developing diabetes and cardiovascular disease (CVD) for adults with different hemoglobin A1c test results and to compare those risks with those of adults who met the 2003 ADA definition for prediabetes. Methods: Cross-sectional data from the 2005-2006 National Health and Nutrition Examination Survey were analyzed in 2009. The method of Stern and colleagues was used to estimate the 7.5-year probability of type 2 diabetes, and the Framingham General CVD Risk Engine was used to estimate the 10-year probability of CVD for adults with different A1c results. Sample weights were used to account for sampling probability and to adjust for noncoverage and nonresponse. Results: Among adults meeting the 2003 ADA definition for prediabetes, the probabilities for incident type 2 diabetes (over 7.5 years) and CVD (over 10 years) were 33.5% and 10.7%, respectively. Use of A1c alone, in the range of 5.5% to < 6.5%, would identify a population with comparable risks for diabetes (32.4% [SE = 1.2%]) and CVD (11.4% [SE = 0.6%]). A slightly higher cutoff (>= 5.7%) would identify adults with risks of 41.3% (SE = 1.5%) for diabetes and 13.3% (SE = 0.8%) for CVD risks that are comparable to people enrolled in the Diabetes Prevention Program. Conclusions: A1c-based testing in clinical settings should be considered as a means to identify greater numbers of adults at high risk of developing type 2 diabetes and CVD. (Am J Prev Med 2011; 40(1): 11-17) (C) 2011 American Journal of Preventive Medicine
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