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Am J Ind Med. 2011 May;54(5):375-83. doi: 10.1002/ajim.20923. Epub 2011 Jan 18.

Long work hours is associated with suboptimal glycemic control among US workers with diabetes.

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  • 1Department of Epidemiology and Public Health, University of Miami Miller School of Medicine, Florida 33136, USA. iyl7@cdc.gov



Increasing numbers of US workers are diabetic. We assessed the relationship between glycemic control and work hours and type of occupation among employed US adults with type 2 diabetes.


Data were obtained from the 1999-2004 National Health and Nutrition Examination Survey (NHANES). A representative sample of employed US adults ≥20 years with self-reported type 2 diabetes (n = 369) was used. Two dichotomous glycemic control indicators, based on various HbA1c level cut-points, were used as dependent variables in weighted logistic regression analyses with adjustment for confounders.


Adults working over 40 hr/week were more likely to have suboptimal glycemic control (HbA1c ≥ 7%) compared to those working 20 hr or less (odds ratio = 5.09; 95% confidence interval: [1.38-18.76]).


Work-related factors, such as number of hours worked, may affect the ability of adults with type 2 diabetes to reach and maintain glycemic control goals. These factors should be considered in the development of workplace policies and accommodations for the increasing number of workers with type 2 diabetes.

Copyright © 2011 Wiley-Liss, Inc.

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