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

Evelyn P. Davila, Hermes Florez, Mary Jo Trepka, Lora E. Fleming, Theophile Niyonsenga, David J. Lee, Jai Parkash

Research output: Contribution to journalArticle

11 Scopus citations


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

Original languageEnglish (US)
Pages (from-to)375-383
Number of pages9
JournalAmerican Journal of Industrial Medicine
Issue number5
StatePublished - May 1 2011



  • Hemoglobin A1C
  • NHANES survey data
  • Suboptimal and poor glycemic control
  • Type 2 diabetes workers
  • Type of occupation
  • Work hours

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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