title: 24-hour work shifts, sedentary work, and obesity in male firefighters.
abstract: Little is known about the occupational risk factors for obesity in US firefighters.
  
  
  
  308 male California firefighters, who participated in a work and obesity project, were chosen. Working conditions were measured with a firefighter-specific occupational health questionnaire. Adiposity was clinically assessed using body mass index (BMI), waist circumference (WC), and body fat percent.
  
  
  
  In a multivariate analysis, the prevalence of obesity by all measures was significantly higher (PRs = 3.69-6.03, P < 0.05) in the firefighters who reported seventeen to twenty-one shifts than those who reported eight to eleven shifts in the past month. Prolonged sedentary work was also a risk factor for obesity by BMI (PR = 4.18, P < 0.05). Furthermore, there was a linear dose-response relationship of obesity by BMI and WC with the number of 24-hr shifts and sedentary work.
  
  
  
  Many additional 24-hr shifts and prolonged sedentary work substantially increased the risk for obesity in male firefighters. Am. J. Ind. Med. 59:486-500, 2016. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Center for Occupational and Environmental Health, University of California, Irvine, California.|Program in Public Health, University of California, Irvine, California.
authors.forename: BongKyoo
authors.initials: B
authors.lastname: Choi
authors.affiliation: Center for Occupational and Environmental Health, University of California, Irvine, California.|Center for Social Epidemiology, Marina Del Rey, California.
authors.forename: Marnie
authors.initials: M
authors.lastname: Dobson
authors.affiliation: Center for Occupational and Environmental Health, University of California, Irvine, California.|Center for Social Epidemiology, Marina Del Rey, California.
authors.forename: Peter
authors.initials: P
authors.lastname: Schnall
authors.affiliation: Center for Occupational and Environmental Health, University of California, Irvine, California.|Program in Public Health, University of California, Irvine, California.
authors.forename: Javier
authors.initials: J
authors.lastname: Garcia-Rivas
mesh_terms: D050154:Adiposity; D000328:Adult; D000704:Analysis of Variance; D015992:Body Mass Index; D002140:California / Q000453:epidemiology; D061388:Firefighters; D006801:Humans; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D009765:Obesity / Q000453:epidemiology*; D010561:Personnel Staffing and Scheduling; D015995:Prevalence; D015203:Reproducibility of Results; D012307:Risk Factors; D057185:Sedentary Behavior; D012890:Sleep; D011795:Surveys and Questionnaires; D055105:Waist Circumference
keywords: California; body fat percent; body mass index; waist circumference; working conditions