title: Extended work hours and risk of acute occupational injury: A case-crossover study of workers in manufacturing.
abstract: OBJECTIVE
  This study was designed to determine whether injury risk among manufacturing workers was related to hours worked during the previous week.
  
  
  METHODS
  A case-crossover design was utilized to contrast hours worked prior to an injury shift with those worked prior to a non-injury shift for hourly workers. Paired t-tests were used to determine significance of the difference. Conditional logistic regression was used to assess dose-response.
  
  
  RESULTS
  Hours worked prior to injury significantly exceeded hours during the control week. Workers who worked more than 64 hr in the week before the shift had an 88% excess risk compared to those who worked 40 hr or fewer, P < 0.05.
  
  
  CONCLUSIONS
  The study provides evidence that injury risk is related to time worked during the previous week. Control of overtime in manufacturing may reduce risk of worker injury.
authors.affiliation: Yale Occupational and Environmental Medicine Program, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.
authors.forename: S
authors.initials: S
authors.lastname: Vegso
authors.forename: L
authors.initials: L
authors.lastname: Cantley
authors.forename: M
authors.initials: M
authors.lastname: Slade
authors.forename: O
authors.initials: O
authors.lastname: Taiwo
authors.forename: K
authors.initials: K
authors.lastname: Sircar
authors.forename: P
authors.initials: P
authors.lastname: Rabinowitz
authors.forename: M
authors.initials: M
authors.lastname: Fiellin
authors.forename: M B
authors.initials: MB
authors.lastname: Russi
authors.forename: M R
authors.initials: MR
authors.lastname: Cullen
mesh_terms: D000062:Accidents, Occupational / Q000706:statistics & numerical data*; D000328:Adult; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology*; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D014940:Work Schedule Tolerance