title: Demographic Factors and their Relation to Fatigue and Mental Disorders in 12-Hour Petrochemical Shift Workers.
abstract: BACKGROUND
  Shift workers may be exposed to fatigue and mental disorders due to various work-related risk factors. This study evaluated the impact of demographic characteristics on fatigue and mental disorders among 12-hour shift workers in petrochemical industries.
  
  
  METHODS
  This study was conducted among 290 shift workers of Pardis Petrochemical Company in Iran. Data were collected using a general questionnaire for the demographic characteristic as well as multidimensional fatigue inventory (MFI-20) and general health questionnaire (GHQ-28).
  
  
  RESULTS
  Married workers were less likely to suffer from reduced activity levels (P< 0.027), depression (P< 0.032) and mental disorders (P< 0.040). Social dysfunction score (P< 0.029) and mental disorders (P< 0.048) decreased with shift work experience. Shift workers with non-academic education less likely to suffer from reduced activity levels (P< 0.000) and mental fatigue (P< 0.028).
  
  
  CONCLUSIONS
  Despite the significant difference between the variables, this study showed a weak effect of individual and occupational demographic characteristics on fatigue and mental disorders.
authors: Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Ahmad
authors: A
authors: Bazazan
authors: Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Yahya
authors: Y
authors: Rasoulzadeh
authors: Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Iman
authors: I
authors: Dianat
authors: Department of Vital Statistics and Epidemiology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Abdolrasoul
authors: A
authors: Safaiyan
authors: Health Safety and Environment Department, Pars Petrochemical Region, Iran.
authors: Zohreh
authors: Z
authors: Mombeini
authors: Health Safety and Environment Department, Pars Petrochemical Region, Iran.
authors: Ehsan
authors: E
authors: Shiravand
keywords: Fatigue; GHQ-28; MFI-20; Mental health; Shift work
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