title: Visual Display Terminal use in Iranian bank tellers: Effects on job stress and insomnia.
abstract: BACKGROUND
  Visual Display Terminals (VDTs) are equipments in many workplaces which their use may increase the risk of visual, musculoskeletal and mental problems including insomnia.
  
  
  OBJECTIVE
  To determine the relationship between duration of daily VDT use and insomnia among the Iranian bank tellers.
  
  
  METHODS
  We randomly selected 382 bank tellers working with VDT. Quality of sleep and stress information were collected by Athens Insomnia Scales (AIS) and Demand-Control Model (DCM) model respectively.
  
  
  RESULTS
  Out of 382 participants, 127 (33.2%) had sleep complaints and 255 (66.8%) had no sleep disorders. Moreover, the insomnia symptoms' score were significantly high in the participants having more than 6 hours of daily VDT use after adjusting for multiple confounding factors (P <  0.001). There was no significant relationship between stress and insomnia.
  
  
  CONCLUSIONS
  It seems that the low levels of stress and job satisfaction reduce the impact of VDT on sleep quality in tellers who worked less than 6 hours per day.
authors.affiliation: Environmental Health Research Center, Kurdistan University of Medical sciences, Sanandaj, Iran.
authors.forename: Omid
authors.initials: O
authors.lastname: Giahi
authors.affiliation: Environmental Health Research Center, Kurdistan University of Medical sciences, Sanandaj, Iran.
authors.forename: Behzad
authors.initials: B
authors.lastname: Shahmoradi
authors.affiliation: Department of Occupational Health, Faculty of Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Abdullah
authors.initials: A
authors.lastname: Barkhordari
authors.affiliation: Environmental Health Research Center, Kurdistan University of Medical sciences, Sanandaj, Iran.
authors.forename: Jamshid
authors.initials: J
authors.lastname: Khoubi
mesh_terms: D000328:Adult; D000067012:Banking, Personal; D016288:Computer Terminals; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007492:Iran / Q000453:epidemiology; D007588:Job Satisfaction; D008297:Male; D008875:Middle Aged; D016272:Occupational Health; D012307:Risk Factors; D012890:Sleep; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology*; D013315:Stress, Psychological / Q000453:epidemiology*; D013997:Time Factors; D055815:Young Adult
keywords: Sleep disorders; VDT; ergonomics; occupational health