title: Excessive daytime sleepiness among Japanese public transportation drivers engaged in shiftwork.
abstract: OBJECTIVE
  To explore the actual condition of sleep disorders underlying subjective excessive daytime sleepiness (EDS) among train and bus drivers engaged in shiftwork.
  
  
  METHODS
  This study targeted 3109 public transportation drivers. Clinical diagnoses were made based on 147 drivers who claimed to have subjective EDS, and 285 drivers who were judged to have obstructive sleep apnea syndrome (OSAS), based on the screening process.
  
  
  RESULTS
  Among these subjects, the prevalence of OSAS was 3.7% and that of shiftwork disorder (SWD) was 1.5%. SWD was common among drivers who had EDS (32.7% of drivers with EDS), and their EDS severity was higher than that of OSAS drivers. The drivers with SWD were mostly young and neither obese nor hypertensive.
  
  
  CONCLUSIONS
  Encouraging awareness of SWD and OSAS could be necessary to prevent sleepiness-related accidents.
authors.affiliation: Department of Somnology, Tokyo Medical University, Tokyo, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Asaoka
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Namba
authors.forename: Satoru
authors.initials: S
authors.lastname: Tsuiki
authors.forename: Yoko
authors.initials: Y
authors.lastname: Komada
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Inoue
mesh_terms: D000328:Adult; D001334:Automobile Driving; D006970:Disorders of Excessive Somnolence / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D015995:Prevalence; D012891:Sleep Apnea Syndromes / Q000150:complications / Q000453:epidemiology*; D020178:Sleep Disorders, Circadian Rhythm / Q000150:complications / Q000453:epidemiology*; D014940:Work Schedule Tolerance