title: Prevalence of risk factors for obstructive sleep apnea syndrome in interstate bus drivers.
abstract: OBJECTIVE
  To determine the prevalence of risk factors for obstructive sleep apnea syndrome in interstate bus drivers.
  
  
  METHODS
  This study involved 262 professional interstate bus drivers employed by a Brazilian company headquartered in the Federal District. The drivers were evaluated using a questionnaire designed to assess respiratory sleep disorders, the Epworth Sleepiness Scale, test of sustained attention, test of divided attention and anthropometric measurements.
  
  
  RESULTS
  Body weight was found to be above the ideal in 68% of the drivers evaluated, 34% of which had a neck circumference = 42 cm. During the study period, the drivers reported using tobacco (27%), cola-based soft drinks (55%), alcohol (65%) and coffee (88%). The Epworth Sleepiness Scale score was = 10 points in 28%. Snoring was reported by 36%, sleep apnea by 5%, a sensation of suffocation during sleep by 12%, restless sleep by 29% and drowsiness while driving by 48%. There were 42% who had been involved in transit accidents, 7.6% of which were attributed to hypersomnolence. Those scoring higher than 10 of the Epworth Sleepiness Scale presented lower levels of sustained attention. In addition, a reduction in divided attention was found to correlate with greater daytime sleepiness and larger neck circumference.
  
  
  CONCLUSIONS
  The rate of stimulant use found in the group of drivers evaluated is alarming. The high prevalence of daytime sleepiness indicates that attentiveness is reduced in this population.
authors.affiliation: Universidade de Brasília, School of Medicine, Brasilia, Federal District, Brazil. pneumo@unb.br
authors.forename: Carlos Alberto de Assis
authors.initials: CA
authors.lastname: Viegas
authors.forename: Haroldo Willuweit
authors.initials: HW
authors.lastname: de Oliveira
mesh_terms: D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D000328:Adult; D001334:Automobile Driving / Q000706:statistics & numerical data*; D015992:Body Mass Index; D001938:Brazil / Q000453:epidemiology; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018986:Motor Vehicles; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D015995:Prevalence; D012307:Risk Factors; D020181:Sleep Apnea, Obstructive / Q000150:complications / Q000453:epidemiology*; D011795:Surveys and Questionnaires