title: Prevalence and risk factors of subjective sleepiness in the general adult population.
abstract: OBJECTIVE
  The aim of this study was to investigate the prevalence and risk factors of self-reported excessive daytime sleepiness (EDS) in Norway.
  
  
  METHODS
  The Epworth Sleepiness Scale was administered by a telephone interview to a random sample of 2301 adult inhabitants of Norway. Questions of demography, symptoms of sleep disorders, and depression were included.
  
  
  METHODS
  Norway.
  
  
  METHODS
  Two thousand three hundred one subjects, 18 years and older.
  
  
  METHODS
  N/A.
  
  
  RESULTS
  The mean score of the Epworth Sleepiness Scale was 6.95 (SD = 3.8), and 17.7% had a score (> 10), indicating EDS. Univariate logistic regression analyses showed that being a man; living in southern Norway; working nights; being young; having symptoms of cataplexy, restless legs, or periodic limb movement in sleep; having breathing pauses in sleep; and having symptoms of depression were significantly related to EDS. Of these 9 predictors, only symptoms of restless legs did not maintain the significant relationship with EDS when a multiple logistic regression analysis was performed.
  
  
  CONCLUSIONS
  The prevalence of EDS was high in this adult Norwegian population sample. EDS seems to be related to several symptoms of sleep disorders.
authors.affiliation: Department of Psychosocial Science, University of Bergen, Norway. staale.pallesen@psysp.uib.no
authors.forename: Ståle
authors.initials: S
authors.lastname: Pallesen
authors.forename: Inger Hilde
authors.initials: IH
authors.lastname: Nordhus
authors.forename: Siri
authors.initials: S
authors.lastname: Omvik
authors.forename: Børge
authors.initials: B
authors.lastname: Sivertsen
authors.forename: Grethe S
authors.initials: GS
authors.lastname: Tell
authors.forename: Bjørn
authors.initials: B
authors.lastname: Bjorvatn
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D012044:Regression Analysis; D012307:Risk Factors