title: Five-factor personality traits and sleep: evidence from two population-based cohort studies.
abstract: OBJECTIVE
  The current study examines associations between five factor personality traits and average sleep duration, sleep deficiency, and sleep problems.
  
  
  METHODS
  The participants were from two population-based samples from Australia (n = 1,104, age range 31-41) and Finland (n = 1,623, age range 30-45). Self-reports of sleep behavior, sleep problems (Jenkin's scale), and five factor model personality traits (NEO-FFI) were collected. Associations between personality traits and sleep were analyzed with linear regressions.
  
  
  RESULTS
  The results showed that higher extraversion, agreeableness, and conscientiousness were, in general, associated with better sleep, whereas higher neuroticism was associated with sleeping less well. Openness was not associated with sleep. Most of the associations were replicable between the samples from the two countries, but personality traits explained only small part of the variance in sleep behavior.
  
  
  CONCLUSIONS
  Increasing the knowledge on personality and sleep may benefit more personalized treatment of sleep disorders and help in personnel selection to jobs in which it is critical to stay alert. However, longitudinal research is needed to confirm the current findings.
authors.affiliation: Helsinki Collegium for Advanced Studies, University of Helsinki.
authors.forename: Mirka
authors.initials: M
authors.lastname: Hintsanen
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Sampsa
authors.initials: S
authors.lastname: Puttonen
authors.affiliation: Menzies Research Institute Tasmania, University of Tasmania.
authors.forename: Kylie
authors.initials: K
authors.lastname: Smith
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Maria
authors.initials: M
authors.lastname: Törnroos
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Markus
authors.initials: M
authors.lastname: Jokela
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Laura
authors.initials: L
authors.lastname: Pulkki-Råback
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Taina
authors.initials: T
authors.lastname: Hintsa
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Päivi
authors.initials: P
authors.lastname: Merjonen
authors.affiliation: Murdoch Children's Research Institute, Royal Children's Hospital.
authors.forename: Terence
authors.initials: T
authors.lastname: Dwyer
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital.
authors.forename: Olli T
authors.initials: OT
authors.lastname: Raitakari
authors.affiliation: Menzies Research Institute Tasmania, University of Tasmania.
authors.forename: Alison
authors.initials: A
authors.lastname: Venn
authors.affiliation: IBS, Unit of Personality Work and Health Psychology, University of Helsinki.
authors.forename: Liisa
authors.initials: L
authors.lastname: Keltikangas-Järvinen
mesh_terms: D000328:Adult; D001008:Anxiety Disorders; D001315:Australia; D015331:Cohort Studies; D005120:Extraversion, Psychological; D005260:Female; D005387:Finland; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D000075384:Neuroticism; D010551:Personality; D057566:Self Report; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000523:psychology*; D012923:Social Class; D013997:Time Factors