Associations of reported bruxism with insomnia and insufficient sleep symptoms among media personnel with or without irregular shift work

Head Face Med. 2008 Feb 28;4:4. doi: 10.1186/1746-160X-4-4.


Background: The aims were to investigate the prevalence of perceived sleep quality and insufficient sleep complaints, and to analyze whether self-reported bruxism was associated with perceptions of sleep, and awake consequences of disturbed sleep, while controlling confounding factors relative to poor sleep.

Methods: A standardized questionnaire was mailed to all employees of the Finnish Broadcasting Company with irregular shift work (n = 750) and to an equal number of randomly selected controls in the same company with regular eight-hour daytime work.

Results: The response rate in the irregular shift work group was 82.3% (56.6% men) and in the regular daytime work group 34.3% (46.7% men). Self-reported bruxism occurred frequently (often or continually) in 10.6% of all subjects. Altogether 16.8% reported difficulties initiating sleep (DIS), 43.6% disrupted sleep (DS), and 10.3% early morning awakenings (EMA). The corresponding figures for non-restorative sleep (NRS), tiredness, and sleep deprivation (SLD) were 36.2%, 26.1%, and 23.7%, respectively. According to logistic regression, female gender was a significant independent factor for all insomnia symptoms, and older age for DS and EMA. Frequent bruxism was significantly associated with DIS (p = 0.019) and DS (p = 0.021). Dissatisfaction with current work shift schedule and frequent bruxism were both significant independent factors for all variables describing insufficient sleep consequences.

Conclusion: Self-reported bruxism may indicate sleep problems and their adherent awake consequences in non-patient populations.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Case-Control Studies
  • Female
  • Finland
  • Health Surveys
  • Humans
  • Male
  • Mass Media*
  • Middle Aged
  • Prevalence
  • Sleep Bruxism / complications*
  • Sleep Disorders, Circadian Rhythm / epidemiology*
  • Sleep Initiation and Maintenance Disorders / epidemiology*