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Sleeping problems at 78 degrees north: the Svalbard Study

O Nilssen1, R Lipton, T Brenn

  • 1Institute of Community Medicine, University of Tromsö, Norway.

Acta Psychiatrica Scandinavica
|January 1, 1997
PubMed
Summary
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Arctic populations experience significant sleep disturbances, with Russians on Svalbard reporting nearly fourfold higher prevalence of sleep problems compared to Norwegians. This suggests inadequate acclimatization may contribute to sleep issues in the extreme northern climate.

Area of Science:

  • Arctic Medicine
  • Sleep Science
  • Epidemiology

Background:

  • Extreme arctic climates present unique challenges to human health and well-being.
  • Sleep disturbances are a common complaint, potentially influenced by environmental and ethnic factors.

Purpose of the Study:

  • To compare the prevalence and characteristics of sleep problems between two ethnically distinct populations (Norwegians and Russians) residing in the same extreme arctic environment.
  • To investigate potential factors associated with sleep disturbances in these populations.

Main Methods:

  • A cross-sectional study involving 453 Norwegians and 450 Russians (aged 18+) living on Svalbard.
  • Data collection included self-reported sleep problems, demographic information, and associated lifestyle/health factors.

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Main Results:

  • Russians exhibited a nearly fourfold higher prevalence of sleep problems (77-81%) compared to Norwegians (22-25%).
  • Russian sleep problems decreased with age and were more frequent during the polar night, unlike Norwegians.
  • Common sleep issues included difficulty falling asleep, feeling unrested, and nocturnal awakenings, associated with factors like depression and shift work.

Conclusions:

  • Significant ethnic disparities in sleep problem prevalence exist among populations in the extreme arctic.
  • Inadequate acclimatization to the arctic environment is postulated as a key factor for the higher prevalence observed in the Russian population.
  • Further research is needed to understand the specific mechanisms of acclimatization and its impact on sleep in arctic dwellers.