Sleeping problems at 78 degrees north: the Svalbard Study

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.

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.