International Journal of Medicine and Medical Sciences

Full Length Research Paper

Sleep disorders in 45–69-year-old population in Russia/Siberia (Epidemiology study)

Valery V. Gafarov^1,2,  Igor V. Gagulin^1,2,  Elena A. Gromova^1,2,  Almira V. Gafarova^1,2

¹Federal State Budgetary Institution, the Research Institute of Internal Medicine of Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, Russia.

²The Interdepartmental Laboratory of Cardiovascular Disease Epidemiology of Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, Russia.

*Corresponding author E-mail: [email protected] Tel./Fax: +738322642516

Accepted 27 June, 2013

Abstract

The aim of the study was to elucidate the epidemiological characteristics of the sleep disturbances in population of Novosibirsk (Siberia, Russia). A randomized representative sample of 45–69-year-old residents of both genders (n = 4171) was studied in a framework of the HAPIEE study in Novosibirsk from 2003 to 2005. The sleep disturbances were studied by using the Jenkins Sleep Questionnaire (JSQ). The test was validated for the Russian population in the course of a large-scale epidemiological study performed in a framework of the WHO MONICA Program from 1984 to 1994. The incidence rate of the extreme and pronounced sleep disturbances was 21% of the population with female predominance (24% in women vs. 18% in men). The patterns of the sleep disturbances lasting 15 and more nights per month were as follows: frequent spontaneous sleep interruptions (20%); anxious thoughts while falling asleep (10%); unsatisfying sleep (10%); and disturbing dreams (7%). The rate of the disorders with the insufficient or excessive sleep duration was 7%. Sleep duration of less than 5 hours per night was found in 5% of population; sleep duration of more than 10 hours per night was detected in less than 2% of population. Extreme and pronounced abnormalities in the sleep duration were found in 61% of population. Data showed high prevalence of the sleep disturbances associated with a high level of psychosocial factors in the study population. The study demonstrated a great demand in prevention of the sleep disturbances in 45–69-year-old population.

Key words: Epidemiology, population study, sleep disorders, insomnia, sleep disturbances.