According to the data of interviews of 4000 subjects, the incidence of sleep disorders is about 30% in different regions of Russia; for the age group of 20 to 24 years it is 5%, for subjects aged over 60-40%. Fourteen percent of men and twenty-four percent of women of capable age (30-59 years) complain of insufficient sleep. The quality of sleep depends on age, sex, constitutional features (excessive or insufficient body weight), and social characteristics (frequent change of working places, change of place of residence (migrations), family status, and microclimate in a family. Health status is the main factor underlying the formation of various sleep disorders. Subjects suffering from sleep disorders earlier develop age-specific diseases, this indicating that biological age-specific processes are accelerated in this patient population.
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