[Epidemiological study of sleep disorder in the elderly].

As a common health problem in modern society, sleep disorder have a high incidence in the elderly population, which seriously affect the quality of life and physical and mental health of the elderly, and can even aggravate to cause diseases. This review summarizes main research findings in the field of sleep disorder during the past 20 years, describes the sleeping characteristics of elderly, the epidemiological distribution of sleep disorder and possible influencing factors, and finally suggests appropriate measures for the prevention of sleep disorder.