No abstract

Aging populations are a world-wide concern. The Chinese demographic statistics announced in March 2021 showed that the percentage of the population 60 years old or more in China was 18.7% (260 million). People experience many physiological and psychological changes in old age, including a decrease in sleep quality and quantity and altered sleep structure. 1 Sleep disturbance of about 50% has been observed among the elderly in many countries. [2][3][4][5][6][7] Sleep disturbance is detrimental to both the physical and mental