关键词: 睡眠, 中年人, 老年人, 身体成分

Abstract: Objective　To investigate the effects of sleep quality and sleep time on body composition in adults over 50 years old in Urumqi.Methods　A total of 845 people over the age of 50 who were physically examined at a physical examination center in Urumqi between December 2016 and March 2017 were randomly selected to complete a questionnaire survey and body composition measurements.The questionnaire survey included general conditions，including the Pittsburgh Sleep Quality Index（PSQI，with PSQI scores>7 indicating poor sleep quality and PSQI scores≤7 indicating good sleep quality），and the bioelectrical impedance method was used to measure body composition.The body height，body weight，waist-to-hip ratio，body fat mass，body fat percentage，liposuction quality，muscle mass，limb muscle mass，trunk muscle mass of the subjects were measured，and body mass index（BMI） and fat tissue index（FMI） were calculated.Multivariate Logistic regression was used to analyze the effect of sleep quality and sleep time on obesity and excessive body fat percentage.Results　Among the 845 subjects，162 were males，and 683 were females.The mean age was（64.2±7.7） years.There were 37 men（22.8%） and 231 women（33.8%） with poor sleep quality.The body fat mass，body fat percentage， BMI，obesity prevalence，FMI of women with better sleep quality were all lower than those in women with poor sleep quality（P<0.05）.There were no significant differences in body composition among males in the different sleep quality and sleep time groups（P>0.05）.Body fat mass，body fat percentage， BMI，obesity prevalence，FMI of female sleep time <6 h were higher than sleep time 6-8 h，>8 h（P<0.05）.Multivariate Logistic regression was used to analyze the effects of sleep quality and sleep time on obesity and body fat percentage.After adjustment for age，nationality，education level，monthly income，and marital status，the risk of obesity was higher in women with poor sleep quality than in women with good sleep quality〔OR=1.83，95%CI （1.21，2.76），P<0.05〕.With sleep times of 6-8 h，the risk of obesity and body fat percentage exceeding the standard was higher in women with a sleep time of <6 h〔OR=1.77，95%CI（1.17，2.66），P<0.05；OR=1.65，95%CI（1.16，2.37），P<0.05〕.Conclusion　Sleep quality and sleep time affect body composition in females over 50 years old in Urumqi but do not affect body composition in men.Improving sleep quality and increasing sleep time in middle-aged women will help reduce body fat mass and the incidence of obesity，thereby promoting the health of elderly women.

Key words: Sleep, Middle aged, Aged, Body composition