title: [Partial canonical correlation analysis on the association between quality of sleep and quality of life among residents in Suzhou city].
abstract: OBJECTIVE
  To explore the association between quality of sleep and quality of life among residents of Suzhou city.
  
  
  METHODS
  A total of 3225 residents at the age of 18 - 55 years old in Suzhou city were selected through a clustered sampling method. All the participants were comprehensively evaluated on their quality of sleep by Pittsburgh Sleep Quality Index (PSQI) and on their quality of life (QOL) by SF-36 quality of life scale. Partial canonical correlation analysis was performed.
  
  
  RESULTS
  Negative relationships were noticed between all the dimensions of sleep quality white all the QOL domains remained significant when the confounding effect of age, gender, marital status, occupation and cultural level were adjusted. The first pair of canonical correlation variances showed statistically significant differences, with 0.7978 of canonical correlation coefficient, 1.7505 of eigenvalue, and 92.43% of proportion. Data on daytime dysfunction, sleep disturbances and subjective sleep quality were inversely associated with factors as vitality, general health perceptions and mental health, respectively, after controlling for covariates. The inverse relationship between the quality of sleep and the quality of life mainly manifested the following aspects: the association between the status of daytime dysfunction, sleep disturbances, subjective quality of sleep and vitality, general health perceptions and mental health.
  
  
  CONCLUSIONS
  Quality of sleep had influenced the quality of life, overall health and mental health. Daytime dysfunction, sleep disturbances and subjective sleep quality seemed the main factors in Suzhou city. Intervention programs related to improving the sleep need to be popularized among the residents, so as to make the quality of life better.
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Medical College of Soochow University, Suzhou 215123, China.
authors.forename: Mo
authors.initials: M
authors.lastname: Zhou
authors.forename: Mei
authors.initials: M
authors.lastname: Chen
authors.forename: Pei
authors.initials: P
authors.lastname: Feng
authors.forename: Hui
authors.initials: H
authors.lastname: Liang
authors.forename: Wei-Jun
authors.initials: WJ
authors.lastname: Tong
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Zhang
authors.forename: Tan
authors.initials: T
authors.lastname: Xu
authors.forename: Guang-Liang
authors.initials: GL
authors.lastname: Shan
mesh_terms: D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D012890:Sleep; D011795:Surveys and Questionnaires; D055815:Young Adult