title: Sleep duration and quality among different occupations--China national study.
abstract: OBJECTIVE
  To examine the associations between occupation, sleep duration and sleep quality.
  
  
  METHODS
  The data for this study was extracted from data collected from the 2008 Chinese Sub-optimal Health Study. Our study sample consisted of 18,316 Chinese subjects aged 18-65. Occupation and other relevant characteristics to sleep were collected. We used the Pittsburgh Sleep Quality Index (PSQI) to measure sleep quality and multiple logistic regression models to examine the association of occupation with shortened sleep duration and poor sleep quality.
  
  
  RESULTS
  Farmers had the longest sleep duration (mean=8.22 hours) while the civil servants had the shortest sleep duration (mean=7.85 hours). Farmers also had the best sleep quality (mean score=3.74) while professional workers had the worst sleep quality (mean score=4.87). Compared to civil servants, the OR of shortened sleep duration and poor sleep quality for blue collar workers is 1.39 (95%CI: 1.11-1.73) and 1.28 (95%-CI: 1.15-1.42), respectively, after adjusting for age, sex, marital status, education, area, smoking, drinking, pain, and health status.
  
  
  CONCLUSIONS
  sleep duration and quality varied among different Chinese occupation populations. The blue collar workers are more likely to have shortened sleep duration and poor sleep quality.
authors.affiliation: School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, China; School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, 70112, United States of America.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Sun
authors.affiliation: Department of Epidemiology, School of Public Health, Jilin University, Changchun, 130021, China.
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Ningxia Autonomous Region Department of Public Health. Yinchuan, Ningxia, 750001, China.
authors.forename: Jingqin
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine. New Orleans, LA, 70112, United States of America.
authors.forename: Changwei
authors.initials: C
authors.lastname: Li
authors.affiliation: Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, GA, United States of America.
authors.forename: Tingting
authors.initials: T
authors.lastname: Liu
authors.affiliation: School of Science and Engineering, Tulane University, New Orleans, LA, 70112, United States of America.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Lin
authors.affiliation: Department of Infectious Diseases, School of Medicine, Tulane University, New Orleans, LA, 70112, United States of America.
authors.forename: Abby
authors.initials: A
authors.lastname: Lau
authors.affiliation: Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, 215123, China.
authors.forename: Chongke
authors.initials: C
authors.lastname: Zhong
authors.affiliation: Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine. New Orleans, LA, 70112, United States of America; Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, 215123, China.
authors.forename: Tan
authors.initials: T
authors.lastname: Xu
authors.affiliation: Department of Epidemiology and Statistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences; School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.
authors.forename: GuangLiang
authors.initials: G
authors.lastname: Shan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009790:Occupations; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires; D013997:Time Factors; D055815:Young Adult