title: Patterns of lung function in asymptomatic nonsmoking men and women in the People's Republic of China.
abstract: OBJECTIVE
  To evaluate patterns of lung function in healthy, working Chinese men and women in different geographic areas of the People's Republic of China (PRC).
  
  
  METHODS
  We conducted lung function tests on 2926 asymptomatic, never smoking Chinese men and women aged 35-56 years residing in or around Beijing and Guangzhou. Within each of these locations, separate urban and rural samples were recruited.
  
  
  RESULTS
  Age and height adjusted lung function was greater in Beijing than in Guangzhou, and within each city for residents of rural vs. urban areas. Among women, estimated rates of lung aging were greater in Beijing than in Guangzhou, and in urban vs. rural areas. Both FEV(1) and FVC exhibited a curvilinear association with body mass index.
  
  
  CONCLUSIONS
  Lung function data from this largely working cohort exhibited marked geographic and urban-rural differences in this never smoking, adult Chinese cohort. Such variation is not uncommon and may reflect differences in body size, diet, and environmental and occupational exposures across these different settings. Caution should be used in applying published reference equations to populations from different parts of the PRC.
authors.affiliation: Kaiser Permanente Center for Health Research, Portland, OR, USA.
authors.forename: W M
authors.initials: WM
authors.lastname: Vollmer
authors.forename: R
authors.initials: R
authors.lastname: Tsai
authors.forename: Y
authors.initials: Y
authors.lastname: Wu
authors.forename: Y H
authors.initials: YH
authors.lastname: Li
authors.forename: L R
authors.initials: LR
authors.lastname: Johnson
authors.forename: O D
authors.initials: OD
authors.lastname: Williams
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: X
authors.initials: X
authors.lastname: Rao
authors.forename: A S
authors.initials: AS
authors.lastname: Buist
mesh_terms: D000328:Adult; D000367:Age Factors; D001824:Body Constitution; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D004032:Diet; D005260:Female; D005843:Geography; D006801:Humans; D008168:Lung / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure; D012016:Reference Values; D012129:Respiratory Function Tests; D012424:Rural Population; D012737:Sex Factors; D014505:Urban Population