title: [Epidemiological data of chronic obstructive pulmonary disease in Yanqing County in Beijing].
abstract: OBJECTIVE
  To evaluate the epidemiological characteristic and risk factors of chronic obstructive pulmonary disease (COPD) in the rural area of Beijing.
  
  
  METHODS
  The data of 1,624 people aged more than 40 in 5 villages in Yanqing County in Beijing were collected. The habitation condition, life and cooking habit, smoking history, personal history and family history were asked, and their physical examinations and lung function tests were conducted.
  
  
  RESULTS
  The prevalence of COPD was 9.11% in this area, 15.05% in males and 3.76% in females. There were significant differences in sex, age, smoking history, family history, frequent cough before age 14 and body index between the COPD and non-COPD groups. The prevalence of corpulmonale was 1.66% in this area.
  
  
  CONCLUSIONS
  The prevalence of COPD was high in this area and related with sex, age, smoking history, family history, frequent cough before age 14 and low body index. Other factors such as environment, working exposure need to be studied in the future. COPD is a major public health problem, which should claim more attention.
authors.affiliation: Department of Respiratory Medicine, Peking University Third Hospital, Beijing 100083, China.
authors.forename: Wan-zhen
authors.initials: WZ
authors.lastname: Yao
authors.forename: Hong
authors.initials: H
authors.lastname: Zhu
authors.forename: Ning
authors.initials: N
authors.lastname: Shen
authors.forename: Xiang
authors.initials: X
authors.lastname: Han
authors.forename: Yan-jing
authors.initials: YJ
authors.lastname: Liang
authors.forename: Li-qiang
authors.initials: LQ
authors.lastname: Zhang
authors.forename: Yong-chang
authors.initials: YC
authors.lastname: Sun
authors.forename: Zhen-ting
authors.initials: ZT
authors.lastname: Hao
authors.forename: Ming-wu
authors.initials: MW
authors.lastname: Zhao
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology*; D012307:Risk Factors; D012423:Rural Health; D012737:Sex Factors; D012907:Smoking