title: [Risk factors of bronchial asthma among people aged over 14 years in China].
abstract: OBJECTIVE
  To survey the risk factors of asthma among the people aged over 14 years in China.
  
  
  METHODS
  Home visits for completing epidemiological questionnaires in accordance with stratified cluster random sampling survey were conducted in 8 provinces (cities) of China residents aged over 14 years from February 2010 to August 2011. Asthma was diagnosed based upon case history, clinical signs and lung function test. The SPSS 12.0 software was used for statistic analyses for the epidemiological status of asthma.
  
  
  RESULTS
  Sampling population was composed of 180 099 subjects. Among 164 215 valid questionnaires, there were 79 692 males and 84 523 females, 2 034 had asthma. The overall prevalence rate was 1.2% (2 034/164 215). Correlation analyses showed that the risk factors were smoking (OR = 1.697, 95%CI: 1.547-1.861), breast feeding (OR = 0.801, 95%CI: 0.670-0.959), genetics (OR & 95%CI >1, asthma (OR = 10.440, 95%CI: 8.991-12.112)), complications (OR & 95%CI >1), body mass index (compared with normal weight, overweight (OR = 1.360, 95%CI: 1.212-1.531), obesity (OR = 10.631, 95%CI: 9.570-11.801)) and petting (OR & 95%CI >1).
  
  
  CONCLUSIONS
  Among Chinese asthmatics aged over 14, their risk factors include host (genetics & obesity) and environmental (smoking, breastfeeding, complications & pets) factors.
authors.affiliation: Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Xiaokai
authors.initials: X
authors.lastname: Feng
authors.affiliation: Department of Respiratory Medicine, China-Japan Friendship Hospital, Beijing 100029, China. Email: jiangtao_l@263.net.
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Lin
authors.forename: Nan
authors.initials: N
authors.lastname: Su
authors.forename: Guoliang
authors.initials: G
authors.lastname: Liu
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Zhou
authors.forename: Huanying
authors.initials: H
authors.lastname: Wan
authors.forename: Kaisheng
authors.initials: K
authors.lastname: Yin
authors.forename: Lijun
authors.initials: L
authors.lastname: Ma
authors.forename: Changgui
authors.initials: C
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Chuntao
authors.initials: C
authors.lastname: Liu
authors.forename: Hua
authors.initials: H
authors.lastname: Xie
authors.forename: Wei
authors.initials: W
authors.lastname: Tang
authors.forename: Mao
authors.initials: M
authors.lastname: Huang
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.forename: Yuanhua
authors.initials: Y
authors.lastname: Liu
authors.forename: Liqiang
authors.initials: L
authors.lastname: Song
authors.forename: Xianliang
authors.initials: X
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001249:Asthma / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D055815:Young Adult