title: [Risk factors of asthma among children aged 0 - 14 in Suzhou city].
abstract: OBJECTIVE
  This study aimed to investigate risk influencing factors of asthma for children in Suzhou City, China.
  
  
  METHODS
  A survey of asthma was conducted on children aged 0 - 14 with or without asthma from September 2010 to April 2011 in Pingjiang district of Suzhou city. A total of 271 children diagnosed with asthma were considered as a case group, and 271 non-asthmatic children with the same age, sex and living region formed the control group. Risk factors were analyzed with χ(2) test and logistic regression analysis.
  
  
  RESULTS
  All children were Han. The case group was composed of 165 boys and 106 girls, so was the case group. The average age was (7.5 ± 2.3) years for the case group and (7.8 ± 2.9) years for the control group, which did not showed any significant difference (P > 0.05). Family history of allergy (OR = 10.624, 95%CI: 6.294 - 18.623), history of children's eczema (OR = 4.403, 95%CI: 8.627 - 29.632), history of allergic rhinitis (OR = 6.871, 95%CI: 7.658 - 31.871), passive smoking when baby was born (OR = 3.323, 95%CI: 3.541 - 11.634), mold contamination (OR = 1.837, 95%CI: 1.531 - 4.926) were the risk factors, and breast-feeding (OR = 0.513, 95%CI: 0.418 - 0.914) was the protective factor.
  
  
  CONCLUSIONS
  Family history of allergy, history of children's eczema, history of allergic rhinitis, passive smoking, and old contamination are the risk factors, and breast-feeding is the protective factor.
authors.affiliation: Department of Respiratory Medicine, Children's Hospital of Soochow University, Suzhou 215003, China.
authors.forename: Can-hong
authors.initials: CH
authors.lastname: Zhu
authors.forename: Ji-xian
authors.initials: JX
authors.lastname: Liu
authors.forename: Xian-hong
authors.initials: XH
authors.lastname: Zhao
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000209:etiology*; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012307:Risk Factors; D011795:Surveys and Questionnaires