title: Comparison of risk factors for recurrent respiratory infections between urban and rural preschool children in Yiwu, China.
abstract: BACKGROUND
  Many studies have shown an association between the risk of increased recurrent respiratory infections and socioeconomic and fostering factors, but often only a few risk factors have been studied. This study aimed to identify and compare such factors between urban and rural preschool children.
  
  
  METHODS
  Case control studies were conducted in Yiwu urban and rural areas respectively in Zhejiang Province. A structured questionnaire was used to collect information on influencing factors such as socioeconomic factors, fostering factors, and housing conditions. The chi-square test was used to compare the distribution of some health related factors between urban and rural children. Risk factor analyses were also made in urban and rural children respectively. Univariate and multivariate analyses were made using the binary logistic regression.
  
  
  RESULTS
  Multivariate analysis showed that maternal age (OR=0.94, 95%CI: 0.89-0.99), asthma (OR=2.34, 95%CI: 1.22-4.48), rickets (OR=5.03, 95%CI: 2.10-12.05), snack (OR=1.62, 95%CI: 1.19-2.20), traffic mode (OR=1.38, 95%CI: 1.03-1.86), living with patients with chronic respiratory system disease (OR=1.79, 95%CI: 1.02-3.15), and indoor passive smoking (OR=1.46, 95%CI: 1.02-2.10) were the influencing factors for recurrent respiratory infections in urban children. Rickets (OR=3.77, 95% CI: 1.13-12.65) and passive smoking (OR=2.33, 95% CI: 1.17-4.65) were the influencing factors for recurrent respiratory infections in rural children.
  
  
  CONCLUSIONS
  Public health measures against risk factors should be taken to prevent the occurrence of recurrent respiratory infections in urban and rural children respectively.
authors.affiliation: Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, 310051, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zou
authors.forename: Hong-Xing
authors.initials: HX
authors.lastname: Jin
authors.forename: Rong-Shan
authors.initials: RS
authors.lastname: Wang
authors.forename: Hai-Feng
authors.initials: HF
authors.lastname: Li
authors.forename: Pei-Gang
authors.initials: PG
authors.lastname: Jin
mesh_terms: D016022:Case-Control Studies; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D006801:Humans; D012008:Recurrence; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D012307:Risk Factors; D012423:Rural Health; D014504:Urban Health