Abstract
Methods A cross-sectional survey of asthma and allergic diseases in elementary school children was conducted in July 2009. The survey was carried out for all six graders (aged 5-14 years) via parental questionnaires (including the ISAAC core questions) at randomly selected two schools (A and B) which are located in suburban residential area and near industrial complexes, respectively. Data on the lifetime and 1-year asthma symptom prevalence and environmental factors were collected from 2,201 children (School A: n=882, School B: n=1,319) participated in the study. All data were analyzed with SPSS 18.0 and odds ratio was calculated by logistic regression analysis to estimate the combined effects of study factors on Asthma.
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