ObjectiveTo discuss the relationship between air pollution and the incidence rate of asthma in children. MethodsA total of 1200 children permanently living in different air pollution regions in a city were enrolled, including 400 children from heavily polluted region, 400 children from moderately polluted region and 400 children from slightly polluted region.The epidemiological characteristics of children with asthma was statistically analyzed, and the risk factors of air pollution that lead to asthma in children was determined by single factor variance and multiple factor Logistic regression analysis. ResultsThere were 94 cases with asthma in the 1200 children, the incidence rate of asthma was 7.83%, male, age less than 5 years old, air pollution of residential area more than 5 years of time had a higher incidence rate, and asthma in chronic persistent accounts for more percentage. the main clinical symptoms of asthma were cough, dyspnea, chest tightness, shortness of breath,the lungs heard and diffuse wheezing. The children who living in adverse circumstances (such as passive smoking, family smoking, domestic fur animals, not to install fume hood, poor indoor ventilation condition, protection with out mask, near distance pollution source, heavily polluted region) had a significantly higher detection rate of asthma compare with those living in good circumstances (P＜0.05). Severe air pollution, near pollution source and passive smoking were the independent risk factors of asthma in children, while the install fume hood and mask protection were the protective factors. ConclusionsSevere air pollution, near pollution source and passive smoking are the independent risk factors of asthma in children, and the install fume hood and mask protection are the protective factors. Some comprehensive measures must be taken to reduce the morbidity of asthma in children, and promote the normal development of children.

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