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通过两步回归法对空气污染与儿童呼吸病症发生率之间的关系进行了研究.结果表明,颗粒物与大部分儿童呼吸病症发生率之间存在显著的正相关关系,SO2与儿童感冒时气喘有着显著的正相关关联,NOX与儿童未感冒时气喘有显著的正相关关联.两种回归方法的结果基本一致.其中的混合线性模型不但在城市间发现这些正相关关系,而且在城市内的城郊区之间也发现了正相关关联.本文还给出了暴露在各种空气污染物下儿童呼吸病症发生率的比数比(OR).
The relationship between air pollution and the incidence of respiratory illness in children was studied by two-step regression analysis.The results showed that there was a significant positive correlation between the particulate and the incidence of respiratory illness in most children, SO2 was associated with asthma in children with cold There was a significant positive correlation between NOX and asthma in children without colds.The results of the two regression methods were basically the same.The mixed linear model not only found these positive correlations among the cities but also found that in cities within the city A positive correlation was also found between the suburbs and the odds ratio (OR) for the incidence of respiratory illness among children exposed to various air pollutants was also given.