Association between air pollution and asthma and persistent wheezing stratified by GSTP1 genotypes in two-pollutant models.

Two-stage hierarchical analysis adjusting for age, sex, parental education, yearly income, during of breast feeding, gestational age, maternal smoking during pregnancy, environmental tobacco smoke, cockroaches note monthly, carpet, pets, home dampness and mold, parental atopy.本研究采用两阶段分层分析方法，校正了年龄、性别、父母受教育程度、年收入、母乳喂养时长、胎龄、孕期母亲吸烟情况、环境烟草烟雾暴露、每月蟑螂记录情况、地毯铺设情况、宠物饲养情况、室内潮湿与霉变情况以及父母特应性体质等混杂因素。