在儿童期的呼吸道症状与父母吸烟二者间存在关系的证据增多,但其机制尚不清楚。Colley等认为这种关系可能是在双亲及小儿之间存在对呼吸系统疾病的遗传敏感性的一种结果。他们生活在同一家庭环境,在家庭内交叉感染。Lebowitz等发现当喘息性支气管炎的症状在成人能控制时,双亲吸烟的习惯与小儿发生呼吸道症状之间的关系就不保持,Fergusson等认为母亲吸烟可刺激其子女的肺,并可促使下呼吸道感染扩散。作者相信在其日托托儿所中,对442个6～12个月龄的婴儿研究的结果和Fergusson的假设是一致的,作者访问了托儿所婴儿的全部母 There is increasing evidence of a relationship between childhood respiratory symptoms and parental smoking, but the mechanism is unclear. Colley and other that this relationship may be between parents and children there is a genetic susceptibility to respiratory diseases as a result. They live in the same family environment and cross-infection within the family. Lebowitz et al. Found that when the symptoms of asthmatic bronchitis are controlled in adults, the relationship between smoking habits of the parents and respiratory symptoms in infants does not persist. Fergusson et al. [3] argued that smoking from mothers stimulated their children’s lungs and promoted lower respiratory tract Spread of infection. The authors believe that the results of a study of 442 infants 6 to 12 months of age, consistent with Fergusson’s hypothesis, at their daycare nursery, were interviewed by the author on the entire mother of the nursery school