期刊
BMJ OPEN
卷 6, 期 2, 页码 -出版社
BMJ PUBLISHING GROUP
DOI: 10.1136/bmjopen-2015-010410
关键词
-
资金
- Ministry of the Environment Government of Japan
- Grants-in-Aid for Scientific Research [15H04790, 25670327] Funding Source: KAKEN
Objectives: There has been little study on the effect of traffic-related air pollution on the incidence and persistence of asthma in preschool children. We evaluated the association of exposure to traffic-related air pollution with the incidence/persistence of asthma during the first 3 years of life using a population-based study. Methods: A baseline survey was conducted in 1 1/2 year-old children (n=63 266). A follow-up survey at 3 years of age (n=43 343) identified new-onset asthma cases (n=853) and persistence of asthma (n=214). In the prevalence/persistence study, the outdoor concentrations of nitrogen oxides (NOx) and elemental carbon (EC) at home during the first 1 1/2 years of life were estimated by a dispersion model. In the nested case-control study, which regarded incidence of asthma as cases, the personal exposure levels were estimated by dispersion model including time-activity pattern. Results: There was no statistically significant association between the incidence of asthma between age 1 1/2 and 3 years and personal exposure levels to NOx nor EC. However, the persistence of asthmatic symptoms (between 1 1/2 and 3 years) was significantly associated with outdoor concentrations of NOx. ORs for the persistence of asthmatic symptoms were 6.02 (95% CI 1.51 to 23.92) for the comparison between the upper 5th and lower 25th centiles of NOx. Conclusions: While no statistically significant association was observed for the incidence of asthma, the persistence of asthmatic symptoms in preschool children was significantly associated with traffic-related air pollution. This supports its importance as a risk factor in childhood airway disease.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据