近几十年来,许多地区哮喘发病呈高发趋势。本研究用前瞻性队列调查方法,研究非吸烟人群长期接触环境臭氧与哮喘发生之间的关系。对生活于美国加利福尼亚州的3091名27～87岁非吸烟人群随访15年。在追踪期间,测定肺功能,并通过问卷调查收集有关资料。哮喘根据医院医生诊断。同时 In recent decades, the incidence of asthma in many areas has been increasing. In this study, a prospective cohort study was conducted to investigate the relationship between long-term exposure to environmental ozone and the development of asthma in non-smokers. A total of 3091 non-smokers aged 27-87 living in California, USA, were followed up for 15 years. During follow-up, lung function was measured and data collected through questionnaires. Asthma is diagnosed by a hospital doctor. Simultaneously