支气管哮喘(简称哮喘)是最常见的慢性呼吸道疾病之一,不仅严重影响个人健康,而且造成了巨大的社会负担。已有足够证据表明在许多国家或地区哮喘的患病率呈上升趋势,特别是近20年来哮喘的发病率和病死率也有增加的趋势。现有的哮喘患病率资料主要来自发达国家,目前我国哮喘大规模的流行病学资料尚属空白,特别是对相关危险因素的调查分析,对国家制定相应的防治计划具有重要的指导意义。一、流行病学哮喘是常见的慢性呼吸道疾病之一。近年来哮喘患病率在全世界范围内较前有明显增加。综合世界各地的哮喘患病率流行病学调查结果发现,儿童哮喘患病率在3.3%～ Bronchial asthma (referred to as asthma) is one of the most common chronic respiratory diseases, not only seriously affect personal health, but also caused a huge social burden. There is sufficient evidence that the prevalence of asthma is on the rise in many countries or regions, especially the incidence and mortality of asthma in the past 20 years. The existing prevalence of asthma data mainly comes from developed countries. At present, the large-scale epidemiological data of asthma in our country is still blank. In particular, the investigation and analysis of relevant risk factors is of great guiding significance for the state to formulate the corresponding prevention and control plan. First, epidemiology Asthma is one of the common chronic respiratory diseases. In recent years, the prevalence of asthma in the world has significantly increased compared with the previous. Comprehensive around the world prevalence of asthma epidemiological survey found that the prevalence of asthma in children in 3.3% ~