由于缺乏特异性诊断指标,哮喘病例定义和诊断一直是流行病学研究中的难题[1～3]。一般来说,人群中哮喘病例不能得到及时或正确的诊断是临床比较普遍的现象,即便在医疗保险和医疗条件较发达国家也是如此[4,5]。哮喘的流行病学研究多具有覆盖人群广、调查范围大、应答率要求高等 Due to the lack of specific diagnostic indicators, the definition and diagnosis of asthma cases has been a difficult problem in epidemiological studies [1-3]. In general, the failure to obtain timely or correct diagnosis of asthma in the population is a clinically common phenomenon, even in more developed countries with medical insurance and medical conditions [4,5]. Epidemiological studies of asthma mostly have a broad coverage of the population, the scope of the investigation, higher response rates