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作者运用随机双盲交叉实验方法对硝苯吡啶预防支气管哮喘发作的疗效进行了随防观察。临床资料对象:本文选取了40名支气管哮喘病人,男25例,女15例,年龄22～55岁,平均年龄35.4岁。实验方法;本实验方法共3年,分三个阶段,每个阶段一年(为摒除季节,气候等诱发支气管哮喘发作的因素)。第一阶段所有病人都以单盲的方式接受安慰剂(vitQ0.1ad),然后随机地分为A、
The authors used a randomized double-blind crossover experiment to monitor the efficacy of nifedipine in preventing bronchial asthma attacks. Clinical data object: This article selected 40 patients with bronchial asthma, 25 males and 15 females, aged 22 to 55 years, mean age 35.4 years old. Experimental methods; The experimental method for a total of three years, divided into three stages, each stage of a year (to exclude seasonal, climatic and other factors that trigger the onset of bronchial asthma). All patients in the first phase received a placebo (vitQ0.1ad) in a single blind fashion and then randomly divided into A,