Methods: The bronchial provocation test was performed to assess the bronchial reactivity by inhaling methacholine in 165 patients with chronic cough.

• 方法:慢性咳嗽为主要表现患者165例,其中疑诊咳嗽变异性哮喘患者89例;吸入乙酰甲胆碱做支气管激发试验,检测其气道高反应性。