Fig. 1From: A retrospective study of clinical features of cough variant asthma in Chinese adultsCorrelation between sputum eosinophil% and PD20-FEV1 in CVA patients (a) or in CA patients (b). Correlation between sputum eosinophil% and the improvement rate in FEV1 after inhalation of bronchodilator in CA patients (c)Back to article page