Fig. 1From: Validity of fractional exhaled nitric oxide and small airway lung function measured by IOS in the diagnosis of cough variant asthma in preschool children with chronic coughComparison of FeNO and IOS small airway function indices between CVA group and nCVA group. a Comparison of R5 between CVA group and nCVA group. b Comparison of FeNO between CVA group and nCVA group. c Comparison of R20 between CVA group and nCVA group. d Comparison of Z5 between CVA group and nCVA group. e Comparison of X5 between CVA group and nCVA group. f Comparison of Fres between CVA group and nCVA groupBack to article page