Fig. 2From: Identification and treatment of persistent small airway dysfunction in paediatric patients with asthma: a retrospective cohort studyROC curve analysis of FeNO200 or CaNO alone and in combination for predicting the diagnosis of asthma with p-SAD. FeNO200, fractional concentration of exhaled nitric oxide at a 200 mL/s flow rate; CaNO, concentration of nitric oxide of the alveolar or acinar regionBack to article page