If we have only spirometry as asthma assessment tool in the pediatric practice

Background NICE guidelines from 2015 define forced expiratory volume in 1 s/forced vital capacity (FEV1/FVC) ratio of less than 70% as a positive test for obstructive airway disease (obstructive spirometry). The bronchodilator response (BDR) in children with FEV1 improvement of 12% or more is postulated as a positive for asthma test. …