Effect of age on exercise-induced bronchoconstriction in children and adolescents with asthma.

Objective: The relationship between exercise-induced bronchoconstriction (EIB) and exertional dyspnea in children and adolescents is yet to be fully established. This study examined whether indicators of fractional exhaled nitric oxide (FeNO), forced expiratory volume in 1 s (FEV) percent predicted at baseline, and dyspnea are useful for predicting children and adolescents with EIB.

Methods: We enrolled 184 children and adolescents diagnosed with asthma (mean age 11.