Reactance inversion in moderate to severe persistent asthma: low birth weight, prematurity effect, and bronchodilator response.

Introduction: Reactance inversion (RI) has been associated with impaired peripheral airway function in persistent asthma. However, there is little to no data about the difference between asthmatic children with and without RI. This study aimed to detect clinical and lung function differences in moderate-severe asthmatic children with and without RI.