Fig. 3From: Bronchial thermoplasty reduces ventilation heterogeneity measured by multiple breath nitrogen washoutRelationship between change in lung clearance index (LCI) and change in asthma control questionnaire (ACQ) (n = 21). While the relationship between LCI and ACQ did not reach statistical significance (r = 0.41, p = 0.068), each patient who experienced an improvement (reduction) in LCI after BT also had a lower ACQBack to article page