Fig. 4From: Hydrogen/oxygen therapy for the treatment of an acute exacerbation of chronic obstructive pulmonary disease: results of a multicenter, randomized, double-blind, parallel-group controlled trialChanges from baseline in CAT score in in FAS (a) and PPS (b) population. CAT Cough Assessment Test, FAS full analysis set, PPS per-protocol set. ***p < 0.001Back to article page