Fig. 4

Comparison of mMRC, 6MWT and CAT scores between the two groups of patients. A Change from baseline in mMRC over 12 months; B change from baseline in 6MWT ove12 months; C change from baseline in CAT cores over 12 months. Mean values are shown for all subjects for whom data were available at the given timepoints, error bars are 95% CI. *P < 0.05 compared with the baseline, ^ΔP < 0.05 compared with the control group (P < 0.05). mMRC modified Medical Research Council, 6MWT 6-min walk test, CAT COPD assessment test