Fig. 5From: Efficacy of umeclidinium/vilanterol according to the degree of reversibility of airflow limitation at screening: a post hoc analysis of the EMAX trialImprovement in rescue medication use (puffs/day) across Weeks 1−24. Vertical dotted lines indicate quintiles of reversibility at baseline. CI, confidence interval; FEV1, forced expiratory volume in 1 s; FP, fractional polynomial; LS, least squares; SAL, salmeterol; UMEC, umeclidinium; VI, vilanterolBack to article page