Fig. 2From: Umeclidinium/vilanterol versus fluticasone propionate/salmeterol in COPD: a randomised trialChange from baseline in FEV1 (L) over 0–24 h on Day 84 (ITT population). Data are least squares mean (95 % CI) change from baseline. Abbreviations: CI, confidence interval; FEV1, forced expiratory volume in 1 s; ITT, intent-to-treat; LS, least squares; FP/SAL, fluticasone propionate/salmeterol; UMEC, umeclidinium; VI, vilanterolBack to article page