Fig. 3
From: Umeclidinium/vilanterol versus fluticasone propionate/salmeterol in COPD: a randomised trial
Change from baseline in trough FEV1 (L) (ITT population). Data are least squares mean (95 % CI) differences of change from baseline in trough FEV1 (L) at Days 28, 56, 84 and 85. 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, vilanterol