Fig. 2From: Randomised trial of once-daily vilanterol in children with asthma on inhaled corticosteroid therapyLS mean change from baseline in evening PEF averaged over Weeks 1 to 4 (ITT population). Abbreviations: ITT, intention-to-treat; LS, least squares; PEF, peak expiratory flow; SE, standard error, VI, vilanterolBack to article page