Fig. 2From: Maintained therapeutic effect of revefenacin over 52 weeks in moderate to very severe Chronic Obstructive Pulmonary Disease (COPD)Day 365 trough FEV1 by patient subgroup. CI, confidence interval; FEV1, forced expiratory volume in 1 s; ICS, inhaled corticosteroid; LS, least squares; REV, revefenacin; TIO, tiotropiumBack to article page