Dataset from A Randomised, Double-blind, Double-dummy, Placebo-controlled, Parallel Group Study to Assess the Efficacy and Safety of 48 Weeks of Once Daily Treatment of Orally Inhaled BI 1744 CL (5 µg [2 Actuations of 2.5 ug] and 10 ug [2 Actuations of 5 ug]) Delivered by the Respimat® Inhaler, and 48 Weeks of Twice Daily Foradil® (12 µg) Delivered by the Aerolizer® Inhaler, in Patients With Chronic Obstructive Pulmonary Disease (COPD)

The primary objective of this study is to assess the long-term efficacy and safety of once daily treatment of BI 1744 CL inhalation solution (5 and 10 mcg) delivered via the Respimat® inhaler, in patients with COPD.