Dataset from Randomised, Double-blind, Placebo-controlled, Parallel Group Study to Assess the Efficacy and Safety of 4 Weeks of Once Daily Treatment of Orally Inhaled BI 1744 CL Delivered by the Respimat Inhaler in Japanese Patients With COPD

The primary objective of this study is to determine the optimum dose(s) of BI 1744 CL inhalation solution delivered by the Respimat inhaler once daily for 4 weeks in Japanese patients with chronic obstructive pulmonary disease (COPD). The selection of the optimum dose(s) will be based on bronchodilator efficacy, safety evaluations and pharmacokinetic evaluations.