Dataset from A Randomized, Double-blind, Double-dummy, Parallel Group Trial Comparing 12 Weeks Treatment With Tiotropium Inhalation Capsules 18 mcg Via the HandiHaler® Once Daily to Combivent® Inhalation Aerosol CFC MDI 2 Actuations q.i.d. in COPD Patients Currently Prescribed Combivent® Inhalation Aerosol CFC MDI

The objective of this study is to evaluate the efficacy and safety of 12 weeks treatment with tiotro pium HandiHaler® 18 mcg daily compared to Combivent® MDI CFC Inhalation Aerosol 2 actuations qid in COPD patients currently prescribed Combivent® MDI.