Primary care respiratory journal : journal of the General Practice Airways Group
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Randomized Controlled Trial Multicenter Study
Bronchodilator efficacy of tiotropium in patients with mild to moderate COPD.
Evaluation of tiotropium efficacy in patients with mild chronic obstructive pulmonary disease (COPD) defined by the 2003 Swedish Society of Respiratory Medicine guidelines (post-bronchodilator FEV1/FVC <70%; FEV1 >60% predicted). ⋯ Compared with placebo, tiotropium improved lung function in patients with mild COPD.