Efficacy and Safety of Different Doses of Indacaterol in Chronic Obstructive Pulmonary Disease (COPD)

Inclusion criteria: * Diagnosis of chronic obstructive pulmonary disease (COPD) (moderate-to-severe as classified by the Global Initiative for Chronic Obstructive Lung Disease \[GOLD\] Guidelines, 2008) and: 1. Smoking history of at least 10 pack-years 2. Post-bronchodilator forced expiratory volume in 1 second (FEV1) \< 80% and ≥ 30% of the predicted normal value 3. Post-bronchodilator FEV1/FVC (forced vital capacity) \< 70% Exclusion criteria: * Patients who have had a COPD exacerbation requiring systemic corticosteroids and/or antibiotics and/or hospitalization in the 6 weeks prior to screening * Patients who have had a respiratory tract infection within 6 weeks prior to screening * Patients with concomitant pulmonary disease * Patients with a history of asthma * Patients with diabetes Type I or uncontrolled diabetes Type II * Any patient with lung cancer or a history of lung cancer * Patients with a history of certain cardiovascular comorbid conditions Other protocol-defined inclusion/exclusion criteria applied to the study.