Conditions: Chronic Obstructive Pulmonary Disease (COPD)
Keywords: COPD, bronchodilator, long acting beta agonist, LABA
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 96
Healthy volunteers: no

Brief summary:
This study was conducted to provide detailed information on the efficacy of indacaterol (in terms of the spirometry assessment forced expiratory volume in 1 second \[FEV1\]) over the full 24-h time period

Detailed description:

Arms:
arm 1: In period I, indacaterol 300 μg once a day in the morning delivered via single dose dry powder inhaler (SDDPI) with a placebo to salmeterol delivered via dry powder inhaler (DPI). Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period II, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. In period III, Salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and second dose in the evening along with placebo matching indacaterol delivered by SDDPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 2: In period I, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. In period II, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period III, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 3: In period I, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose was in the evening along with placebo matching indacaterol delivered by SDDPI. In period II, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period III, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 4: In period I, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period II, salmeterol 50 μg twice daily delivered via dry powder inhaler (DPI). One of the two daily doses of salmeterol was administered in the morning and the second dose was in the evening along with placebo matching indacaterol delivered by SDDPI. In period III, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via dry DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 5: In period I, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period II, During morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period III, Patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 6: In period I, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. In period II, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. In period III, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 7: In period I, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. In period II, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. In period III, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 8: In period I, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period II, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via dry powder inhaler DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period III, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 9: In period I, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period II, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. In period III, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 10: In period I, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via dry powder inhaler DPI. In period II, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period III, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 11: In period I, salmeterol 50 μg twice daily delivered via DPI. One of the two daily doses of salmeterol was administered in the morning and the second dose in evening along with placebo matching indacaterol delivered by SDDPI. In period II, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. In period III, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study. arm 12: In period, during morning and evening, placebo matching indacaterol was delivered via SDDPI and placebo matching salmeterol was delivered via DPI. In period II, patients were instructed to take morning doses of a placebo to indacaterol delivered via SDDPI and placebo to salmeterol delivered via DPI. Indacaterol 300 μg once a day in the evening delivered via SDDPI with placebo to salmeterol delivered via DPI. In period III, indacaterol 300 μg once a day in the morning delivered via SDDPI with a placebo to salmeterol delivered via DPI. Patients were also instructed to take evening doses of a placebo to indacaterol via SDDPI and placebo to salmeterol via DPI. Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) was available for rescue use throughout the study.

Interventions: intervention 1: Indacaterol intervention 2: Salmeterol intervention 3: Placebo to Indacaterol intervention 4: Placebo to Salmeterol
Intervention descriptions: intervention 1: 300 µg dosed in the morning/evening via single dose dry powder inhaler (SDDPI) intervention 2: 50 µg twice daily delivered via dry powder inhaler (DPI) intervention 3: Placebo matching indacaterol was delivered via SDDPI. intervention 4: Placebo matching salmeterol was delivered via DPI

Protocol document: