Baseline FEV1 was defined as the average of the -45 min and -15 min FEV1 values taken on day 1 prior to the first dose of study medication. Trough FEV1 was defined as the mean of the post-dose 23 h 15 min and the 23 h 45 min FEV1 values. FEV1 was measured using central spirometry according to ATS/ERS standardization. Trough FEV1 was analyzed using a MIXED model for the full analysis set population. The model contained treatment as a fixed effect with the baseline FEV1 measurement, FEV1 prior to inhalation of short acting bronchodilator, FEV1 45 min post inhalation of short acting bronchodilator and baseline inhaled corticosteroids (ICS) use as covariates.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, participants analyzed had both baseline and week 12 values.

Dyspnea was measured at baseline using the Baseline Dyspnea Index (BDI) and during the treatment period using the TDI, which captures changes from baseline. The BDI and TDI each have three domains: functional impairment, magnitude of task and magnitude of effort, and each domain scored from -3 (major deterioration) to +3 (major improvement), giving an overall score of -9 to +9. A negative score indicates deterioration from baseline. A TDI focal score of 1 is considered to be a clinically significant improvement from baseline.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, for a given time frame, analyzed participants had values at both baseline and the corresponding time frame, i.e. week 12 or week 26.

The participant recorded the rescue medication taken in an electronic diary between visits and in the spirometry device during study visits. Daytime and nighttime rescue medication use (number of puffs) over 26 weeks was analyzed.

Full Analysis Set: The full analysis set included all randomized participants who received at least one dose of study medication.

Trough FEV1 was defined as the mean of the post-dose 23 h 15 min and the 23 h 45 min FEV1 values. This was measured using central spirometry according to ATS/ERS standardization. This was analyzed using the same MIXED model as specified for the primary analysis.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, for a given time frame, analyzed participants had values at both baseline and the corresponding time frame, i.e. day 1 or week 26.

FEV1 and FVC were measured using central spirometry according to ATS/ERS standardization. Both were analyzed using the same MIXED model as specified for the primary analysis.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, for a given time frame, analyzed participants had values at both baseline and the corresponding time frame, e.g. day 1, 5 min; day 1, 15 min, etc..

Peak FEV1 was defined as the maximum FEV1 0-4 h post-dose. Peak Fev1 was measured at 45min and 15min pre-dose and up to 4h post dose at day 1, week 12 and week 26, using central spirometry according to ATS/ERS standardization. It was analyzed using the same MIXED model as specified for the primary analysis.

The number of participants considered for the analysis was from a Serial Spirometry subgroup of the full analysis set where N = 134 and 58, respectively. However, analyzed participants had values at both baseline and the corresponding time frame, i.e. day 1, week 12 or week 26.

The standardized (with respect to time) AUC for FEV1 was calculated between 5 min and 4h post morning dose at day 1, week 12 and week 26. The AUC (5 min-4 h) for FEV1 at each visit was analyzed using the same MIXED model as specified for the primary analysis.

The number of participants considered for the analysis was from a Serial Spirometry subgroup of the full analysis set where N = 134 and 58, respectively. However, analyzed participants had values at both baseline and the corresponding time frame, i.e. day 1, week 12 or week 26.

In an electronic diary, the participant responded to 6 questions twice daily to report on the degree of symptoms over the past 12 hours of the morning and evening. The questions covered the participant's degree of overall symptoms, and degrees of individual symptoms of coughing, wheezing, amount of sputum, color of sputum and breathlessness. Each question scored from 0 to 3 where 0 represented no symptom present and 3 represented the worst degree of that symptom. A negative change in symptom score indicates improvement.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, for a given symptom category, analyzed participants had both baseline and week 26 values.

A COPD exacerbation was defined as a worsening of the following two or more major symptoms for at least 2 consecutive days:1) dyspnea; 2) sputum volume; 3) sputum purulence; or defined as a worsening of any 1 major symptom together with an increase in any 1 of the following minor symptoms for at least 2 consecutive days: 1) sore throat; 2) colds (nasal discharge and/or nasal congestion); 3) fever without other cause; 4) cough; 5) wheeze. COPD exacerbations were recorded in the patient diary and other source documents.

Full Analysis Set: The full analysis set included all randomized patients who received at least one dose of study medication.

COPD exacerbations were recorded in the patient diary and other source documents. The rate of COPD exacerbations during the 26 week treatment period was analyzed using a generalized linear model assuming a negative binomial distribution.

Full Analysis Set: The full analysis set included all randomized patients who received at least one dose of study medication.

SGRQ is a health related quality of life questionnaire consisting of 51 items in three components: symptoms, activity and impacts. The lowest possible score is zero and the highest possible score is 100. Higher scores correspond to greater impairment in quality of life. The health-related quality of life was measured using SGRQ. It was completed by the participant at the investigators site.

The number of participants considered for the analysis was from the full analysis set (randomized participants who received at least one dose of study medication). However, for a given time frame, analyzed participants had values at both baseline and the corresponding time frame, i.e. week 12 or week 26.