The Clinical Chronic Obstructive Pulmonary disease (COPD) Questionnaire (CCQ) is a self-administered questionnaire containing ten questions, divided into three domains: symptoms, mental and functional state. The questions are based on a 7-point scale where a '0' means having no limitations and a '6' means extreme or complete limitations. The final score is the mean of all ten questions. The CCQ score was recalculated according to the paper by Van der Molen et al., 2003. The statistical significance remained the same.

Forced Expiratory Volume in one second (FEV1) was calculated as the volume of air forcibly exhaled in one second as measured by a spirometer. FEV1 was normalized by 12 hours (divided by time). This outcome measures absolute values at week 26. Results are obtained from linear mixed model.

Spirometry was performed according to internationally accepted standards. Trough FEV1 was defined as the mean of the 23 hour 15 minute and 23 hour 45 minute post-dose values. A mixed model was used with treatment as a fixed effect with baseline FEV1 and FEV1 prior to inhalation and FEV1 60 minutes post inhalation of two short acting bronchodilators (components of reversibility at Day -14) as covariates. The model also included baseline smoking status (current/ex-smoker), baseline ICS use (Yes/No) and region as fixed effects with center nested within region as a random effect.

FEV1 was measured with spirometry conducted according to internationally accepted standards. Trough FEV1 was defined as the mean of FEV1 measurements at 23 h 10 min and 23 h 45 min post Day 14 dose measured on the morning of Day 15 in each treatment period. The model used for analysis contained the (period) baseline FEV1 as covariate. The (period) baseline FEV1 was defined as the value measured before the study drug administration in that treatment period.

Trough FEV1 was assessed by performing spirometry measurements in the clinic for each treatment period. For the primary efficacy variable, trough FEV1 is the mean of two measurements taken at 23h 10 min and 23h 45 min post dose. The primary variable was analyzed using an analysis of covariance (ANCOVA) model with the (period) baseline FEV1 as covariate. The (period) baseline FEV1 was defined as the value measured before the study drug administration in that treatment period.

Spirometry testing was performed in accordance with American Thoracic Society standards. Trough FEV1 was defined as the average of the 23 hour 15 minute and 23 hour 45 minute measurements post dosing. Baseline FEV1 is the mean of the 45 minute and 15 minute pre-dose FEV1 values at day 1 of each period. Least square means are based on the Analysis of Covariance Trough FEV1 at day 7 = sequence effect + patient(sequence) + period effect + treatment effect + (period) baseline FEV1 + error.

Heart rate was assessed by Holter monitoring and was measured over a 24 hour period at day 14. Heart rate was defined as the average value over the 24 hour monitoring period. The baseline measurement was the average heart rate taken from the 24 hour Holter monitoring period performed at screening or the last 24-hour period before taking the first dose of study drug. Least square means are based on the analysis of covariance: 24 hours mean heart rate = center + treatment + baseline value + Forced Expiratory Volume in one second (FEV1) before inhalation of salbutamol/albuterol + FEV1 30 min post salbutamol/albuterol + error.