A Randomised, Double-blind, Placebo- and Active-controlled Parallel Group Study to Assess the Efficacy of 12 Weeks of Once Daily Treatment of Two Doses of Orally Inhaled Tiotropium+ Olodaterol Fixed Dose Combination (Delivered by the Respimat Inhaler) in Patients With Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD)

FEV1 AUC0-3h Response

Time Frame: baseline and 12 weeks

Forced expiratory volume in one second (FEV1) Area under the curve (AUC) 0-3h was calculated as the area under the FEV1-time curve from 0 to 3h post-dose using the trapezoidal rule, divided by the duration (3h) to report in litres. FEV1 AUC0-3h response was defined as FEV1 AUC0-3h minus baseline FEV1. The adjusted mean and standard error (SE) are obtained from fitting a mixed effect model repeated measures (MMRM) including fixed effects of treatment, planned test day, treatment by test day interaction, baseline, and baseline by test day interaction; patient as a random effect; spatial power covariance structure for within-patient errors and Kenward-Roger approximation of denominator degrees of freedom.

Trough FEV1 Response (Change From Baseline)

Time Frame: baseline and 12 weeks

Trough FEV1 was defined as the FEV1 value at the end of the dosing interval (24 hours). It was calculated as the mean of the 2 FEV1 measurements performed 23 h and at 23 h 50 min after inhalation of study medication at day 85. Trough FEV1 response was defines as trough FEV1 minus baseline FEV1. The adjusted mean (SE) are obtained from fitting a mixed effect model repeated measures (MMRM) including fixed effects of treatment, planned test day, treatment by test day interaction, baseline, and baseline by test day interaction; patient as a random effect; spatial power covariance structure for within-patient errors and Kenward-Roger approximation of denominator degrees of freedom.

St. George's Respiratory Questionnaire (SGRQ) Total Score Based on Data From This Individual Study

Time Frame: 12 weeks treatment

The SGRQ ranges from 0 (no impairment of quality of life) to 100 (highest impairment of quality of life). The adjusted mean (SE) are obtained from fitting a mixed effect model repeated measures (MMRM) including fixed effects of treatment, planned test day, treatment by test day interaction, baseline, and baseline by test day interaction; patient as a random effect; spatial power covariance structure for within-patient errors and Kenward-Roger approximation of denominator degrees of freedom.

St. George's Respiratory Questionnaire (SGRQ) Total Score Based on Combined Dataset From This Study and the Replicate Study NCT01964352

Time Frame: 12 weeks treatment

This endpoint was evaluated after combining the data from this and the replicate study NCT01964352 as specified in the analysis plan. The SGRQ ranges from 0 (no impairment of quality of life) to 100 (highest impairment of quality of life). The adjusted mean (SE) are obtained from fitting a mixed effect model repeated measures (MMRM) including fixed effects of treatment, planned test day, treatment by test day interaction, baseline, and baseline by test day interaction; patient as a random effect; spatial power covariance structure for within-patient errors and Kenward-Roger approximation of denominator degrees of freedom.