Prospective Cohort Study for the Real - Life Effectiveness Evaluation of GlycOpyrronium With IndacatERol Combination in the Management of COPD in Canada (POWER Study)

Inclusion Criteria: * Patient diagnosed and treated for moderate to severe COPD according to the Global Initiative for Chronic Obstructive Lung Disease according to physician's assessment * Smoking history of \> 10 pack - years. * On-going treatment with tiotropium or fixed dose combination of LABA/ICS, specifically combinations fluticasone propionate/salmeterol for a minimum of three months but demonstrating persistence of symptoms indicating change of treatment to combination therapy \*\*using a CAT score \> 10. * Treatment with QVA149 is indicated as per the product monograph and appropriate for the patient as per the judgment of the treating physician. * Patient has signed informed consent agreeing to participate in the study and undergo the study treatments and allowing the use of their data for the purposes of the study. * Patient is expected to be available for 16 weeks after study enrolment * Assessed as per routine care or as documented in the patient's chart. \*\* As determined and decided by the treating physician prior to enrolment of the patient in the study. Exclusion Criteria: Patients fulfilling any of the following criteria are not eligible for inclusion in this study. No additional exclusions may be applied by the investigator, in order to ensure that the study population will be representative of all eligible patients. * Patients not willing to sign an informed consent. * Patient on maintenance treatment including triple therapy (LABA +LAMA+ICS) for COPD * Patients with a diagnosis of asthma or history of asthma. * Patients who have had two or more moderate to severe exacerbations during the last 12 months prior to study enrolment. A moderate COPD exacerbation is defined by requirement for treatment with systemic corticosteroids or antibiotics or both. A severe COPD exacerbation is defined by hospitalization, including an emergency room visit of longer than 24 h. * Patients who had an exacerbation within the previous 6 weeks to enrolment. * Patients who as per physician clinical judgment will require ICS treatment co-administered with QVA149 during the study period. * Patients with other chronic respiratory conditions that may affect the outcome of treatment including but not limited to lung cancer.