Danish Quality Assurance Project on Diagnosis and Treatment of Chronic Obstructive Pulmonary Disease (COPD) in Outpatient Lung Clinics

Inclusion Criteria:

• Outpatient with the diagnosis or referral diagnosis of COPD.
• COPD must be the primary reason for this outpatient contact (for both new patients and controls).

Exclusion Criteria:

• Any co-morbidity that hampers the diagnosis and treatment of COPD in accordance with the COPD guidelines used locally (e.g. malignant disease, dementia or sequelae of apoplexy).
• Asthma without the presence of COPD