Here sinonasal, pulmonary and generic health related quality of life will be studied in a group of patients with COPD versus a control group. The severity of nasal airway obstruction will be linked to the the severity of pulmonary airway obstruction. Assessment of pathological changes in the nose with nasal endoscopy, as well as performing a nasal cytological brushing for the identification of nasal inflammatory responses in the nose, will be conducted in both the control and study group.