title: Factors influencing the course of COPD.
mesh_terms: D000138:Acidosis / Q000150:complications; D000328:Adult; D000367:Age Factors; D000368:Aged; D000740:Anemia / Q000150:complications; D001980:Bronchi / Q000473:pathology; D001991:Bronchitis / Q000401:mortality; D006801:Humans; D006935:Hypercapnia / Q000150:complications; D000860:Hypoxia / Q000150:complications; D007239:Infections / Q000150:complications; D008173:Lung Diseases, Obstructive / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D009203:Myocardial Infarction / Q000401:mortality; D009765:Obesity / Q000150:complications; D011446:Prospective Studies; D011656:Pulmonary Emphysema; D011859:Radiography; D012131:Respiratory Insufficiency / Q000209:etiology / Q000401:mortality*; D012907:Smoking / Q000150:complications; D014652:Vascular Diseases / Q000150:complications