title: Assessing the severity of COPD.
authors.forename: David M G
authors.initials: DM
authors.lastname: Halpin
mesh_terms: D015992:Body Mass Index; D004417:Dyspnea / Q000209:etiology / Q000503:physiopathology*; D005541:Forced Expiratory Volume; D006801:Humans; D009752:Nutritional Status; D011320:Primary Health Care; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology*; D012307:Risk Factors; D012720:Severity of Illness Index; D014797:Vital Capacity