Chapter Opening

Chronic obstructive pulmonary disease (COPD) is expected to be the third cause of death worldwide by the year 2020, behind only cardiovascular disease and cerebrovascular disease (1), and the fifth leading cause of disability-adjusted life years lost (2). In the United States, COPD accounted for 8 million outpatient visits, 1.5 millions emergency department (ED) visits, 726,000 hospitalizations, and 119,000 deaths in 2000, with the number of women dying from COPD surpassing the number of men for the first time (3). In the United Kingdom, COPD exacerbations are now the most common cause of hospital admission (4). Acute exacerbations of COPD (AECOPD) account for a large proportion of the economic, medical, and psychosocial impact of this chronic disease and are often associated with physician visits, hospitalizations, medication prescriptions, functional decline, and mortality.

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