Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the U.S.—but what are the risk factors or probable causes for developing this lung disease? According to COPDFoundation.org, there are three main risk factors for developing COPD.
Smoking is the number one cause of COPD and although not all people who develop the disease have a history of smoking, 90 percent of people diagnosed do.
COPD is usually diagnosed in people over the age of 40 who either still smoke or have in the past.
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