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Q:How long does it take smokers to experience symptoms of COPD?
A:People usually experience COPD symptoms after smoking for more than 20 years. Most people with COPD have smoked at least 10 to 20 cigarettes per day for 20 or more years before experiencing any symptoms. Thus, COPD is typically not diagnosed until the fifth decade of life (in people aged 40 to 49 years).
Q:Out of 100 smokers, how many will likely develop COPD?
A:15. Out of 100 smokers, about 15 of them will develop COPD. Cigarette smoking and tobacco use account for as much as 90% of the risk for the development of COPD.
Eric G. Honig, Roland H. Ingram, Jr. Chronic bronchitis, emphysema, and airways obstruction, in Harrison’s Principles of Internal Medicine, 15th edition, Braunwald, Fauci, Kasper, Hauser, Longo, Jameson (eds). McGrawHill, 2001
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