The worldwide epidemiology of chronic obstructive pulmonary disease

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Abstract
Chronic obstructive pulmonary disease (COPD) is common and increasing in prevalence in North America and other industrialized areas. The worldwide epidemiology is multifactorial and complex. Smoking is by far the most important and correctable risk factor. Heredity and environmental risks also relate to the pathogenesis of COPD. Early stages of COPD can only be identified by spirometry. Smoking cessation can retard the progress of the disease and improve prognosis. Reduction or elimination of environmental risks may also be helpful.

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