[Epidemiology of chronic obstructive pulmonary disease].

COPD is responsible of morbidity, mortality and health costs. Projection in 2020 is State of COPD as the 3rd cause of global mortality (6th in 1990); 5th issue of years lost early death or disability (disability-adjusted life years, DALYs) [12th in 1990].Active smoking remains the main risk factor, but other factors are better known as professional factors, infections, the role of air pollution. The prevalence of COPD varies by country, age and sex. This condition is also associated with significant Comorbidities. Major challenge for the next few years is based on the prevention of smoking and the early detection of the disease in general population early.