To determine the prevalence and analyze the most relevant clinical characteristics of three clinical phenotypes of COPD, emphysema, chronic bronchitis or COPD-asthma. Observational, multicenter study performed with COPD patients recruited in pulmonology outpatient services. The stratification in three phenotypes was performed with
Imaging tests, pulmonary function, and a standardized clinical questionnaire. The presented an emphysematous phenotype, were chronic bronchi tic and the other presented a phenotype showing mixed characteristics with asthma. There were no significant differences in the smoking level, in the geometric values or time of disease evolution.
