RESULTS: The present study included a total of 52 patients whose 29 (55.8%) completing PR program. There was no statistically significant difference in age, sex, presence of co-morbidities, smoking, and numbers of hospitalization and exacerbations of COPD during the last one year between the groups completing and not completing the PR program. Those not participating in the PR program had smoked for longer time, their 6-minutes walking distance was shorter, and mMRC value was poorer (p=0.038). Furthermore, their BODE index score was higher. There wasn’t, however, statistically significant difference in this parameter.