The study is an observational multicenter descriptive study. It is planned to enroll approximately 1000 subjects with severe and very severe COPD hospitalized for the reason of COPD exacerbation into departments of pulmonology or therapy. The study will be conducted in approximately 20-25 institutions of treatment and prevention in Russian Federation and will include about 50 to 60 subject at each clinical site.~This is an observational study, so there is no treatment protocol or subjects' management recommendations required. The study subjects receive medical treatment according to the routine practice for their disease in Russian Federation. A subject's participation in this clinical study should not affect character and amount of care provided according to the routine clinical practice.~The study includes 5 clinical visits: Study Enrolment Visit, Month 3 Visit, Month 6 visit, Month 9 Visit, Month 12 visit / End of Study Visit.
The study is an observational multicenter descriptive study. It is planned to enroll approximately 1250 subjects with severe and very severe COPD hospitalized for the reason of COPD exacerbation into departments of pulmonology or therapy. The study will be conducted in approximately 20-25 institutions of treatment and prevention in Russian Federation and will include about 50 to 60 subject at each clinical site.