Prospective Multicenter Dynamic Cohort Study to Evaluate Phenotypic Profiles of Subjects With Chronic Obstructive Pulmonary Disease (COPD-BPCO 2 Study)

COPD is a heterogeneous disease, and patient characteristics may be associated with prognosis and treatment response. The previous Initiative BPCO cohort recruited 1,720 subjects between 2005 and 2018 and identified clinically relevant COPD phenotypes, including subgroups associated with mortality risk. Because diagnostic strategies, risk factors, comorbidity management, and COPD treatments have evolved, this new prospective dynamic cohort will assess whether current COPD phenotypes differ from those previously identified and whether classification and regression tree (CART) algorithms developed in the previous cohort remain applicable. Data will be collected during routine care from hospital pulmonology centers in France. Baseline and follow-up data may include demographics, risk factors, comorbidities, usual treatments, patient-reported questionnaires, pulmonary function, arterial blood gases, 6-minute walk test, imaging, biology results, exacerbations, and mortality status.