<qa>  What is the name of the cohort that will acquire data in a community-based cohort?This study will acquire data in a community-based cohort in which patients with COPD will be classified into GOLD risk groups A-D at enrollment and followed longitudinally. This study will assess the frequency of change in GOLD risk group during 5 years of follow-up, look at the use of COPD medications this cohort and how provider-selected therapy for COPD compares to GOLD-recommended pharmacologic therapy thus addressing a critical knowledge gap in the scientific community. 