Primary care COPD patients compared with large pharmaceutically-sponsored COPD studies: an UNLOCK validation study.
BackgroundGuideline recommendations for chronic obstructive pulmonary disease (COPD) are based on the results of large pharmaceutically-sponsored COPD studies (LPCS).There is a paucity of data on disease characteristics at the primary care level, while the majority of COPD patients are treated in primary care.ObjectiveWe aimed to evaluate the exter