TABLE 1

Is chronic obstructive pulmonary disease (COPD) or bronchiectasis the primary diagnosis?

COPDBronchiectasis
History of respiratory exposure, typically to tobacco smokeNecessary#Not necessary
Fixed airflow obstructionNecessaryNot necessary
Airway wall abnormality at CTNot necessaryNecessary

  • CT: computed tomography. #: except α1-antitrypsin deficiency.