COPD by BD Test (for all valid PRE_BD)
This variable is based on the post-bronchodilator measurement of the FEV1 to FVC ratio. The airflow remains restricted after the administration of albuterol. This variable is also defined for all participants who did not conduct a post-spirometry exam. Defined only for valid spirometries.
- 0: No
- 1: Yes
COPD by BD Test (for all valid PRE_BD) vs Visit Number
COPD by BD Test (for all valid PRE_BD) vs Gender