Name
airflow_limitation
Label
Airflow Limitation (pre FEV1/FVC<70 only)
Description

This variable is based on the empirical evidence from the spirometry that the ratio of FEV1 to FVC is below the level defined by the ATS as indicative of restricted airflow. Defined only for valid spirometries.

Domain
noyes01
  • 0: No
  • 1: Yes
Type
choices
Airflow Limitation (pre FEV1/FVC<70 only) vs Visit Number
Baseline Sueño Ancillary
Total 16,415 -
No 12,402 -
Yes 938 -
Unknown 3,075 -
Airflow Limitation (pre FEV1/FVC<70 only) vs Gender
Baseline
Female Male Total
Total 8,358 5,797 14,155
No 7,439 4,963 12,402
Yes 412 526 938
Unknown 507 308 815