Name
postbd_prebd_diff
Label
Post(FEV1%pred)-Pre(FEV1%pred)
Description
This variable is based on the ratio of the measured FEV1 difference from postbronchodilator and pre-bronchodilator exams over the Predicted FEV1 calculated prebronch (both values must be non-missing, and the post-bronchodilator spirometry examinations must be valid).
Type
numeric