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
Visit Number vs Post(FEV1%pred)-Pre(FEV1%pred)
N Mean StdDev Median Min Max Unknown Total
Baseline 1,028 5.2 ± 6.6 4.7 -72.4 58.1 15,387 16,415
Sueño Ancillary - - - - - - - -
Gender vs Post(FEV1%pred)-Pre(FEV1%pred)
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 1,028 5.2 ± 6.6 4.7 -72.4 58.1 13,127 14,155
Female 500 5.5 ± 7.6 4.8 -72.4 58.1 7,858 8,358
Male 528 4.9 ± 5.5 4.7 -13.0 37.4 5,269 5,797