Ever-smokers# | Never-smokers | |||
β-coefficient | p-value | β-coefficient | p-value | |
Post-BD FEV1 % pred | 0.3940 | <0.001 | ||
Post-BD FVC % pred | 0.3323 | 0.02 | ||
Log fraction < -950 Hounsfield units | -0.0423 | 0.001 | ||
% Sputum neutrophils | -0.1967 | 0.03 | ||
% Sputum lymphocytes square root | 0.9407 | 0.009 |
FEV1: forced expiratory volume in 1 s; BD: bronchodilator; FVC: forced vital capacity. #: body mass index, pack-years smoking and cocaine use were considered for model construction.