B | Beta | p‐value | |
COPD | 1.22 | 0.03 | 0.40 |
Asthma | 13.91 | 0.18 | ** |
% FEV1 over pred | −0.13 | −0.21 | ** |
Interaction of COPD and % FEV1 over pred | −0.19 | −0.11 | ** |
Smoking behaviour | |||
Never smoker | |||
Former smoker | −0.08 | 0.00 | 0.91 |
Smoker≤20 pack-yrs | 2.60 | 0.09 | ** |
Smoker>20 pack-yrs | 2.36 | 0.08 | 0.02 |
Sex | 1.7 | 0.10 | ** |
Age# | 0.1 | 0.11 | ** |
Education | 1.4 | 0.08 | 0.02 |
Interaction of age and asthma | 1.2 | 0.13 | ** |
Constant | 5.0 | ** |
B: non standardized coefficient
Beta: standardized coefficient
COPD: chronic obstructive pulmonary disease
% FEV1 over pred: % force expiratory volume in one second over predicted n=862
#: age-centred
Coefficient of determination: (R2)=0.19 (adjusted R2=0.18)
**: p<0.01