Beta  p-value  r2
Age 0.07 0.07 25%
Gende r (male) -0.34 0.0001  
Smoking pack/year Income 0.03 0.4
 Education 0.08 0.04
FEV1/FVC -0.01 0.7
Anxiety 0.27 0.0001
  0.06 0.1
Table 4: Perception of dyspnea in all subjects.