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Table 6 Linear regression models showing association between dyspnea ratings and other variables

From: Supplemental oxygen users with pulmonary fibrosis perceive greater dyspnea than oxygen non-users

  Model 1 Model 2 Model 3 Model 4 Model 5
Intercept 2.50 ± 0.10 3.31 ± 0.26 3.24 ± 0.27 5.37 ± 0.31 1.96 ± 0.36
<0.0001 <0.0001 <0.0001 <0.0001 <0.0001
Used O2 0.77 ± 0.11 0.66 ± 0.12 0.68 ± 0.12 0.42 ± 0.13 0.54 ± 0.12
<0.0001 <0.0001 <0.0001 0.001 <0.0001
BMI      0.05 ± 0.01
<0.0001
SpO2 drop 0.07 ± 0.01 0.06 ± 0.01 0.06 ± 0.01   0.06 ± 0.01
<0.0001 <0.0001 <0.0001   <0.0001
FVC%   −0.01 ± 0.003 −0.01 ± 0.003 −0.01 ± 0.0002 −0.01 ± 0.002
  0.001 0.001 0.008 <0.0001
6MWD     −0.001 ± 0.002  
    <0.0001  
HR rise    0.003 ± 0.004   
   0.43   
R-square 0.09 0.09 0.09 0.11 0.11
  1. Values are coefficients and standard error (top) and p value (bottom); 6MWD distance walked during six-minute walk test (6MWT), O2 completed 6MWT using supplemental oxygen, No O2 completed 6MWT without using supplemental oxygen, HR heart rate, SpO2 peripheral oxygen saturation