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Table 2 Results of multiple linear regression analyses for 6 MWD, maximum exercise, quality of life, and shortness of breath.

From: Anxiety is associated with diminished exercise performance and quality of life in severe emphysema: a cross-sectional study

      

Model fit

 

B

SE

Beta

p

95% Confidence Interval for B

R 2

p

6MWD

       

   Age (years)

-2.37

.37

-.14

<.001

[-3.09, -1.65]

  

   Male Gender

45.04

4.78

.21

<.001

[35.67, 54.40]

  

   FEV1%

3.39

.33

.25

<.001

[2.75, 4.03]

  

   DLCO%

2.61

.23

.25

<.001

[2.15, 3.06]

  

   Depression-M

.26

.79

.01

.746

[-1.30, 1.81]

  

   Depression-P

-2.64

.85

-.08

.002

[-4.31, -.97]

  

   Anxiety

-.99

.24

-.10

<.001

[-1.45, -.52]

.22

<.001

Max. exercise

       

   Age (years)

-.62

.07

-.18

<.001

[-.75, -.49]

  

   Male Gender

20.44

.85

.45

<.001

[18.77, 22.11]

  

   FEV1%

1.14

.06

.40

<.001

[1.03, 1.26]

  

   DLCO%

.50

.04

.23

<.001

[.42, .58]

  

   Depression-M

.21

.14

.03

.142

[-.07, .49]

  

   Depression-P

-.73

.15

-.11

<.001

[-1.02, -.43]

  

   Anxiety

-.10

.04

-.05

.017

[-.19, -.02]

.43

<.001

Quality of life

       

   Age (years)

-.26

.04

-.13

<.001

[-.35, -.18]

  

   Male Gender

1.18

.56

.04

.037

[.07, 2.29]

  

   FEV1%

-.10

.04

-.06

.012

[-.17, -.02]

  

   DLCO%

-.07

.03

-.05

.018

[.-12, -.01]

  

   Depression-M

.31

.09

.09

.001

[.12, .49]

  

   Depression-P

1.34

.10

.33

<.001

[1.15, 1.54]

  

   Anxiety

.187

.03

.16

<.001

[.13, .24]

.28

<.001

Shortness of Breath

       

   Age (years)

-.132

.07

-.04

.045

[-.26, -.01]

  

   Male Gender

-2.940

.85

-.07

.001

[-4.61, -1.27]

  

   FEV1%

-.345

.06

-.14

<.001

[-.46, -.23]

  

   DLCO%

-.285

.04

-.15

<.001

[-.37, -.20]

  

   Depression-M

.139

.14

.03

.331

[-.14, .42]

  

   Depression-P

1.836

.15

.30

<.001

[1.54, 2.13]

  

   Anxiety

.206

.04

.12

<.001

[.12, .29]

.24

<.001

  1. Unstandardized regression coefficients (B), standard errors (SE), standardized coefficients (Beta), significance values (p), and 95% confidence intervals are shown for each independent variable. Goodness-of-fit (R2) shown for each regression model. For each regression model, BDI depression was entered either as total score or as two separate independent variables composed of the mood (Depression-M) or physical (Depression-P) BDI symptom items.
  2. FEV1%: forced expiratory volume in 1 second, percent of predicted.
  3. DLCO%: single-breath diffusing capacity of carbon monoxide, percent of predicted.
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Respiratory Research

ISSN: 1465-993X

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