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Table 4 Bivariate relationships (Pearson’s r) and multivariate linear regression analysis (standardized beta coefficients) using change in personal variables to predict SF-12 physical and mental health scores at two-year follow-up (N = 59)

From: Predictors of physical and mental health in persons with morbid obesity attending a patient education course – a two-year follow-up study

Independent variables

Physical health two-year follow-up

Mental health two-year follow-up

r

β

p

r

β

p

Step 1. Socio-demographic variables and change in personal variables

 Work status (reference = working)

−0.32*

−0.19

0.14

−0.29*

−0.16

0.18

 Self-esteem change (RSES-4, high scores = decreased self-esteem)

−0.23

−0.15

0.36

−0.27*

−0.32

0.03

 Self-efficacy change (GSE, high scores = increased self-efficacy)

0.11

−0.05

0.74

0.39**

0.34

0.02

Explained variance (R 2 )

 

18.9%

0.01

 

21.0%

<0.01

Step 2. Subsequent treatment

 Surgery (reference = no surgery)

0.41**

0.38

<0.01

0.01

−0.20

0.10

 Change in explained variance

 

5.5%

0.07

 

2.4%

0.22

 Explained variance (R2)

 

24.4%

  

23.4%

 

Step 3. Baseline quality of life (high scores = high quality)

 Baseline physical health

0.39**

0.42

0.001

−0.11

-

-

 Baseline mental health

−0.13

-

-

0.45**

0.58

0.001

 Change in explained variance

 

16.4%

0.001

 

28.4%

<0.001

 Explained variance (R2

 

40.8%

  

51.8%

 
  1. Note. The displayed results from the multivariate analysis are controlled for all predictors in the model.
  2. *p < 0.05
  3. **p < 0.01