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

Table 3 Bivariate relationships (Pearson’s r) and multivariate linear regression analysis (standardized beta coefficients) using baseline variables and surgical treatment to predict SF-12 physical and mental health scores at two-year follow-up (N = 59)

Independent variables	Physical health at two-year follow-up			Mental health at two-year follow-up
Independent variables	r	β	p	r	β	p
Step 1. Socio-demographic and personal variables at baseline
Work status (reference = working)	−0.32*	−0.33	0.007	−0.29*	−0.16	0.22
Self-esteem (RSES-4, high scores = low self-esteem)	0.18	0.27	0.05	−0.39**	−0.20	0.23
Self-efficacy (GSE, high scores = high self-efficacy)	−0.10	0.01	0.97	0.17	−0.65	0.52
Explained variance (R ²)		19.9%	0.01		18.2%	0.01
Step 2. Subsequent treatment
Surgery (reference = no surgery)	0.41**	0.29	0.01	0.01	−0.09	0.52
Change in explained variance		4.9%	0.07		0.8%	0.47
Explained variance (R²)		24.7%			19.0%
Step 3. Baseline quality of life (high scores = high quality)
Baseline physical health	0.39**	0.37	0.002	−0.11	-	-
Baseline mental health	−0.13	-	-	0.45**	0.33	0.03
Change in explained variance		12.6%	0.002		7.2%	0.03
Explained variance (R²)		37.4%			26.3%

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

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