Disease knowledge after an educational program in patients with GERD – a randomized controlled trial

Table 2 Multiple linear regression analysis of knowledge test scores at 2 and 12 months follow-up as dependent variables and independent variables at baseline which correlated with knowledge test score at p < 0.2

	2 months			12 months
Independent variable ¹	*Beta*	p	R ² *change*	*Beta*	p	R ² *change*
Allocation to education group	3.6	< 0.001	0.29	2.7	< 0.001	0.17
Formal educational level	1.1	< 0.001	0.06	1.2	< 0.001	0.07
GHQ-score at time of inclusion	- 0.1	< 0.001	0.08	- 0.2	< 0.001	0.12
Psychiatric disease at time of inclusion	- 1.6	0.01	0.02	- 1.5	0.02	0.02
R² (adjusted) for the model	0.44			0.36

¹ Variables excluded in both models: Previous history of serious disease, esophagitis, having used PPI or H2-blocker, DSIQ sum-score, global QoL.

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