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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

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

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