Theory-based diabetes self-management education with pre-selection of participants: a randomized controlled trial with 2.5 years' follow-up (ELDES Study).

In contrast to the first BGI study, we did not observe significant effects of the BGI intervention, despite pre-selection of individuals. In diabetes populations with target levels for HbA1c , systolic blood pressure and LDL cholesterol, no further beneficial effects can be expected from self-management programmes with regard to biomedical factors and quality of life.