To asses the effect of non-pharmacological interventions from previous randomised controlled trials a meta-analytic review is carried out. 40 studies are included in the analysis that had met the following inclusions criteria: 1) randomized controlled trials; 2) published in an English or Nordic language; 3) participants were adults with type 2 diabetes; 4) tested the effect of self-care behaviour interventions; 5) reported measures and statistical data on the effect of the intervention on diabetic specific parameters; and 6) information about means and standard deviations available to calculate effect sizes. The following databases were searched: Medline, PubMed, Embase, CINAHL, PsycInfo including PsychLIT, Cochrane Library and SveMed+. The effect sizes in the included studies will be pooled by use of a random-effects model because we expect heterogeneity between studies.