A Meta-analysis From a Self-regulation Perspective Purpose

The main purpose of this article was to investigate the value of a self-regulation approach for weight reduction interventions in patients with type 2 diabetes. In addition, the potentially moderating effect of other intervention characteristics was explored. Methods In a meta-analysis of 34 studies, overall effect sizes were calculated for weight and A1C. The focus of the analysis was, however, on the moderating effect of intervention characteristics, especially whether interventions that score high on self-regulation produce stronger effects. Results The overall effect sizes (d) for weight loss in the short term (<6 months) were low and even lower in the longer term (>6 months). The overall effect sizes for A1C out-comes were higher and remained stable in the longer term. Interventions that scored high on self-regulation characteristics produced significantly better effects on both weight and A1C outcomes. Furthermore, “goal reformulation ” increased the effect on weight outcomes whereas “emotion regulation ” increased the effect on A1C. With respect to the other intervention characteris-tics, only the “inclusion of a patient’s partner or relative” increased the effect on weight loss