Preliminary efficacy of an acceptance-based diabetes education (ACT-DE) programme for people with type 2 diabetes on diabetes distress and self-care behaviours: A pilot randomised controlled trial

Background: Diabetes distress is often characterised by aversive feelings about diabetes and avoidance of diabetes self-care, leading to suboptimal blood glucose control, diabetes complications and depression. Evidence from a recent review has indicated the potential efficacy of acceptance-based diabetic self-management programmes for improving blood glucose levels and mental health outcomes by fostering psychological flexibility. Methods: We conducted a two-arm and assessor-blinded pilot randomised controlled trial (RCT) with 48 participants aged 18-64 with type 2 diabetes and moderate distress levels, in which we compared a 6-week acceptance and commitment therapy and diabetes education (ACT-DE) programme intervention with diabetes education. Diabetes distress (the primary outcome), self-care behaviour, self-efficacy in diabetes management, and psychological inflexibility were measured at baseline and post-intervention. Focus group interviews were conducted to explore the intervention group's perceptions of the benefits and limitations of the intervention. Results: Results of ANCOVA test showed that the intervention group exhibited significantly greater decrease in diabetes distress (effect size [Cohen's d] = 0.65), and increase in exercise frequency (d = 1.16), and foot-care frequency (d = 0.59) than the diabetes education group. The qualitative feedback of the intervention group revealed that the learnt ACT skills can be effectively applied in self-care and highlighted the utility of some of the intervention's therapeutic components, primarily mindfulness practices, metaphors, and interactive diabetes education. The intervention was well-accepted, with an 87.5% completion rate, but caution is needed due to a low recruitment rate (28.1%) during COVID-19 pandemic peak. Conclusion: This pilot study confirmed that ACT-DE programme is an acceptable intervention for people with type 2 diabetes. It demonstrated preliminary efficacy with medium-to-large effect sizes in alleviating the participants' diabetes distress and improving their self-care. Recruitment strategies can be improved to enhance the feasibility. Moreover, a full-scale RCT with longer-term follow-up is warranted to examine the intervention effects on diabetes distress, blood glucose control and other health outcomes.