Diabetes distress, the mediator of the poor glycemic control and depression: A meta-analysis

BACKGROUND Diabetes-related distress (DRD) is a common psychological disorder specifically associated with diabetes, its cross-talk with depression, and glycated hemoglobin (HbA1c) was discussed controversially. Interventions addressing DRD were shown to improve HbA1c. However, the primary concern is to investigate the association of DRD with glycemic control. No meta-analyses have compared the effects of depression and diabetes distress on HbA1c. AIM To assess the relationship between DRD, depression, and glycemic control. METHODS We systematically searched PubMed MEDLINE, Google Scholar, and Cochrane Library from inception up to May 2024. The keywords diabetes distress, depression, psychopathology, glycemic control, HbA1c, glycated hemoglobin, fasting, and postprandial blood glucose were used. A datasheet was used to extract the author’s name year and country of publication, diabetes distress, depression, and HbA1c among patients with DRD, depression, and control subjects. RESULTS Out of the 2046 studies retrieved, 55 full texts were screened and 22 studies were included in the final meta-analysis. Diabetes distress was associated with poor glycemic control, odd ratio = 0.42, 95% confidence interval (CI): 0.17-0.67, and P value < 0.001, and odd ratio = 0.52, 95%CI: 0.38-0.72, and P value < 0.001 respectively. No significant difference was observed between depression and DRD regarding the impact on HbA1c, odd ratio = 0.13, 95%CI: 0.15-0.41, P value = 0.37, I 2 for heterogeneity = 76%. However, when heterogeneity was eliminated, diabetes distress influenced the HbA1c more compared to depression, odd ratio = 0.29, 95%CI: 0.17-0.41, and P value < 0.001. CONCLUSION DRD negatively influenced the HbA1c and glycemic control more than depression. Further studies using more specific measures (ecological momentary assessment) to assess DRD are recommended.