Association between self-stigma and diabetic complications in Japanese people with type 2 diabetes: a cross-sectional study

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OBJECTIVES: To investigate the association between self-stigma evaluated using the Japanese version of the Self-Stigma Scale (SSS-J) and diabetic complications, such as diabetic retinopathy (DR) and diabetic kidney disease (DKD). DESIGN: Cross-sectional study. SETTING: One university hospital and one clinic in Fukuoka, Japan. PARTICIPANTS: People (age ≥20 years) with type 2 diabetes receiving outpatient care, who were treated by diabetologists, and completed the SSS-J questionnaire (n=259). PRIMARY AND SECONDARY OUTCOME MEASURES: The primary outcome was the level of self-stigma assessed using the SSS-J. The presence of DR and DKD was evaluated as secondary outcomes. RESULTS: =0.132, p=0.034). The mean SSS-J score was significantly higher in people with type 2 diabetes who had DR than in those without DR (p=0.006). There was no significant difference in the mean SSS-J scores of the patients with albuminuria (p=0.318) or a decreased kidney function (p=0.887). Additionally, the relative risk for the presence of DR, as assessed by quartiles of SSS-J scores and a logistic regression analysis, was significantly increased in the Q4 group with the highest SSS-J score after adjustment for sex, age and HbA1c (OR=3.91, 95% CI 1.49 to 10.3, p=0.006). The relative risk for the presence of albuminuria as a DKD significantly increased in the Q4 group immediately after adjustment for sex and age (OR=2.45, 95% CI 1.04 to 5.81, p=0.042). However, this association was attenuated and became non-significant after additional adjustment for HbA1c levels. In contrast, no significant association was observed between the SSS-J score quartiles and decreased kidney function. CONCLUSIONS: The presence of DR was more strongly associated with self-stigma than DKD. Although the causality between self-stigma and the presence of DR could not be elucidated due to the cross-sectional nature of the study, the present study suggests that addressing self-stigma may aid in glycaemic management and the prevention of DR, emphasising the need for healthcare providers to recognise self-stigma as a barrier to optimal diabetes care.

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