Depression predicts first but not recurrent diabetic foot ulcers

Area of Science:

• Endocrinology
• Neurology
• Psychiatry

Background:

• Diabetic foot ulcers are a significant complication of diabetes, particularly in patients with diabetic peripheral neuropathy (DPN).
• Depression is a common comorbidity in patients with diabetes and may influence self-care behaviors and health outcomes.
• The interplay between depression, DPN, and the development of foot ulcers requires further investigation.

Purpose of the Study:

• To investigate the relationship between depression symptoms and the incidence of diabetic foot ulcers in patients with DPN.
• To determine if depression is an independent predictor of foot ulceration, considering factors like foot ulcer history and self-care.
• To explore the potential mediating role of foot self-care in the depression-foot ulceration relationship.

Main Methods:

• A cohort of 333 patients with DPN (without peripheral vascular disease) were followed for 18 months.
• Depression, diabetes complications, and foot self-care were assessed via self-report.
• Cox regression models were used to analyze the predictive value of depression on foot ulcer development, accounting for ulcer history and self-care.

Main Results:

• 63 patients developed a foot ulcer during the follow-up period.
• A history of foot ulcers significantly increased the risk of subsequent ulceration (HR > 4).
• Depression was independently associated with an increased risk of developing first foot ulcers (HR 1.68), but not recurrent ulcers. Improved foot self-care was associated with a reduced risk (HR 0.61).

Conclusions:

• Depression is a significant risk factor for the initial development of foot ulcers in DPN patients, independent of biological factors and self-care.
• Foot self-care is inversely associated with foot ulcer risk.
• Targeted interventions for depression and foot self-care are recommended for primary prevention of diabetic foot ulcers in at-risk populations.