Abstract: Objective: To analyze the predictive value of obesity-related anthropometric indices for Peristomal Moisture-associated Skin Dermatitis (PMASD), so as to provide a reference for clinical nursing. Methods: A total of 1000 inpatients/outpatients with enterostomy from a tertiary grade A hospital in Zhejiang province between September 2024 and June 2025 were conveniently selected as the study subjects. Data were collected using a general information questionnaire, the Ostomy Skin Tool, and obesity-related anthropometric measurements. Binary Logistic regression was used to analyze the associations, and the Receiver Operating Characteristic curve (ROC) was employed to evaluate the predictive performance of the obesity-related anthropometric indices and determine the optimal cut-off values. Results: The incidence of PMASD among patients with enterostomy was 56.9%. The Areas Under the ROC Curve (AUC) for body roundness index , weight-waist index, a body shape index, and BMI were 0.825, 0.754, 0.714, and 0.643, respectively, with all indices showing predictive value (P<0.05). The AUC of the body roundness index was significantly superior to the other three obesity-related anthropometric indices (all P<0.008 3), with an optimal cut-off value of 4.105 (sensitivity 82.3%, specificity 79.6%). Conclusion: Patients with enterostomy have a high risk of developing PMASD. Obesity-related anthropometric indices show good predictive performance, with the body roundness index being the most effective. Clinical practice should strengthen the dynamic monitoring of these indices and implement targeted interventions to reduce the risk of PMASD.

Key words: enterostomy; Peristomal Moisture-associated Skin Dermatitis; obesity-related anthropometric indices; risk prediction