Personality, Emotion Regulation, and Psychological Distress in Italian Women with Feeding and Eating Disorders: A Cross-Sectional Study

Background/Objectives: Feeding and Eating Disorders (FEDs) are among the most challenging mental disorders due to their pervasive symptomatology and high relapse rates. While considerable research has focused on the role of personality in the onset and maintenance of FEDs, it remains unclear whether specific personality dimensions and emotion dysregulation mechanisms predict clinical severity and purging behaviors. This study aimed to explore the role of personality dimensions, emotion dysregulation, and purging behaviors in predicting psychological distress in patients with FEDs, adopting a dimensional and integrated perspective. Methods: A sample of cisgender women in a semi-residential treatment for FEDs or obesity (n = 124) was recruited in southern Italy and assessed using a psychodiagnostics survey, including the Eating Disorder Inventory-3 (EDI-3), the Symptom Checklist-90-R (SCL-90-R), and the Personality Inventory for DSM-5 (PID-5). Results: Patients with bulimia nervosa exhibited higher psychological distress compared to patients with other FEDs and Obesity, which was not significantly determined by the co-occurrence of personality disorders. Negative affectivity, detachment, and purging symptoms were significantly related to psychological distress in patients with FEDs and Obesity (p ranging from 0.028 to <0.001). Moreover, the results showed an indirect effect of emotion regulation on the relationship between self-esteem and purging symptoms in patients with FEDs and Obesity (β = 0.107; p = 0.046). Conclusions: These findings suggest that specific personality dimensions, emotion dysregulation, and purging symptoms are associated with psychological distress in individuals with FEDs and Obesity. Therefore, it is necessary to reflect on the impact of these psychological components in planning tailored treatment for FED patients.