Emotional Eating, Impulsivity, and Affective Temperaments in a Sample of Obese Candidates for Bariatric Surgery: Which Linkage?

Abstract

Background/Objectives: Obesity is a major public health challenge of the 21st century, with prevalence rates steadily rising globally. Disordered eating behaviors, particularly emotional eating (EE), complicate the clinical management of obesity and hinder long-term outcomes, such as maintaining weight loss after bariatric surgery. Studies reveal that EE affects 65-75% of overweight or obese adults, and such behavior may stem from a disrupted brain reward system linked to emotional dysregulation and impulsivity. Impulsivity in obesity involves deficient cognitive inhibitory control, creating an imbalance between impulsive and reflective systems. While problematic eating behaviors and obesity are well studied, the role of affective temperaments-innate traits influencing mood, energy, and responses to stimuli-remains underexplored. This study aims to examine the interplay between emotional eating, impulsivity, and affective temperaments in obese patients preparing for bariatric surgery. Methods: A total sample of 304 obese outpatients was consecutively enrolled at the Psychiatry Clinic of the Department of Clinical and Experimental Medicine of the University of Pisa during the presurgical mental health evaluation routinely performed before the bariatric intervention. Sociodemographic and clinical data were collected by psychiatrists during a single consultation. Assessments also included the following psychometric tests: the Structured Clinical Interview (SCID-5), the Emotional Eating Scale (EES), the Barratt Impulsivity Scale-Version 11 (BIS-11), and the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego-Auto-questionnaire (TEMPS-A). Results: A significant correlation was observed between the EES total score and the BIS total score (p = 0.003), as well as with the sub-dimensions of attentional impulsivity (p < 0.001) and motor impulsivity (p = 0.024). In addition, a significant correlation has been found between the total score of EES and the cyclothymic (p < 0.001), depressive (p < 0.001), irritable (p = 0.013), and anxious (0.020) temperaments. When comparing obese patients with EE and without EE (No-EE), higher rates of both current (p = 0.007) and lifetime (p = 0.024) psychiatric comorbidities were observed in the EE group, namely for anxiety disorders (p = 0.008) and eating disorders (p = 0.014). Conclusions: Our study highlights a significant association between EE in obese patients with the cyclothymic, irritable, anxious, and depressive temperaments, and impulsivity dimension. Thus, problematic eating behaviors and temperamental traits may have a bidirectional psychopathological influence in obese patients and need to be carefully evaluated in subjects seeking bariatric surgery.

Keywords: affective temperaments; bariatric surgery; disordered eating behaviors; emotional eating; impulsivity; obesity; problematic eating behaviors.