Exploring Obesity Subtypes: Cluster Analysis of Eating Behaviors, Food Addiction, and Psychopathology in Turkish Adults Seeking Obesity Treatment.

Background/Objectives: Obesity results from the complex interplay of biological, psychological, and sociocultural factors. Psychiatric comorbidities and maladaptive eating attitudes are possible contributors to this complexity. Despite accumulating research, current treatment approaches often fail to achieve lasting success, possibly due to the tendency to approach obesity as a uniform condition despite its heterogeneity. This study aimed to identify distinct subgroups of adults with obesity based on their eating behaviors, psychopathology, and food addiction (FA). Methods: The study included 202 adults seeking obesity treatment at Ankara Dışkapı Training and Research Hospital, Turkey. Participants completed the Three Factor Eating Questionnaire-R18, Yale Food Addiction Scale, Night Eating Questionnaire, and Symptom Checklist-90-R (SCL-90-R). Psychiatric diagnoses were confirmed through clinician-administered semi-structured interviews (SCID-5-CV). Two-step cluster analysis was performed using z-standardized variables of eating and psychopathology measures. Subsequent comparisons were conducted between the identified subgroups. Results: Two distinct clusters were identified and described in terms of adaptive and maladaptive eating traits: an Adaptive group (n = 92, 45.5%) and a Maladaptive group (n = 110, 54.5%). The Maladaptive cluster exhibited higher levels of emotional eating, uncontrolled eating, night eating, FA, and general psychopathology (all p < 0.001), along with a greater prevalence of major depressive disorder and binge eating disorder. Conclusions: Our findings indicate that psychopathology and maladaptive eating behaviors meaningfully distinguish two obesity phenotypes. Nearly half of individuals with obesity, characterized by maladaptive eating traits, FA, or elevated psychopathology, may constitute a subgroup that would particularly benefit from psychoeducation or targeted psychiatric intervention.