Abstract
Background/Objectives: Identifying key psychological well-being factors in morbid obesity is crucial for designing effective mental health and weight management interventions. This study explores the interconnections between the dimensions of psychological well-being in a large sample of adults with morbid obesity enrolled in an inpatient nutritional rehabilitation program. Methods: A sample of 3212 participants (F = 58%; mean age = 57.18 years; mean Body Mass Index = 43.40 kg/m(2)) completed the Psychological General Well-Being Index (PGWBI) upon admission to the clinic. A network analysis approach examined the relationships among the PGWBI dimensions (anxiety, depression, positive well-being, self-control, vitality, and general health). Results: Network analysis revealed that vitality and positive well-being exhibited the highest values across closeness (1.432; 0.353), strength (0.853; 0.917), and expected influence (0.853; 0917), indicating their key role in psychological well-being. Depression also demonstrated moderate relevance, suggesting its connection to other well-being factors, though it was not the primary determinant. In contrast, self-control and general health had negative strength and expected influence values (-0.660; -1.641), indicating a less central role in the network. Additionally, anxiety and depression displayed negative betweenness (-0.645), reinforcing their more peripheral position. Conversely, positive well-being and vitality showed the highest betweenness (1.291), highlighting their role as key connecting nodes within the well-being network. Conclusions: Findings suggest interventions targeting positive well-being and vitality may most effectively enhance psychological well-being in morbid obesity, emphasizing strength-based approaches that foster positive affect, motivation, and resilience rather than focusing solely on reducing distress or weight-related concerns.