RESUMEN
PURPOSE: Surgery remains the only treatment allowing for a significant and sustainable weight loss in case of severe obesity. Patients undergo a specific multidisciplinary preparation and selection before the operation. This study aims to correlate the psychosocial profile with the likelihood of undergoing bariatric surgery in patients enrolled in the preparation program of a Swiss reference center. METHODS: All patients referred to an obesity center between January 1, 2016, and June 30, 2017, seeking a first bariatric procedure were included. Socio-demographic data, BMI, preoperative psychological and dietary evaluations were collected. Usually, the preoperative process lasts 1 year. Patients who left the preparation or who had not undergone surgery after more than 2 years of follow-up were considered withdrawers. Surgery completion predictors were reviewed with bivariate analysis and socio-demographic clusters established using the K-means method. RESULTS: Out of a total of 221 patients, 99 (45%) patients had not undergone bariatric surgery 2 years after their first consultation. The patients were divided into four distinct socio-demographic clusters, among which a particularly deprived one. Criteria such as unfavorable psychological (p < 0.001) and dietary (p < 0.001) evaluations, and male gender (p < 0.05) were significantly associated with non-operation, unlike socio-demographic indicators and clusters (p > 0.1). CONCLUSION: Almost half of the patients starting a bariatric program are not operated on, which is related to an unfavorable psychological or dietary evaluation and to the male gender. This study also demonstrates that a significant share of patients combines several factors of social deprivation, without influencing the likelihood of surgery completion. LEVEL OF EVIDENCE: Level V: Descriptive study.