BackgroundBariatric surgery is an effective long-term treatment for severe obesity. Psychological outcomes after surgery are clinically important.MethodsThis prospective, non-interventional, longitudinal cohort enrolled adults scheduled for bariatric surgery at King Abdulaziz University Hospital (Jeddah, Saudi Arabia). The participants completed two online questionnaires: one pre-and one post-surgery (planned at approximately 6 months). Depression and anxiety symptoms were assessed using the Pat