Analysis of Changes in Eating Habits on Post Bariatric Surgery Patients and Their Family Members

As secondary objectives, the study aims to: * Describe the sociodemographic and clinical characteristics of post bariatric surgery patients. * Assess changes in quality of life of the post-surgery patients. * Explain changes of post-surgery in eating behavior and activity varied according to gender * Explain changes of post-surgery in eating behavior and activity varied according to socio-economic conditions * Explain changes of post-surgery in eating behavior and activity varied according to inter-generational relation * Have a overview on the surgery as a turning point in the life of patients * Estimate the relevant message of cares given to patients, in order to better adjust medical intervention, in conjunction with patients and their family members. This is a prospective observational study. It will be performed in two university hospitals: CHU Ambroise Paré at Boulogne-Billancourt city and CHU Pitié Salpétrière at Paris, in nutrition department and metabolic surgery department. The study will involve collaboration of a team of social researchers.