RESUMEN
BACKGROUND: Bariatric surgery is the most effective treatment to reduce weight permanently which is essential to avoid, to improve or even to cure life-threatening comorbidities. Little is known about changes of the psychological etiology and risk factors. METHODS: The present study concentrated on psychological variables which are considered to cause or promote obesity. The changes of symptoms were measured by the AD-EVA test inventory. A total of 60 patients (24 male/36 female, age 18-71 years) were tested prior to gastric bypass or gastric banding (body mass index BMI M=44.95, SD=6.91) and postoperatively (BMI M=33.92, SD=7.23). RESULTS: Following surgery the variables addiction (t=11.15, p<0.01) and binge eating disorder (t=2.13, p<0.05) showed significant changes across all patients and therefore confirmed a positive effect but restrained eating and bulimia remained unmodified after surgery. There were significant differences between the two bariatric methods (p<0.01). DISCUSSION: A precise interdisciplinary evaluation is a prerequisite for deciding between gastric banding and the bypass technique as well as to define the need for preoperative and postoperative psychotherapy.