IRCT20130508013273N3 IRCT 2018-06-05 Iran Univercity of Medical Sciences The effect of bariatric surgery with three operational methods ( bypass classic, mini bypass and sleeve)on patients' nutritional status and mental health. Evaluation of nutritional status and mental health of patients before and after the bariatric surgery with three operational methods. 2017-10-23 anticipated 120 Complete https://irct.ir/trial/13185 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. N/A obesity. Before the operation, the nutritional status and mental health of patients are determined using a questionnaire and an interview and Patients undergo bariatric surgery. In the following year after operation, patients are assessed to re-evaluate their nutritional status and mental health.. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Until the article is presented, we will not have a decision to publish.