IRCT20220329054367N1 IRCT 2022-04-25 Shahid Beheshti University of Medical Sciences The effect of lifestyle and diet modification on psychological symptoms in patients with irritable bowel syndrome The effect of lifestyle modification treatment and dietary change on the quality of life, severity of gastrointestinal symptom and the level of anxiety, and depression in patients with irritable bowel syndrome 2018-04-21 anticipated 55 Complete https://irct.ir/trial/62671 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Supportive. 2 Irritable bowel syndrome (IBS). Intervention 1: Intervention group: Lifestyle modification intervention was performed for two months. (Interventions include: adequate physical activity training as 150 minutes per week –medium speed walking-no smoking, and alcohol psychology consultants). Intervention 2: Intervention group: Diet change to LOW FODMAP for two months period. The training was done by a dietician, and written protocol. No - There is not a plan to make this available Justification or reason for not sharing IPD is In order to maintain the research information, the data will not be published, but only in the form of articles and the result of the analysis