<qa>  How many irritable bowel syndrome patients were selected?The study was quasi-experimental including patients in two intervention and control groups. Three measurements were done: pretest, post-test, and a two-months follow-up. The study population included patients with irritable bowel syndromediagnosed by specialists and based on the criteria of Rome III, who referred to a general Hospital. Fifty two irritable bowel syndrome patients were selected and assigned to two experiment 26 cases and control 26 cases groups. The criteria below were considered in selection of patients. 