RESUMO
Irritable Bowel Syndrome [IBS] is an important public health problem, owing both to its high prevalence and its impact on the quality of life. The purpose of this study was to investigate the prevalence and risk factors of IBS and its relationship to life style in Qashqai migrating nomads with a different lifestyle in Fars province, southern Iran. In summer 2006, 748 Qashqai migrating nomads aged 25 years or more were enrolled, using a multiple-stage stratified cluster random sampling method. A questionnaire consisting of demographic data and IBS symptoms was completed for each subject. For about 50% of them, SF 36 questionnaire was also completed. The prevalence rate of IBS was 11.8% and there was a close relationship between IBS and the life quality. The prevalence of IBS in Qashqai migrating nomads was higher than the urban population in the area with a close relationship to the life quality