Background: Irritable bowel syndrome is a common functional diseases of the gastrointestinal tract
that require more attention. Lifestyle modification intervention is an important strategy to improve
health, symptoms and quality of life of IBS patients. Aim of the study was to examine effect of
lifestyle modification on symptoms reduction and quality of life improvement among adults with
irritable bowel syndrome. Methods: Research design: A quasi experimental design (pre-posttest)
was used to conduct the present study. Setting: This study was conducted in internal medicine
outpatient clinic at University Hospital in Menoufia governorate, Egypt. Subjects: A purposive
sample of 75 adults were recruited in this study. Tools: (1) An interviewing questionnaire consisted
of three parts; I- Adults' socio- demographic data II- Adults' clinical data. III- Adults, knowledge
questionnaire about IBS (2) IBS- Severity Symptom Scale. (3) IBS-QOL questionnaire. Results:
After implementation of lifestyle intervention, the total mean score of knowledge was improved
from 43.90 ±10.57 to 79.69 ±7.27 and the total mean score of IBS- symptoms were reduced from
223.56 ±65.50 to 151.93 ±79.55. Also, there was a highly statistical significant improvement in total
IBS- quality of life score among study sample at (p <0.001). Conclusions: Lifestyle modification
intervention for three months had a positive effect and significantly reduce IBS symptoms, enhance
knowledge and succeeded in improving quality of life among adults with irritable bowel syndrome.
Recommendation: Continuous patients' education about IBS disease should be planned regularly in
outpatient clinic to control the disease symptoms and reduce its unwanted effect on quality of life.