A Relationship between Irritable Bowel Syndrome and Physical Activity in Women Nurses with Shift Work

Background: Irritable bowel syndrome (IBS) is a chronic recurrent gastrointestinal disorder that may deteriorate life quality significantly. There is no specific way of curing IBS but to rely on symptomatic and supportive treatment as well as changes in lifestyle. Previous studies have suggested that physical exercise might be effective for improving IBS symptoms. However, evidence does not exist for Korean population. This study was performed to evaluate the association of physical activity with IBS. Methods: A total of 706 women nurses with shift work in a university affiliated tertiary hospital were surveyed with a self-administered questionnaire asking IBS symptoms (Rome III criteria), depression (Zung's Self-rating Depression Scale), anxiety (Goldberg's Short Screening Scale for Anxiety, GAS), stress (Brief Encounter Psychosocial Instrument), demographic characteristics, and health behavior. The association between IBS and physical activity was examined using chi-square test and multiple logistic regression analysis. Results: Prevalence of IBS was 37.5% and the most common subtype of IBS was mixed constipation and diarrhea (70.6%). Neither physical activity nor regular exercise was not associated with IBS. IBS was independently associated with higher level of anxiety (GAS score >= 5), tolerable dysmenorrhea, and troublesome dysmenorrhea with odds ratios (95% confidence intervals) of 2.10 (1.37-3.22), 2.83 (1.39-5.75), and 2.56 (1.21-5.40), respectively. Conclusion: In Korean women nurses with shift work, IBS was not associated with physical activity. However, the higher level of anxiety and dysmenorrhea were independently associated with increased risk of IBS. Conclusion: In Korean women nurses with shift work, IBS was not associated with physical activity. However, the higher level of anxiety and dysmenorrhea were independently associated with increased risk of IBS.