Journal
DIGESTIVE AND LIVER DISEASE
Volume 48, Issue 12, Pages 1425-1431Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.dld.2016.08.129
Keywords
Crohn's disease; Inflammatory bowel disease; Meta-analysis; Physical activity; Ulcerative colitis
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Funding
- Applied Basic Research Fund of Changzhou, China [CJ20140022]
- High-level Medicine Talents Training Project [2016CZBJ022]
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Background: Previous studies of an association between physical activity and inflammatory bowel disease have yielded conflicting results. Aim: This meta-analysis was conducted to clarify whether there is an association between physical activity and inflammatory bowel disease. Methods: The PubMed and Web of Science databases were searched for relevant studies published up to October 2015. Data were extracted and the summary relative risks (RRs) were calculated using a random effects or a fixed-effects model, according to heterogeneity. Results: Seven studies were included in the analysis. Relative to individuals with low physical activity, those who participated in high physical activity had an RR of 0.63 (95% CI, 0.50-0.79) for developing Crohn's disease. In stratified analyses, a significantly lower risk for Crohn's disease was associated with high physical activity in Europeans only (RR, 0.62; 95% CI, 0.43-0.91); population-based control studies (RR, 0.56; 95% CI, 0.41-0.76); and case-control studies (RR, 0.56; 95% CI, 0.41-0.75). The data of 6 studies were pooled to analyze the effect of physical activity on the risk of ulcerative colitis, and no significant association was found (RR, 0.82; 95% CI, 0.68-1.00). Conclusions: The pooled results of observational studies support that physical activity has a protective effect against Crohn's disease. (C) 2016 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.
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