From the article:
"Adopting and maintaining a healthy lifestyle may prevent inflammatory bowel disease (IBD), according to findings from an analysis of three prospective U.S. cohort studies, which were validated in three external European cohorts.
In the primary analysis, maintaining low modifiable risk scores -- based on risk factors including body mass index, smoking status, use of non-steroidal anti-inflammatory drugs, physical activity, and daily consumption of fruit, vegetables, fiber, polyunsaturated fatty acids, and red meat -- could have prevented 42.9% of Crohn's disease cases and 44.4% of ulcerative colitis cases, reported Hamed Khalili, MD, MPH, of Massachusetts General Hospital in Boston, and colleagues.
Moreover, adherence to a healthy lifestyle could have prevented 61.1% of Crohn's disease cases and 42.2% of ulcerative colitis cases, they noted in Gut."
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"Adopting and maintaining a healthy lifestyle may prevent inflammatory bowel disease (IBD), according to findings from an analysis of three prospective U.S. cohort studies, which were validated in three external European cohorts.
In the primary analysis, maintaining low modifiable risk scores -- based on risk factors including body mass index, smoking status, use of non-steroidal anti-inflammatory drugs, physical activity, and daily consumption of fruit, vegetables, fiber, polyunsaturated fatty acids, and red meat -- could have prevented 42.9% of Crohn's disease cases and 44.4% of ulcerative colitis cases, reported Hamed Khalili, MD, MPH, of Massachusetts General Hospital in Boston, and colleagues.
Moreover, adherence to a healthy lifestyle could have prevented 61.1% of Crohn's disease cases and 42.2% of ulcerative colitis cases, they noted in Gut."

Can a Healthy Lifestyle Prevent IBD?
Modifying diet, not smoking, exercising could help, analysis of cohort studies suggests