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Patients with Crohn disease (CD), particularly if they have obstruction, are commonly instructed to follow a low-fiber or low-residue diet. To examine the effect of fiber in CD, investigators evaluated 1619 patients with inflammatory bowel disease (1130 had CD and 489 had ulcerative/indeterminate colitis) participating in an Internet cohort study and in remission at baseline, based on disease activity index. Patients completed a 26-item dietary survey and were followed up 6 months later.
Patients with ulcerative colitis (UC) ingested more fiber than CD patients, but no association was found between fiber intake and risk for disease flare in UC patients. However, CD patients with the highest quartile of fiber intake had a 43% lower risk for f…