Diverticulitis
Diet

A 2017 analysis found a dietary pattern high in red meat, refined grains, and high-fat dairy was associated with increased risk of incident diverticulitis whereas a dietary pattern high in fruits, vegetables, and whole grains was associated with decreased risk. Men in the highest quintile of western dietary pattern score had a multivariate hazard ratio (HR) of 1.55 (95% CI, 1.20–1.99) for diverticulitis compared to men in the lowest quintile. Recent dietary intake may be more strongly associated with diverticulitis than long-term intake. The associations between dietary pattern and diverticulitis were largely due to red meat and fiber intake. A systematic review published in 2012 found no high-quality studies, but found that some studies and guidelines favour a high-fiber diet for the treatment of symptomatic disease. A 2011 review found that a high-fiber diet may prevent diverticular disease, and found no evidence for the superiority of low-fiber diets in treating diverticular disease. A 2011 long-term study found that a vegetarian diet and high fibre intake were both associated with lower risks of hospital admission or death from diverticulitis.
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