Identifying environmental risk factors for inflammatory bowel diseases: a Mendelian randomization study.

Sci Rep · 2020 · PMC7648100 · PMID 33159156

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a negative trendno p-value reported

Despite this, findings from cross-sectional and cohort studies are conflicting; cross-sectional studies showed an inverse association between BMI and IBD and subtypes 7 , while cohort and population-based studies have described a positive association between BMI and CD, but a negative trend between BMI and UC 31 , 33 .

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