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Frequency of Primary Outcomes Among CD Patients with High vs Low Serum GM-CSF Ab Concentration. The frequency of A) LN or B) stricturing is shown with differences between groups tested using Fisher's exact test. A) Increased prevalence of luminal narrowing in patients with CD and high GM-CSF Ab (71%) compared with 39% of patients with low levels, **p=0.004. B) Increased prevalence of strictures in patients with high GM-CSF Ab (19%), compared with those with low levels (4%), *p=0.03.
