Rs1800471

rs1800471 encodes a change at codon 25 of the TGFB1 gene. It is reported to predispose several organs to fibrosis, and in relation to Crohn's disease, it was associated with stricturing Crohn's disease (odds ratio 2.63, CI: 1.16-5.88, p=0.01) and a shorter time to intestinal resection (p = 0.06) in a study of several hundred Australian patients.