Interestingly, in comparison with a high incidence of IBD in the West with 8 to 14 per 100,000 for UC and 6 to 15 per 100,000 for CD30, there is a very low incidence of IBD in Han Chinese with 1.17 per 100,000 for UC and 0.40 per 100,000 for CD, higher in UC than CD31. This evidence concerns the gene PECAM1 and inflammatory bowel disease.