A greater proportion of AS-IBD patients had a quartile score of 4 (highest quartile) than AS patients, for IgA ASCA (36.4% versus 21.1%, P = 0.049), IgG ASCA (35.1% versus 17.9%, P = 0.016), anti-OmpC (37.7% versus 18.4%, P = 0.001) and anti-CBir1 (42.9% versus 19.7%, P = 0.003). Here, CD79A is linked to inflammatory bowel disease.