PRTN3 and inflammatory bowel disease: In general, the antibody status of IBD-U patients was closely related to UC with a high number of xANCA (46/76 (60.5%) vs. 25/50 (50%) UC patients, respectively) and PR3-ANCA (20/76 (26.3%) vs. 12/50 (24%), respectively) positivity as well as a low number and low titer of ASCA positivity (14/76 (18.4) vs. 34/50 (68%) CD patients).