Figure 3.

Mean antimicrobial antibody titres in infliximab responders and non-responders. Mean pANCA was higher in non-responders (p = 0.052). Mean total antibody titres (EU/mL) are shown for patients with sustained complete response to infliximab and patients who did not sustain response. An antibody test was considered positive if titres were greater than the cut-off limits as provided by Prometheus: ASCA IgA >20 EU/mL; ASCA IgG >40 EU/mL; pANCA >12.1 EU/mL pANCA IFA DNAse-sensitive; anti-OmpC >16.4 EU/mL; anti-CBir1 >21 EU/mL.