Mirikizumab, an anti-IL23p19 antibody, has demonstrated safety and efficacy versus placebo across clinical remission, symptomatic remission, and endoscopic and histologic endpoints in patients with moderately-to-severely active ulcerative colitis (UC) in a Phase 3, double-blind, 12-week induction study (LUCENT-1/NCT03518086) and 40-week maintenance study (LUCENT-2/NCT03524092). Here, we examine the relationship between bowel urgency (BU) clinically meaningful improvement (CMI) and BU remission with rectal bleeding (RB) remission and stool frequency (SF) remission (Table 1 for definitions).