Irving, Peter M.

Abstract Background Patient age can impact the safety and efficacy of ulcerative colitis (UC) treatments. Etrasimod is an oral, once daily (QD), selective sphingosine 1-phosphate1,4,5 receptor modulator for the treatment of moderately to severely active UC. Here, we evaluate the impact of age on etrasimod safety and efficacy in patients with UC in the phase 3 ELEVATE UC clinical program. Methods Data were pooled from ELEVATE UC 52 and ELEVATE UC 12 in patients receiving etrasimod 2 mg QD or placebo. Proportions and incidence rates (IRs) per 100 patient-years of treatment-emergent adverse events (AEs) were stratified by age (<40, 40-59, and ≥60 years). With the same age stratifications, efficacy was evaluated in patients with baseline Modified Mayo scores of 5-9 and 4-9 for the primary efficacy endpoint (clinical remission) and secondary efficacy endpoints. Results Overall, 787 patients were enrolled (<40 years, n = 420 [53.4%]; 40-59 years, n = 276 [35.1%]; and ≥60 years, n = 91 [11.6%]). Arthralgia, fatigue, and hypertension IRs were higher in older patients, irrespective of treatment. Serious AEs and AEs leading to treatment discontinuation were low and consistent across age groups. Significantly more patients receiving etrasimod 2 mg QD vs placebo achieved efficacy endpoints, regardless of age. Conclusions The safety profile of etrasimod 2 mg QD in the ELEVATE UC population was consistent across age groups, with no change in the incidence of AEs. Patients receiving etrasimod vs placebo showed significant clinical benefit, regardless of age. ClinicalTrials.gov NCT03945188; NCT03996369.