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The efficacy and safety of vedolizumab, a gut-selective α₄β₇ integrin antibody, were demonstrated in the GEMINI 1 and GEMINI 2 clinical trials of adults aged 18–80 years. We investigated the efficacy and safety of vedolizumab in patients stratified by age from the GEMINI trials.

Safety and efficacy, including clinical response, clinical remission, and corticosteroid-free remission, at week 6 and/or 52 were determined post hoc in patients aged <35, 35 to <55, and ≥55 years.

At baseline, 353, 412, and 130 ulcerative colitis (UC) and 582, 443, and 90 Crohn’s disease (CD) patients were aged <35, 35 to <55, and ≥55. Of these patients, 56 were aged ≥65 years (UC: 33, CD: 23). Trends favoring vedolizumab over placebo were observed for most efficacy endpoints irrespective of patient age; some …