Abstract
This study compared real-world effectiveness between adalimumab (ADA) and infliximab (IFX) in children with Crohn's disease (CD). Children enrolled into the prospective Canadian Children Inflammatory Bowel Disease Network National Inception Cohort between 2014 and 2020 who commenced ADA or IFX as first antitumor necrosis factor (anti-TNF) agent for luminal CD were included. Multivariate logistic regression modeled the propensity of commencing ADA; propensity score matching was used to match IFX-treated children to ADA-treated children. The primary outcome at 1 year was steroid-free clinical remission (SFCR). Secondary outcomes at 1 year were (i) combined SFCR and C-reactive protein remission, (ii) treatment intensification, and (iii) anti-TNF durability. Odds ratios (ORs) and hazard ratio adjusted for concomitant immunomodulator use with 95% confidence interval (CI) are reported. In the propensity score-matched cohort of 147 ADA-treated and 147 IFX-treated children, 92 (63%) ADA-treated and 87 (59%) IFX-treated children achieved SFCR at 1 year (adjusted OR 1.4, 95% CI 0.9-2.4); 75 of 140 (54%) ADA-treated and 85 of 144 (59%) IFX-treated children achieved combined SFCR and C-reactive protein remission (adjusted OR 1.0, 95% CI 0.6-1.6). ADA-treated children less frequently underwent treatment intensification (21 [14%]) compared with IFX-treated children (69 [47%]) ( P < 0.0001). Discontinuation of anti-TNF occurred in 18 (12%) ADA-treated and 15 (10%) IFX-treated children (adjusted hazard ratio 1.2, 95% CI 0.6-2.2). Children with CD achieved favorable outcomes at 1 year with either ADA or IFX as first anti-TNF agents. Those receiving IFX did not have significantly superior outcomes compared with clinically similar children receiving ADA.
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