Efficacy and safety of anti-Tumor Necrosis Factor-α biosimilars in Juvenile Idiopathic Arthritis - a systematic review and meta-analysis.
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OBJECTIVES: Anti-Tumor Necrosis Factor-α (aTNF) biologics have transformed the management of Juvenile Idiopathic Arthritis (JIA), but their high-cost limits access. Biosimilars provide an affordable alternative. We aimed to summarize the data on the efficacy and safety profiles of aTNF biosimilars in JIA. METHODS: A systematic search was conducted through the Cochrane Library, Embase, PubMed, Scopus, and Web of Science. Studies evaluating the use of aTNF biosimilars in JIA patients compared against originators or placebo, published from inception to 30th August 2024, were included. Quality of included studies was assessed by the Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) tool. Efficacy and safety outcomes were summarized descriptively, and meta-analysis was performed where appropriate. (PROSPERO Registration ID: CRD42024523627) RESULTS: Five observational studies were identified. Risk of bias was assessed to be serious in all studies. All but one study showed no significant difference between biosimilars and originators in head-to-head comparisons of disease activity measured using Juvenile Arthritis Disease Activity Scores (JADAS). In two studies on switching of originators to biosimilars, disease activities remained stable after switch until the end of study follow-up. Adverse events were similar between biosimilars and originators (OR 0.78, 95%CI: 0.52-1.17). CONCLUSION: Biosimilars and originators of aTNF are similar in efficacy and safety in pediatric patients with JIA. However, there is a lack of high-quality studies. This review should be updated as more studies become available.