Abstract 4146209: Comparative Efficacy and Safety of Colchicine and Anti-Interleukin-1 Agents in Recurrent Pericarditis: A Pairwise and Network Meta-analysis of Randomized Controlled Trials

Background: The management of recurrent pericarditis has evolved to include colchicine and novel anti-interleukin-1 agents, given the limited efficacy of traditional NSAIDs and corticosteroids. We conducted a pairwise and network meta-analysis to evaluate the efficacy and safety of colchicine and anti-IL-1 agents in recurrent pericarditis. Methods: We conducted a comprehensive search on various databases and registries, such as MEDLINE (via PubMed), Embase, and Cochrane Central Register of Controlled Trials (CENTRAL), to retrieve relevant RCTs. We used STATA version 17 to perform meta-analyses under a random-effects model and applied the empirical Bayes (Paule and Mandel) variance estimator to dichotomous data. We performed a network meta-analysis with a placebo/standard therapy group as the comparator in MetaXL 5.3 using the Generalized Pairwise Modeling based on the Bucher method. Results: A total of 6 RCTs were included in the meta-analysis. The risk of pericarditis recurrence was significantly decreased by colchicine (RR 0.46, 95% CI 0.37-0.58) and anti-IL-1 agents (RR 0.13, 95% CI 0.03-0.54) compared to placebo or standard therapy. Colchicine significantly decreased the risk of treatment failure (RR 0.42, 95% CI 0.31-0.57) but did not have a significant impact on the risk of adverse events (RR 1.06, 95% CI 0.31-3.62). No significant risk of adverse events (RR 2.16, 95% CI 0.66-7.01) or serious adverse events (RR 1.01, 95% CI 0.23-4.41) was observed with anti-interleukin-1 agents. Colchicine was also associated with a decreased risk of pericarditis-related rehospitalization (RR 0.26, 95% CI 0.10-0.70). The network meta-analysis showed that anti-IL-1 agents (RR 0.13, 95% CI 0.05 to 0.30) were associated with a greater reduction in pericarditis recurrence than colchicine (RR 0.46, 95% CI 0.37 to 0.59). All anti-interleukin-1 agents significantly decreased the risk of pericarditis recurrence, with comparable efficacies among the different agents. Conclusion: Colchicine and anti-IL-1 agents significantly reduced the risk of pericarditis recurrence with the anti-IL-1 agents demonstrating greater efficacy. Further, high-powered, large-scale RCTs that directly compare various treatment options are needed to confirm or refute our findings.