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Network Meta-Analysis of Pharmacological Therapies for Long-Term Prophylactic Treatment of Patients with Hereditary
Sarah Walsh1, Meaghan Bartlett1, Elizabeth M Salvo-Halloran1
1EVERSANA, 113-3228 South Service Road, Burlington, Ontario L7N 3H8, Canada.
Background And Objectives:
Several treatments for long-term prophylaxis (LTP) of hereditary angioedema (HAE) are in clinical use, such as garadacimab, lanadelumab, subcutaneous C1 esterase inhibitor (C1INH), and berotralstat. In the absence of head-to-head comparative evidence, indirect comparison methods are needed to compare LTP treatments in patients with HAE. The objective of this analysis was to estimate the comparative efficacy, safety, and impact on quality of life of LTP treatments for patients with HAE through NMAs.
Methods:
A systematic literature review was conducted to identify randomized controlled trials (RCTs) investigating LTP treatments in patients (at least 12 years old) with HAE (PROSPERO protocol #CRD42022359207). A network meta-analysis (NMA) feasibility assessment evaluated trial suitability and Bayesian NMAs were conducted for evaluable efficacy, safety, and quality of life (QoL) outcomes.
Results:
The results of these NMAs show improved efficacy, QoL, and reduced rate of adverse events with garadacimab (200 mg once monthly), lanadelumab (300 mg every two or four weeks), subcutaneous C1INH (60 IU/kg twice weekly), and berotralstat (150 mg once daily) compared to placebo in the treatment of patients with HAE. For the primary outcome of time-normalized number of HAE attacks, garadacimab statistically significantly reduced the rate of attacks compared to lanadelumab Q4W and berotralstat. A similar statistically significant reduction was shown for HAE attacks treated with on-demand treatment. Garadacimab showed statistically significant reduction in the rate of moderate and/or severe HAE attacks compared to lanadelumab Q2W. Garadacimab also showed statistical improvements in change from baseline in AE-QoL total score as compared to berotralstat.
Conclusions:
Overall, garadacimab ranked as the most probable effective treatment among all comparators assessed, with lanadelumab Q2W or subcutaneous C1INH ranking second, across most outcomes.
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