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COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Comparative Effectiveness of Pegcetacoplan Versus Ravulizumab and Eculizumab in Complement Inhibitor-Naïve Patients with Paroxysmal Nocturnal Hemoglobinuria: A Matching-Adjusted Indirect Comparison.
Advances in Therapy 2023 April
INTRODUCTION: In the absence of head-to-head trials, this study compared treatment outcomes with the C3 complement inhibitor pegcetacoplan versus the C5 complement inhibitor eculizumab or ravulizumab in complement inhibitor-naïve patients with paroxysmal nocturnal hemoglobinuria (PNH).
METHODS: A matching-adjusted indirect comparison was conducted using individual patient data from the pegcetacoplan arm of the PRINCE trial (NCT04085601; n = 34) and aggregate data from the ravulizumab (n = 125) and eculizumab (n = 121) arms of the ALXN1210-PNH-301 trial (NCT03056040). Clinical and quality of life endpoints were evaluated after matching patients in the two trials on baseline characteristics. The weighted Wald test with 95% confidence interval was used to compare categorical and continuous variables (i.e., weighted chi-squared and z tests, respectively). Bias factor analysis was performed to quantify the extent of residual bias from unmeasured confounders.
RESULTS: After weighting, treatment with pegcetacoplan was associated with statistically significant improvements in most clinical endpoints compared with ravulizumab or eculizumab treatment. These included: greater absolute and percent reductions in lactate dehydrogenase (LDH) level and increase in hemoglobin level from baseline; shorter time to first occurrence of LDH normalization; larger proportions of patients achieving hemoglobin stabilization and avoiding transfusion, with fewer packed red blood cell units transfused; and a smaller proportion of patients experiencing breakthrough hemolysis (all p < 0.05). Patients receiving pegcetacoplan also had a greater increase in general health status score from baseline compared with those receiving C5 complement inhibitors.
CONCLUSION: Pegcetacoplan provides clinical benefits as first-line treatment for complement inhibitor-naïve patients with PNH.
TRIAL REGISTRATION: ClinicalTrials.gov identifier, NCT04085601.
METHODS: A matching-adjusted indirect comparison was conducted using individual patient data from the pegcetacoplan arm of the PRINCE trial (NCT04085601; n = 34) and aggregate data from the ravulizumab (n = 125) and eculizumab (n = 121) arms of the ALXN1210-PNH-301 trial (NCT03056040). Clinical and quality of life endpoints were evaluated after matching patients in the two trials on baseline characteristics. The weighted Wald test with 95% confidence interval was used to compare categorical and continuous variables (i.e., weighted chi-squared and z tests, respectively). Bias factor analysis was performed to quantify the extent of residual bias from unmeasured confounders.
RESULTS: After weighting, treatment with pegcetacoplan was associated with statistically significant improvements in most clinical endpoints compared with ravulizumab or eculizumab treatment. These included: greater absolute and percent reductions in lactate dehydrogenase (LDH) level and increase in hemoglobin level from baseline; shorter time to first occurrence of LDH normalization; larger proportions of patients achieving hemoglobin stabilization and avoiding transfusion, with fewer packed red blood cell units transfused; and a smaller proportion of patients experiencing breakthrough hemolysis (all p < 0.05). Patients receiving pegcetacoplan also had a greater increase in general health status score from baseline compared with those receiving C5 complement inhibitors.
CONCLUSION: Pegcetacoplan provides clinical benefits as first-line treatment for complement inhibitor-naïve patients with PNH.
TRIAL REGISTRATION: ClinicalTrials.gov identifier, NCT04085601.
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