Efficacy, Safety, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Ravulizumab in Chinese Adults Participants With Paroxysmal Nocturnal Hemoglobinuria (PNH)

LDH is an indicator of intravascular hemolysis that occurs in participants with paroxysmal nocturnal hemoglobinuria. A decrease in LDH indicated reduction (improvement) in hemolysis. Baseline was defined as the average of all available on-study assessments prior to the first dose of study drug. The percent change in LDH was analyzed using a mixed-effect model for repeated measures (MMRM) with the fixed categorical effect of visit, fixed continuous effect of the LDH baseline value as covariates, and participant as random effect.

LDH is an indicator of intravascular hemolysis that occurs in participants with paroxysmal nocturnal hemoglobinuria. A decrease in LDH indicated reduction (improvement) in hemolysis. Baseline was defined as the average of all available on-study assessments prior to the first dose of study drug.

Transfusion avoidance was defined as the percentage of participants who remained transfusion free and did not require a transfusion per protocol-specified guidelines (hemoglobin value of ≤9 grams (g)/deciliter (dL) with signs or symptoms of sufficient severity to warrant a transfusion, or a hemoglobin value of ≤7 g/dL regardless of presence of clinical signs or symptoms) through Day 183.

Breakthrough hemolysis was defined as at least one new or worsening symptom or sign of intravascular hemolysis (fatigue, hemoglobinuria, abdominal pain, dyspnea, anemia [hemoglobin <10 g/dL], major adverse vascular event [including thrombosis], dysphagia, or erectile dysfunction) in the presence of elevated LDH ≥2 times the ULN.

The FACIT-Fatigue is a 13-item questionnaire that assesses self-reported fatigue and its impact upon daily activities and function over the preceding 7 days. Participants scored each item on a 5-point scale: 0 (Not at all) to 4 (Very much). Total scores range from 0 to 52, with a higher score indicating better quality of life. Analysis was using a mixed-effect model for repeated measures (MMRM) with the fixed categorical effect of visit, fixed continuous effect of the baseline value of FACIT-Fatigue score as covariates, and participant as random effect.

Analysis was performed using MMRM with the fixed categorical effect of visit, fixed continuous effect of the Hgb baseline value as covariates, and participant as random effect.