Abstract
Background: In the phase 3 ALPINE trial (BGB-3111-305; NCT03734016), efficacy and safety of zanubrutinib, a highly selective, next-generation Bruton tyrosine kinase inhibitor (BTKi), were compared with the first-generation BTKi, ibrutinib, in adult patients with RR chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL). Aims: This abstract, based on the interim analysis of the ALPINE trial, describes the effects of zanubrutinib monotherapy and ibrutinib monotherapy on the health-related quality of life (HRQoL). Methods: Health-related quality of life was examined by patient-reported outcomes (PROs) measures assessed by EORTC QLQ-C30 and EQ-5D-5L at baseline, Cycle 1, and then every 3rd cycle until end of treatment. Key PRO endpoints included global health status (GHS), physical and role functions, and fatigue, pain, diarrhea, and nausea/vomiting. Descriptive analysis on all the scales was conducted as was a mixed model repeated-measure (MMRM) analysis of the longitudinal QLQ-C30 data. Data presented are from key cycles (7 and 13), corresponding to 6 and 12 months of treatment, respectively. Results: In the intent-to-treat population (N=652; zanubrutinib, n=327; ibrutinib, n=325), adjusted completion rates were high (>85%) in both arms at Cycles 7 and 13. On the QLQ-C30, estimated mean treatment differences and 95% CI in key PRO endpoints demonstrated treatment differences, in favor of zanubrutinib, in GHS, physical functioning, and fatigue in Cycle 7, and diarrhea in Cycle 13 (Table). Mean change from baseline (SD) in EQ-5D-5L VAS showed consistently more improvement with zanubrutinib compared with ibrutinib at both Cycle 7 (8.4 [18.2] vs 4.0 [16.6]) and Cycle 13 (6.8 [18.8] vs 5.2 [17.5]). Image:Summary/Conclusion: In the ALPINE trial, patients with RR CLL/SLL who received zanubrutinib monotherapy reported improvements in key HRQoL endpoints compared with patients who received ibrutinib monotherapy.
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