Key clinical point: Compared with idelalisib+rituximab (R-idela), ibrutinib significantly prolonged survival and was associated with lower treatment discontinuation rates in patients with relapsed or refractory chronic lymphocytic leukemia (CLL) in routine practice.
Major finding: The ibrutinib vs R-idela group had significantly longer median progression-free survival (40.5 vs 22.0 months; hazard ratio [HR] 0.55; P < .001) and overall survival (54.4 vs 37.7 months; HR 0.73; P = .040) and lower rates of treatment discontinuation due to toxicity (22.5% vs 39.8%) and CLL progression (11.1% vs 27.5%).
Study details: This real-world retrospective study included 415 patients with relapsed or refractory CLL from the Chronic Lymphocytic Leukemia Patients Registry who received R-idela (n = 171) or ibrutinib (n = 244).
Disclosures: This study was funded by grants from the Ministry of Health, Czech Republic, and Programme Cooperation, Research Area ONCO. Some authors reported ties with various organizations.
Source: Spacek M et al for the Czech CLL Study Group. Idelalisib plus rituximab versus ibrutinib in the treatment of relapsed/refractory chronic lymphocytic leukaemia: A real-world analysis from the Chronic Lymphocytic Leukemia Patients Registry (CLLEAR). Br J Haematol. 2023 (Mar 27). Doi: 10.1111/bjh.18736