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Observational Study
. 2025 Feb;104(2):1177-1186.
doi: 10.1007/s00277-025-06240-1. Epub 2025 Feb 15.

Real-world evidence of Carfilzomib, Lenalidomide and Dexamethasone (KRD) Scheme in patients with relapsed / refractory multiple myeloma

Affiliations
Observational Study

Real-world evidence of Carfilzomib, Lenalidomide and Dexamethasone (KRD) Scheme in patients with relapsed / refractory multiple myeloma

Antoni Garcia-Guiñon et al. Ann Hematol. 2025 Feb.

Abstract

Carfilzomib, lenalidomide and dexamethasone (KRd) is still a widely used treatment option for patients with relapsed / refractory multiple myeloma (RRMM). However, there is limited real-world evidence. Here we evaluated the efficacy and safety of KRd in patients with RRMM treated following the standard clinical practice of the hospitals in the Catalan region. This was a retrospective, observational study. The objective response rate (ORR) according to IMWG criteria was the primary endpoint. Secondary endpoints included progression-free survival (PFS) and overall survival (OS). The study planned to include at least 100-150 patients. In total 194 patients were included. Median age was 64 years (range: 40-88) and 56% were male. All patients had received bortezomib. Additionally, 89 patients (46%) had received thalidomide and 29 (15%) lenalidomide. The ORR was 73% (95% CI: 66-79), with 72 patients (37%) having ≥ CR. The ORR was influenced by ISS score, number of previous treatments and exposure to lenalidomide. The median PFS was 26 months and 2-years OS rate 70%. The ISS stage and LDH levels were independent prognostic factors of survival. In conclusion, the KRd scheme led to a good effectiveness comparable safety profile to the phase III clinical trial in patients with RRMM.

Keywords: Carfilzomib, lenalidomide and dexamethasone; Real-world; Relapsed/refractory multiple myeloma.

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Conflict of interest statement

Declarations. Competing interests: CFL: Advisory boards: Janssen, BMS, Amgen, Pfizer, Sanofi, Beigene, GSK, Roche, Menarini; Honoraria: Amgen, Janssen, BMS, GSK, Sanofi, Pfizer, Beigene; Grants: BMS, Janssen, Amgen, GSK.EC: Advisory boards and honoraria: Janssen, Sanofi, GSK, Menarini, Amgen.CM: Advisory boards: Sanofi.YG: Janssen and Sanofi.The remaining co-authors have no competing interests.

Figures

Fig. 1
Fig. 1
Response rates to KRd. A Stacked bar graph illustrating the rate of sCR, CR, VGPR and PR in 194 patients included. B Forest plot illustrating with blue squares the ORR in patients subgroups. Whiskers indicate 95% CIs. C Swimmer plot showing responses over time in 141 patients who had a response to KRd scheme. Abbreviations: CR: complete response; CrCl: creatinine clearance; IMID: Immunomodulatory drug; ISS: International Staging System; LDH: lactate dehydrogenase; ORR: objective response rate; PR: partial response; R: lenalidomide treatment; sCR: stringent complete response; T: Thalidomide treatment; VGPR: very good partial response
Fig. 2
Fig. 2
PFS with KRd scheme in the real-world. A PFS in the overall population (blue line) with its 95% CI (blue shaded area). The dotted line indicates the 50% PFS probability. B Forest plot showing the correlation of baseline patients characteristics and PFS. Blue squares represent the hazard ratio of the subgroup with respect to the reference (ref) subgroup and whiskers indicate 95% CIs. Characteristics and values with white background correspond to the univariable analysis. The characteristics which show highest correlation with PFS in the univariable preliminary analysis are used to construct a multivariable model (shown with a grey background within the forest plot). Abbreviations: ASCT: autologous stem cell transplant; CrCl: creatinine clearance; IMID: Immunomodulatory drug; ISS: International Staging System; LDH: lactate dehydrogenase; PFS: progression-free survival; R: lenalidomide treatment; Ref: reference group; T: Thalidomide treatment
Fig. 3
Fig. 3
OS with KRd scheme in the real-world. A OS in the overall population (blue line) with its 95% CI (blue shaded area). The dotted line indicates the 50% OS probability. B Forest plot showing the correlation of baseline patients characteristics and OS. Blue squares represent the hazard ratio of the subgroup with respect to the reference (ref) subgroup and whiskers indicate 95% CIs. Characteristics and values with white background correspond to the univariable analysis. The characteristics which show highest correlation with OS in the univariable preliminary analysis are used to construct a multivariable model (shown with a grey background within the forest plot). Abbreviations: ASCT: autologous stem cell transplant; CrCl: creatinine clearance; IMID: Immunomodulatory drug; ISS: International Staging System; LDH: lactate dehydrogenase; OS: overall survival; R: lenalidomide treatment; Ref: reference group; T: Thalidomide treatment
Fig. 4
Fig. 4
Treatment-emergent adverse events with KRd in the real-world. The bar shows the percentage of patients with events grade 1-2 (light red) and grade 3-5 (dark red). The numbers within the bars show the number of patients who experienced the corresponding adverse event

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