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NCT03275285 · OUTCOME

Percentage of Participants With Overall Response (OR) as Determined by Independent Response Committee: Primary Analysis

Multinational Clinical Study Comparing Isatuximab, Carfilzomib And Dexamethasone To Carfilzomib And Dexamethasone In Relapse And/Or Refractory Multiple Myeloma Patients · Source last updated 2026-02-09

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
NUMBER
Unit
percentage of participants
Interval / dispersion
Not reported
Time frame
From randomization until the primary analysis data cut-off date of 7 Feb 2020 (the median duration of follow-up was 20.73 months)

What was measured

OR: participants with sCR, CR, VGPR \& partial response (PR) as best overall response assessed by IRC using IMWG response criteria (from start of treatment until disease progression, death, initiation of further anti-myeloma treatment/cutoff date, whichever occurs 1st). sCR: negative immunofixation on serum \& urine, disappearance of soft tissue plasmacytoma, \<5% plasma cells in bone marrow aspirate (BMA) + normal FLC ratio (0.26-1.65), absence of clonal cells in bone marrow biopsy. CR: negative immunofixation on serum \& urine, disappearance of soft tissue plasmacytoma, \<5% plasma cells in BMA. VGPR: serum \& urine M-protein detectable by immunofixation, not on electrophoresis/,\>=90% reduction in serum M-protein + urine M-protein level \<100mg/24h/,\>=90% decrease in SPD compared to baseline in soft tissue plasmacytoma. PR:\>=50% reduction of serum M-protein \& decrease in 24h urinary M-protein by \>=90%/\<200mg/24h, if present at baseline,\>=50% decrease in SPD of soft tissue plasmacytoma.

Analysis population: Analysis was performed on ITT population.

Groups in this outcome

Carfilzomib + Dexamethasone (Kd)

Participants received carfilzomib 20 mg/m\^2, IV infusion on Days 1, and 2 in Cycle 1, and then escalated to 56 mg/m\^2 on Days 8, 9, 15 and 16 of Cycle 1 and then on Days 1, 2, 8, 9, 15 and 16 of each subsequent 28-day treatment cycle along with dexamethasone 20 mg, PO or IV on Days 1, 2, 8, 9, 15, 16, 22 and 23 of each 28-day treatment cycle until disease progression or unacceptable adverse event or participant's decision to discontinue the study treatment or any other reason, whichever comes first (maximum exposure: 114 weeks).

Isatuximab + Carfilzomib + Dexamethasone (IKd)

Participants received isatuximab 10 mg/kg, IV infusion on Days 1, 8, 15 and 22 in Cycle 1, and then on Days 1 and Day 15 of each 28-day treatment cycle plus carfilzomib 20 mg/m\^2, IV on Days 1, and 2 in Cycle 1, and then escalated to 56 mg/m\^2 on Days 8, 9, 15 and 16 of Cycle 1 and then on Days 1, 2, 8, 9, 15 and 16 of each subsequent 28-day treatment cycle and dexamethasone 20 mg, PO or IV on Day 1, 2, 8, 9, 15, 16, 22 and 23 of each 28-day treatment cycle until disease progression or unacceptable adverse event or participant's decision to discontinue the study treatment or any other reason, whichever comes first (maximum exposure: 111 weeks).

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Carfilzomib + Dexamethasone (Kd)123
Isatuximab + Carfilzomib + Dexamethasone (IKd)179

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Carfilzomib + Dexamethasone (Kd)82.9Not reportedNot reportedNot reportedNot reported
Isatuximab + Carfilzomib + Dexamethasone (IKd)86.6Not reportedNot reportedNot reportedNot reported

Source statistical analyses

Group order, estimate direction, methods and comments are retained. No treatment ranking is inferred.

  1. group Description
    Statistical analysis for comparison of Overall Response between the Kd and IKd arms based on primary analysis.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    A closed test procedure was used to control the Type I error rate from the primary efficacy endpoints sequentially through the secondary efficacy endpoints. No further testing would be performed unless the significance level had been reached on PFS and testing on subsequent endpoints were continued only if the null hypothesis for the previously tested endpoint was rejected.
    non Inferiority Type
    SUPERIORITY
    p Value
    0.1930
    p Value Comment
    One-sided p-value based on Stratified Cochran-Mantel-Haenszel test. Threshold for statistical significance level at 0.025.
    statistical Comment
    One sided p-value was stratified based on randomization factors according to IRT.
    statistical Method
    Cochran-Mantel-Haenszel
Complete source fields
analyses
  1. group Description
    Statistical analysis for comparison of Overall Response between the Kd and IKd arms based on primary analysis.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    A closed test procedure was used to control the Type I error rate from the primary efficacy endpoints sequentially through the secondary efficacy endpoints. No further testing would be performed unless the significance level had been reached on PFS and testing on subsequent endpoints were continued only if the null hypothesis for the previously tested endpoint was rejected.
    non Inferiority Type
    SUPERIORITY
    p Value
    0.1930
    p Value Comment
    One-sided p-value based on Stratified Cochran-Mantel-Haenszel test. Threshold for statistical significance level at 0.025.
    statistical Comment
    One sided p-value was stratified based on randomization factors according to IRT.
    statistical Method
    Cochran-Mantel-Haenszel
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        82.9
      2. group Id
        OG001
        value
        86.6
denoms
  1. counts
    1. group Id
      OG000
      value
      123
    2. group Id
      OG001
      value
      179
    units
    Participants
description
OR: participants with sCR, CR, VGPR \& partial response (PR) as best overall response assessed by IRC using IMWG response criteria (from start of treatment until disease progression, death, initiation of further anti-myeloma treatment/cutoff date, whichever occurs 1st). sCR: negative immunofixation on serum \& urine, disappearance of soft tissue plasmacytoma, \<5% plasma cells in bone marrow aspirate (BMA) + normal FLC ratio (0.26-1.65), absence of clonal cells in bone marrow biopsy. CR: negative immunofixation on serum \& urine, disappearance of soft tissue plasmacytoma, \<5% plasma cells in BMA. VGPR: serum \& urine M-protein detectable by immunofixation, not on electrophoresis/,\>=90% reduction in serum M-protein + urine M-protein level \<100mg/24h/,\>=90% decrease in SPD compared to baseline in soft tissue plasmacytoma. PR:\>=50% reduction of serum M-protein \& decrease in 24h urinary M-protein by \>=90%/\<200mg/24h, if present at baseline,\>=50% decrease in SPD of soft tissue plasmacytoma.
groups
  1. description
    Participants received carfilzomib 20 mg/m\^2, IV infusion on Days 1, and 2 in Cycle 1, and then escalated to 56 mg/m\^2 on Days 8, 9, 15 and 16 of Cycle 1 and then on Days 1, 2, 8, 9, 15 and 16 of each subsequent 28-day treatment cycle along with dexamethasone 20 mg, PO or IV on Days 1, 2, 8, 9, 15, 16, 22 and 23 of each 28-day treatment cycle until disease progression or unacceptable adverse event or participant's decision to discontinue the study treatment or any other reason, whichever comes first (maximum exposure: 114 weeks).
    id
    OG000
    title
    Carfilzomib + Dexamethasone (Kd)
  2. description
    Participants received isatuximab 10 mg/kg, IV infusion on Days 1, 8, 15 and 22 in Cycle 1, and then on Days 1 and Day 15 of each 28-day treatment cycle plus carfilzomib 20 mg/m\^2, IV on Days 1, and 2 in Cycle 1, and then escalated to 56 mg/m\^2 on Days 8, 9, 15 and 16 of Cycle 1 and then on Days 1, 2, 8, 9, 15 and 16 of each subsequent 28-day treatment cycle and dexamethasone 20 mg, PO or IV on Day 1, 2, 8, 9, 15, 16, 22 and 23 of each 28-day treatment cycle until disease progression or unacceptable adverse event or participant's decision to discontinue the study treatment or any other reason, whichever comes first (maximum exposure: 111 weeks).
    id
    OG001
    title
    Isatuximab + Carfilzomib + Dexamethasone (IKd)
param Type
NUMBER
population Description
Analysis was performed on ITT population.
reporting Status
POSTED
time Frame
From randomization until the primary analysis data cut-off date of 7 Feb 2020 (the median duration of follow-up was 20.73 months)
title
Percentage of Participants With Overall Response (OR) as Determined by Independent Response Committee: Primary Analysis
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice