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NCT03275285 · OUTCOME

Time to Best Response: 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
MEDIAN
Unit
months
Interval / dispersion
95% Confidence Interval
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

Time to best response was defined as time (in months) from randomization to the date of first occurrence of IRC determined as best overall response (PR or better) that is subsequently confirmed. In absence of response, participants were censored at earliest date of last valid disease assessment before disease progression/death, date of last valid disease assessment before initiation of further anti-myeloma treatment (if any)/ analysis cut-off date, whichever was 1st. PR (IMWG criteria) was defined as \>=50% reduction of serum M-protein and reduction in 24 hours urinary M-protein by \>=90% or to \<200 mg/24 h. In addition to above listed criteria, if present at baseline, a \>=50% reduction in the size (SPD) of soft tissue plasmacytomas was also required. Best Overall Response was defined as the best response, using the IRC's assessment of response, from start of treatment until disease progression, death, initiation of further anti-myeloma treatment or cut-off date, whichever occurs 1st.

Analysis population: Analysis was performed on ITT population. Analysis was performed by Kaplan-Meier method.

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 months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Carfilzomib + Dexamethasone (Kd)3.78Not reported2.8584.172Not reported
Isatuximab + Carfilzomib + Dexamethasone (IKd)4.60Not reported3.8115.257Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.740
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.233
    estimate Comment
    Stratification was done on the number of prior lines of therapy (1 vs. \>1) and R-ISS stage (I or II vs. III vs. not classified) according to IRT.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    param Type
    Stratified Hazard Ratio
    param Value
    0.955
Complete source fields
analyses
  1. ci Lower Limit
    0.740
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.233
    estimate Comment
    Stratification was done on the number of prior lines of therapy (1 vs. \>1) and R-ISS stage (I or II vs. III vs. not classified) according to IRT.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    param Type
    Stratified Hazard Ratio
    param Value
    0.955
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        2.858
        upper Limit
        4.172
        value
        3.78
      2. group Id
        OG001
        lower Limit
        3.811
        upper Limit
        5.257
        value
        4.60
denoms
  1. counts
    1. group Id
      OG000
      value
      123
    2. group Id
      OG001
      value
      179
    units
    Participants
description
Time to best response was defined as time (in months) from randomization to the date of first occurrence of IRC determined as best overall response (PR or better) that is subsequently confirmed. In absence of response, participants were censored at earliest date of last valid disease assessment before disease progression/death, date of last valid disease assessment before initiation of further anti-myeloma treatment (if any)/ analysis cut-off date, whichever was 1st. PR (IMWG criteria) was defined as \>=50% reduction of serum M-protein and reduction in 24 hours urinary M-protein by \>=90% or to \<200 mg/24 h. In addition to above listed criteria, if present at baseline, a \>=50% reduction in the size (SPD) of soft tissue plasmacytomas was also required. Best Overall Response was defined as the best response, using the IRC's assessment of response, from start of treatment until disease progression, death, initiation of further anti-myeloma treatment or cut-off date, whichever occurs 1st.
dispersion Type
95% Confidence Interval
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
MEDIAN
population Description
Analysis was performed on ITT population. Analysis was performed by Kaplan-Meier method.
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
Time to Best Response: Primary Analysis
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice