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NCT03275285 · OUTCOME

Progression Free Survival as Determined by Independent Response Committee [Event Censored if Occurred >8 Weeks From Last Disease Assessment]: Final 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 final analysis data cut-off date of 14 Jan 2022 (the median duration of follow-up was 43.96 months)

What was measured

Time (in months) from randomization to date of 1st documentation of PD/date of death from any cause, whichever comes 1st. If PD \& death are not observed before cut-off date/date of initiation of further anti-myeloma treatment, PFS was censored at date of last valid disease assessment not showing PD/cut-off date, whichever comes 1st. Progressions/deaths occurring \>8 weeks after last disease assessment were censored at earliest date of last valid disease assessment not showing PD before initiation of further anti-myeloma treatment \& cut-off date. PD (per IMWG criteria): meeting any 1 criteria: Inc of \>=25% in serum M-component from nadir; serum M component inc \>=1 g/dL in 2 consecutive assessment, if starting M component was \>=5 g/dL; and/or inc of \>=25% in urine M-component from nadir and/or development of new bone lesion/soft tissue extramedullary disease/inc \>=50% from nadir in sum of perpendicular diameters of existing soft tissue extramedullary disease lesion \>1 cm in short axis.

Analysis population: Analysis was performed on the 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: 208 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: 215 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)20.76Not reported16.16428.189Not reported
Isatuximab + Carfilzomib + Dexamethasone (IKd)41.66Not reported27.138NAUpper limit of the confidence interval could not be reached due to less number of participants with the events.

Source statistical analyses

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

  1. ci Lower Limit
    0.424
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95.4
    ci Upper Limit
    0.832
    estimate Comment
    Hazard Ratio was stratified on 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
    Hazard Ratio (HR)
    param Value
    0.594
Complete source fields
analyses
  1. ci Lower Limit
    0.424
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95.4
    ci Upper Limit
    0.832
    estimate Comment
    Hazard Ratio was stratified on 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
    Hazard Ratio (HR)
    param Value
    0.594
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        16.164
        upper Limit
        28.189
        value
        20.76
      2. comment
        Upper limit of the confidence interval could not be reached due to less number of participants with the events.
        group Id
        OG001
        lower Limit
        27.138
        upper Limit
        NA
        value
        41.66
denoms
  1. counts
    1. group Id
      OG000
      value
      123
    2. group Id
      OG001
      value
      179
    units
    Participants
description
Time (in months) from randomization to date of 1st documentation of PD/date of death from any cause, whichever comes 1st. If PD \& death are not observed before cut-off date/date of initiation of further anti-myeloma treatment, PFS was censored at date of last valid disease assessment not showing PD/cut-off date, whichever comes 1st. Progressions/deaths occurring \>8 weeks after last disease assessment were censored at earliest date of last valid disease assessment not showing PD before initiation of further anti-myeloma treatment \& cut-off date. PD (per IMWG criteria): meeting any 1 criteria: Inc of \>=25% in serum M-component from nadir; serum M component inc \>=1 g/dL in 2 consecutive assessment, if starting M component was \>=5 g/dL; and/or inc of \>=25% in urine M-component from nadir and/or development of new bone lesion/soft tissue extramedullary disease/inc \>=50% from nadir in sum of perpendicular diameters of existing soft tissue extramedullary disease lesion \>1 cm in short axis.
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: 208 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: 215 weeks).
    id
    OG001
    title
    Isatuximab + Carfilzomib + Dexamethasone (IKd)
param Type
MEDIAN
population Description
Analysis was performed on the ITT population. Analysis was performed by Kaplan-Meier method.
reporting Status
POSTED
time Frame
From randomization until the final analysis data cut-off date of 14 Jan 2022 (the median duration of follow-up was 43.96 months)
title
Progression Free Survival as Determined by Independent Response Committee [Event Censored if Occurred >8 Weeks From Last Disease Assessment]: Final Analysis
type
PRIMARY
unit Of Measure
months

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