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NCT04649359 · OUTCOME

Objective Response Rate (ORR) by Blinded Independent Central Review (BICR) as Per International Myeloma Working Group (IMWG) Criteria

MagnetisMM-3: Study Of Elranatamab (PF-06863135) Monotherapy in Participants With Multiple Myeloma Who Are Refractory to at Least One PI, One IMiD and One Anti-CD38 mAb · Source last updated 2026-05-19

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
95% Confidence Interval
Time frame
From date of first dose until confirmed disease progression, death, start of new anticancer therapy, whichever occurred first (up to approximately 16 months)

What was measured

ORR: % of participants with best overall response of confirmed stringent complete response (sCR), CR, very good partial response (VGPR) or PR per IMWG criteria. sCR: CR \& normal serum free light chain (sFLC) ratio \& absence of clonal cells in BMB/BMA by IH, IF, or flow cytometry. CR: negative immunofixation on serum \& urine, disappearance of any soft tissue plasmacytoma \& \<5% plasma cells in BMA, if disease measurable by sFLC only, preceding criteria plus normal sFLC ratio. VGPR: Serum \& urine M-protein detectable by immunofixation but not on electrophoresis; or \>=90% reduction in serum M-protein \& urine M-protein level \<100mg/24h. PR: \>=50% reduction in serum M-protein \& reduction in 24h urinary M-protein by \>=90% or \<200 mg/24h. If serum \& urine M-protein were unmeasurable, VGPR \& PR: \>=90% \& \>=50% decrease in difference respectively between involved \& uninvolved sFLC levels \& if present at baseline, \>=90% \& \>=50% reduction in soft tissue plasmacytomas' size.

Analysis population: Safety analysis set in each cohort included all enrolled participants in the respective cohort who received at least one dose of study intervention.

Groups in this outcome

Cohort A

BCMA-naïve participants received subcutaneous elranatamab with a priming regimen of 12 milligrams (mg) on Cycle 1 Day 1 and 32 mg on Cycle 1 Day 4 followed by 76 mg weekly thereafter starting from Cycle 1 Day 8.

Cohort B

BCMA-exposed participants received subcutaneous elranatamab with a priming regimen of 12 milligrams (mg) on Cycle 1 Day 1 and 32 mg on Cycle 1 Day 4 followed by 76 mg weekly thereafter starting from Cycle 1 Day 8.

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

Analysis denominator · Participants

GroupSource count
Cohort A123
Cohort B64

Reported measurements

Source class 1
Values in Percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Cohort A61.0Not reported51.869.6Not reported
Cohort B34.4Not reported22.947.3Not reported

Source statistical analyses

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

  1. group Description
    Null hypothesis of ORR by BICR for cohort A was 30%.
    group Ids
    1. OG000
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    statistical Method
    Exact binominal
  2. group Description
    Null hypothesis of ORR by BICR for cohort B was 15%.
    group Ids
    1. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    statistical Method
    Exact binominal
Complete source fields
analyses
  1. group Description
    Null hypothesis of ORR by BICR for cohort A was 30%.
    group Ids
    1. OG000
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    statistical Method
    Exact binominal
  2. group Description
    Null hypothesis of ORR by BICR for cohort B was 15%.
    group Ids
    1. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    statistical Method
    Exact binominal
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        51.8
        upper Limit
        69.6
        value
        61.0
      2. group Id
        OG001
        lower Limit
        22.9
        upper Limit
        47.3
        value
        34.4
denoms
  1. counts
    1. group Id
      OG000
      value
      123
    2. group Id
      OG001
      value
      64
    units
    Participants
description
ORR: % of participants with best overall response of confirmed stringent complete response (sCR), CR, very good partial response (VGPR) or PR per IMWG criteria. sCR: CR \& normal serum free light chain (sFLC) ratio \& absence of clonal cells in BMB/BMA by IH, IF, or flow cytometry. CR: negative immunofixation on serum \& urine, disappearance of any soft tissue plasmacytoma \& \<5% plasma cells in BMA, if disease measurable by sFLC only, preceding criteria plus normal sFLC ratio. VGPR: Serum \& urine M-protein detectable by immunofixation but not on electrophoresis; or \>=90% reduction in serum M-protein \& urine M-protein level \<100mg/24h. PR: \>=50% reduction in serum M-protein \& reduction in 24h urinary M-protein by \>=90% or \<200 mg/24h. If serum \& urine M-protein were unmeasurable, VGPR \& PR: \>=90% \& \>=50% decrease in difference respectively between involved \& uninvolved sFLC levels \& if present at baseline, \>=90% \& \>=50% reduction in soft tissue plasmacytomas' size.
dispersion Type
95% Confidence Interval
groups
  1. description
    BCMA-naïve participants received subcutaneous elranatamab with a priming regimen of 12 milligrams (mg) on Cycle 1 Day 1 and 32 mg on Cycle 1 Day 4 followed by 76 mg weekly thereafter starting from Cycle 1 Day 8.
    id
    OG000
    title
    Cohort A
  2. description
    BCMA-exposed participants received subcutaneous elranatamab with a priming regimen of 12 milligrams (mg) on Cycle 1 Day 1 and 32 mg on Cycle 1 Day 4 followed by 76 mg weekly thereafter starting from Cycle 1 Day 8.
    id
    OG001
    title
    Cohort B
param Type
NUMBER
population Description
Safety analysis set in each cohort included all enrolled participants in the respective cohort who received at least one dose of study intervention.
reporting Status
POSTED
time Frame
From date of first dose until confirmed disease progression, death, start of new anticancer therapy, whichever occurred first (up to approximately 16 months)
title
Objective Response Rate (ORR) by Blinded Independent Central Review (BICR) as Per International Myeloma Working Group (IMWG) Criteria
type
PRIMARY
unit Of Measure
Percentage of participants

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