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NCT03582033 · OUTCOME

DOR as Per the IMWG Uniform Response Criteria: Part C

A Safety Study of SEA-BCMA in Patients With Multiple Myeloma · Source last updated 2024-12-24

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

Measure
MEDIAN
Unit
Months
Interval / dispersion
Full Range
Time frame
From the first dose of study treatment until the first documented OR (sCR or CR or PR or VGPR) on or before the first documented PD or death or censoring date, whichever occurred first (maximum up to 37 months)

What was measured

DOR: Time from first documentation of OR(sCR,CR,VGPR/PR) to first documentation of PD/death due to any cause, whichever came first. PD: Objective evidence of tumor progression(TP) (based on serum, urine/BM assessments) \&/clinical progression/ investigator. sCR: CR, normal FLC ratio \& absence of clonal cells in bone marrow by IC/IF. CR: Negative immunofixation of serum\&urine, disappearance of any STP, \&\<5% plasma cells in bone marrow. VGPR: Serum \& UMP detectable by immunofixation but not on electrophoresis/ \>= 90% reduction(R) in SMP level+UMP level \<100 mg/24 hour, PR: \>=50%R of SMP \& R in 24-hour UMP by \>=90% or to \<200 mg/24 hour. DOR: censored on date of last disease assessment documenting absence of PD for participants who do not have PD \& were still on study at the time of an analysis/removed from study prior to documentation of TP. Participants started new antitumor treatment prior to documentation of PD were censored at last disease assessment prior to start of new treatment.

Analysis population: All treated participants analysis set included all treated participants who received any amount of SEA-BCMA. Here "Number of Participants Analyzed" signifies participants evaluable for this outcome measure.

Groups in this outcome

Part C: SEA-BCMA 1600mg and Dexamethasone

Participants received SEA-BCMA 1600 mg IV q2wk on Day 1 and 15 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.

Part C: SEA-BCMA 800mg and Dexamethasone

Participants received SEA-BCMA 800 mg IV q1wk on Day 1 and 15 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.

Part C: SEA-BCMA 1600 mg and Dexamethasone

Participants received SEA-BCMA 1600 mg IV q1wk on Day 1,8,15 and 22 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.

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

Analysis denominator · Participants

GroupSource count
Part C: SEA-BCMA 1600mg and Dexamethasone2
Part C: SEA-BCMA 800mg and Dexamethasone2
Part C: SEA-BCMA 1600 mg and Dexamethasone1

Reported measurements

Source class 1
Values in Months · Interval/dispersion: Full Range
GroupValueSpreadLowerUpperComment
Part C: SEA-BCMA 1600mg and DexamethasoneNANot reported4.635.7Median could not be calculated due to insufficient number of participants with events.
Part C: SEA-BCMA 800mg and DexamethasoneNANot reported1.922.6Median could not be calculated due to insufficient number of participants with events.
Part C: SEA-BCMA 1600 mg and Dexamethasone6.5Not reported6.56.5Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        Median could not be calculated due to insufficient number of participants with events.
        group Id
        OG000
        lower Limit
        4.6
        upper Limit
        35.7
        value
        NA
      2. comment
        Median could not be calculated due to insufficient number of participants with events.
        group Id
        OG001
        lower Limit
        1.9
        upper Limit
        22.6
        value
        NA
      3. group Id
        OG002
        lower Limit
        6.5
        upper Limit
        6.5
        value
        6.5
denoms
  1. counts
    1. group Id
      OG000
      value
      2
    2. group Id
      OG001
      value
      2
    3. group Id
      OG002
      value
      1
    units
    Participants
description
DOR: Time from first documentation of OR(sCR,CR,VGPR/PR) to first documentation of PD/death due to any cause, whichever came first. PD: Objective evidence of tumor progression(TP) (based on serum, urine/BM assessments) \&/clinical progression/ investigator. sCR: CR, normal FLC ratio \& absence of clonal cells in bone marrow by IC/IF. CR: Negative immunofixation of serum\&urine, disappearance of any STP, \&\<5% plasma cells in bone marrow. VGPR: Serum \& UMP detectable by immunofixation but not on electrophoresis/ \>= 90% reduction(R) in SMP level+UMP level \<100 mg/24 hour, PR: \>=50%R of SMP \& R in 24-hour UMP by \>=90% or to \<200 mg/24 hour. DOR: censored on date of last disease assessment documenting absence of PD for participants who do not have PD \& were still on study at the time of an analysis/removed from study prior to documentation of TP. Participants started new antitumor treatment prior to documentation of PD were censored at last disease assessment prior to start of new treatment.
dispersion Type
Full Range
groups
  1. description
    Participants received SEA-BCMA 1600 mg IV q2wk on Day 1 and 15 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.
    id
    OG000
    title
    Part C: SEA-BCMA 1600mg and Dexamethasone
  2. description
    Participants received SEA-BCMA 800 mg IV q1wk on Day 1 and 15 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.
    id
    OG001
    title
    Part C: SEA-BCMA 800mg and Dexamethasone
  3. description
    Participants received SEA-BCMA 1600 mg IV q1wk on Day 1,8,15 and 22 of each 28-day cycle, and dexamethasone 40 mg orally or as an IV infusion on Day 1, 8, 15, and 22 of each 28-day cycle. Participants received treatment until disease progression, unacceptable toxicity, withdrawal of consent, death, or study termination, whichever occurs first.
    id
    OG002
    title
    Part C: SEA-BCMA 1600 mg and Dexamethasone
param Type
MEDIAN
population Description
All treated participants analysis set included all treated participants who received any amount of SEA-BCMA. Here "Number of Participants Analyzed" signifies participants evaluable for this outcome measure.
reporting Status
POSTED
time Frame
From the first dose of study treatment until the first documented OR (sCR or CR or PR or VGPR) on or before the first documented PD or death or censoring date, whichever occurred first (maximum up to 37 months)
title
DOR as Per the IMWG Uniform Response Criteria: Part C
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice