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NCT04494425 · OUTCOME

Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (TESAEs)

Study of Trastuzumab Deruxtecan (T-DXd) vs Investigator's Choice Chemotherapy in HER2-low, Hormone Receptor Positive, Metastatic Breast Cancer · Source last updated 2026-03-04

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

Measure
COUNT_OF_PARTICIPANTS
Unit
Participants
Interval / dispersion
Not reported
Time frame
From first dose of study drug (Day 1) up to PCD of 18 March 2024 (maximum of approximately 43.85 months)

What was measured

An adverse event (AE) was any untoward medical occurrence in a participant or clinical study participant administered a medicinal product and which did not necessarily had a causal relationship with this treatment. A serious adverse event (SAE) was an AE occurring during any study phase, that fulfilled 1 or more of following criteria: resulted in death, was immediately life-threatening, required in-participant hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability or incapacity, was congenital abnormality or birth defect, and was an important medical event that jeopardized participant or required medical treatment to prevent 1 of outcomes listed above. TEAE was any AE that occurred, having been absent before the first dose of study drug, or had worsened in severity or seriousness after initiation of the study drug until the 40-day (+7 days) safety follow-up visit.

Analysis population: The Safety population included all participants who received at least 1 dose of study drug.

Groups in this outcome

T-DXd

Participants received T-DXd 5.4 mg/kg via IV infusion every 3 weeks until PD, unacceptable toxicity, withdrawal of consent, or another criterion for discontinuation was met.

Chemotherapy

Participants received Investigator's choice single-agent chemotherapy (capecitabine 1000 or 1250 mg/m\^2 orally twice daily for 2 weeks followed by a 1-week rest period in 3-week cycles, paclitaxel 80 mg/m\^2 via IV infusion qw in 3-week cycles or nab-paclitaxel 100 mg/m\^2 via IV infusion qw for 3 weeks followed by 1-week rest period in 4-week cycles) until PD, unacceptable toxicity, withdrawal of consent, or another criterion for discontinuation was met.

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

Analysis denominator · Participants

GroupSource count
T-DXd434
Chemotherapy417

Reported measurements

TEAEs
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T-DXd429Not reportedNot reportedNot reportedNot reported
Chemotherapy397Not reportedNot reportedNot reportedNot reported
TESAEs
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T-DXd88Not reportedNot reportedNot reportedNot reported
Chemotherapy67Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        429
      2. group Id
        OG001
        value
        397
    title
    TEAEs
  2. categories
    1. measurements
      1. group Id
        OG000
        value
        88
      2. group Id
        OG001
        value
        67
    title
    TESAEs
denoms
  1. counts
    1. group Id
      OG000
      value
      434
    2. group Id
      OG001
      value
      417
    units
    Participants
description
An adverse event (AE) was any untoward medical occurrence in a participant or clinical study participant administered a medicinal product and which did not necessarily had a causal relationship with this treatment. A serious adverse event (SAE) was an AE occurring during any study phase, that fulfilled 1 or more of following criteria: resulted in death, was immediately life-threatening, required in-participant hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability or incapacity, was congenital abnormality or birth defect, and was an important medical event that jeopardized participant or required medical treatment to prevent 1 of outcomes listed above. TEAE was any AE that occurred, having been absent before the first dose of study drug, or had worsened in severity or seriousness after initiation of the study drug until the 40-day (+7 days) safety follow-up visit.
groups
  1. description
    Participants received T-DXd 5.4 mg/kg via IV infusion every 3 weeks until PD, unacceptable toxicity, withdrawal of consent, or another criterion for discontinuation was met.
    id
    OG000
    title
    T-DXd
  2. description
    Participants received Investigator's choice single-agent chemotherapy (capecitabine 1000 or 1250 mg/m\^2 orally twice daily for 2 weeks followed by a 1-week rest period in 3-week cycles, paclitaxel 80 mg/m\^2 via IV infusion qw in 3-week cycles or nab-paclitaxel 100 mg/m\^2 via IV infusion qw for 3 weeks followed by 1-week rest period in 4-week cycles) until PD, unacceptable toxicity, withdrawal of consent, or another criterion for discontinuation was met.
    id
    OG001
    title
    Chemotherapy
param Type
COUNT_OF_PARTICIPANTS
population Description
The Safety population included all participants who received at least 1 dose of study drug.
reporting Status
POSTED
time Frame
From first dose of study drug (Day 1) up to PCD of 18 March 2024 (maximum of approximately 43.85 months)
title
Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (TESAEs)
type
SECONDARY
unit Of Measure
Participants

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Preserved source evidence · Not medical advice