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NCT03523585 · OUTCOME

Overall Survival (OS) in Participants With HER2-positive, Unresectable and/or Metastatic Breast Cancer Participants Previously Treated With Trastuzumab Emtansine

DS-8201a in Pre-treated HER2 Breast Cancer That Cannot be Surgically Removed or Has Spread [DESTINY-Breast02] · Source last updated 2026-02-27

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
Baseline up to 46 months postdose

What was measured

Overall survival (OS) was defined as the time from the date of randomization to the date of death due to any cause. If there is no death reported for a subject before the data cutoff for OS analysis, OS will be censored at the last contact date at which the subject is known to be alive.

Analysis population: Overall survival (OS) was assessed in the Full Analysis Set at data cut-off date of 30 Jun 2022.

Groups in this outcome

Trastuzumab Deruxtecan (T-DXd)

Participants with HER2 positive, unresectable and/or metastatic breast cancer participants previously treated with standard of care HER2 therapies, including ado-trastuzumab emtansine (T-DM1), who received T-DXd as a sterile intravenous (IV) solution at a dose of 5.4 mg/kg every 3 weeks (Q3W).

Treatment of Investigator's/Physician's Choice (TPC)

Participants with HER2 positive, unresectable and/or metastatic breast cancer participants previously treated with standard of care HER2 therapies, including ado-trastuzumab emtansine (T-DM1), who received investigator's choice treatment, Trastuzumab/Capecitabine or Lapatinib/Capecitabine.

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

Analysis denominator · Participants

GroupSource count
Trastuzumab Deruxtecan (T-DXd)406
Treatment of Investigator's/Physician's Choice (TPC)202

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Trastuzumab Deruxtecan (T-DXd)39.2Not reported32.7NAUpper limit of 95% Confidence Interval (CI) was not estimable due to insufficient number of events.
Treatment of Investigator's/Physician's Choice (TPC)26.5Not reported21.0NAUpper limit of 95% Confidence Interval (CI) was not estimable due to insufficient number of events.

Source statistical analyses

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

  1. ci Lower Limit
    0.5023
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.8605
    estimate Comment
    Hazard Ratio based on stratified Cox proportional hazards model with stratification factors: hormone receptor status, prior treatment with pertuzumab, and history of visceral disease, as defined by the IXRS.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0021
    p Value Comment
    Stratified Log-rank p-value
    param Type
    Hazard Ratio (HR)
    param Value
    0.6575
    statistical Comment
    p value based on log-rank stratified by hormone receptor status, prior treatment with pertuzumab, and history of visceral disease, as defined by IXRS
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.5023
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.8605
    estimate Comment
    Hazard Ratio based on stratified Cox proportional hazards model with stratification factors: hormone receptor status, prior treatment with pertuzumab, and history of visceral disease, as defined by the IXRS.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0021
    p Value Comment
    Stratified Log-rank p-value
    param Type
    Hazard Ratio (HR)
    param Value
    0.6575
    statistical Comment
    p value based on log-rank stratified by hormone receptor status, prior treatment with pertuzumab, and history of visceral disease, as defined by IXRS
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. comment
        Upper limit of 95% Confidence Interval (CI) was not estimable due to insufficient number of events.
        group Id
        OG000
        lower Limit
        32.7
        upper Limit
        NA
        value
        39.2
      2. comment
        Upper limit of 95% Confidence Interval (CI) was not estimable due to insufficient number of events.
        group Id
        OG001
        lower Limit
        21.0
        upper Limit
        NA
        value
        26.5
denoms
  1. counts
    1. group Id
      OG000
      value
      406
    2. group Id
      OG001
      value
      202
    units
    Participants
description
Overall survival (OS) was defined as the time from the date of randomization to the date of death due to any cause. If there is no death reported for a subject before the data cutoff for OS analysis, OS will be censored at the last contact date at which the subject is known to be alive.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants with HER2 positive, unresectable and/or metastatic breast cancer participants previously treated with standard of care HER2 therapies, including ado-trastuzumab emtansine (T-DM1), who received T-DXd as a sterile intravenous (IV) solution at a dose of 5.4 mg/kg every 3 weeks (Q3W).
    id
    OG000
    title
    Trastuzumab Deruxtecan (T-DXd)
  2. description
    Participants with HER2 positive, unresectable and/or metastatic breast cancer participants previously treated with standard of care HER2 therapies, including ado-trastuzumab emtansine (T-DM1), who received investigator's choice treatment, Trastuzumab/Capecitabine or Lapatinib/Capecitabine.
    id
    OG001
    title
    Treatment of Investigator's/Physician's Choice (TPC)
param Type
MEDIAN
population Description
Overall survival (OS) was assessed in the Full Analysis Set at data cut-off date of 30 Jun 2022.
reporting Status
POSTED
time Frame
Baseline up to 46 months postdose
title
Overall Survival (OS) in Participants With HER2-positive, Unresectable and/or Metastatic Breast Cancer Participants Previously Treated With Trastuzumab Emtansine
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice