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NCT04639219 · OUTCOME

Duration of Response (DoR) as Per RECIST v1.1 Using ICR and Investigator Assessment

A Study of T-DXd for the Treatment of Solid Tumors Harboring HER2 Activating Mutations · Source last updated 2026-03-23

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

Measure
MEDIAN
Unit
months
Interval / dispersion
Inter-Quartile Range
Time frame
Tumor scans performed at screening, then q6w +/- 1 week relative to the date of first treatment administration until RECIST v1.1 objective PD, withdrawal of consent, or death by any cause, up to DCO date of 25 Jan 2023 (approximately 24 months)

What was measured

DoR was defined as the time from the date of first documented response until date of documented progression or death in the absence of disease progression (date of progression-free survival \[PFS\] event or censoring - date of first response + 1). The DoR was calculated using Kaplan-Meier technique.

Analysis population: The FAS consisted of all participants who received at least 1 dose of study treatment. Participants with response were evaluated.

Groups in this outcome

T-DXd

Participants harboring tumors with specific HER2 activating mutations received T-DXd 5.4 mg/kg via IV infusion on Day 1 of each cycle (21 days), every 3 weeks until RECIST v1.1-defined PD, withdrawal of consent, or until any other of the discontinuation criteria 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-DXd102

Reported measurements

DoR by ICR

Analysis denominator · Participants

GroupSource count
T-DXd30
Values in months · Interval/dispersion: Inter-Quartile Range
GroupValueSpreadLowerUpperComment
T-DXdNANot reported6.8NANA indicates that median and upper limit of confidence interval (CI) were not estimable due to insufficient number of participants with events at study closure.
DoR by Investigator assessment

Analysis denominator · Participants

GroupSource count
T-DXd33
Values in months · Interval/dispersion: Inter-Quartile Range
GroupValueSpreadLowerUpperComment
T-DXd11.0Not reported6.918.1Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        NA indicates that median and upper limit of confidence interval (CI) were not estimable due to insufficient number of participants with events at study closure.
        group Id
        OG000
        lower Limit
        6.8
        upper Limit
        NA
        value
        NA
    denoms
    1. counts
      1. group Id
        OG000
        value
        30
      units
      Participants
    title
    DoR by ICR
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        6.9
        upper Limit
        18.1
        value
        11.0
    denoms
    1. counts
      1. group Id
        OG000
        value
        33
      units
      Participants
    title
    DoR by Investigator assessment
denoms
  1. counts
    1. group Id
      OG000
      value
      102
    units
    Participants
description
DoR was defined as the time from the date of first documented response until date of documented progression or death in the absence of disease progression (date of progression-free survival \[PFS\] event or censoring - date of first response + 1). The DoR was calculated using Kaplan-Meier technique.
dispersion Type
Inter-Quartile Range
groups
  1. description
    Participants harboring tumors with specific HER2 activating mutations received T-DXd 5.4 mg/kg via IV infusion on Day 1 of each cycle (21 days), every 3 weeks until RECIST v1.1-defined PD, withdrawal of consent, or until any other of the discontinuation criteria was met.
    id
    OG000
    title
    T-DXd
param Type
MEDIAN
population Description
The FAS consisted of all participants who received at least 1 dose of study treatment. Participants with response were evaluated.
reporting Status
POSTED
time Frame
Tumor scans performed at screening, then q6w +/- 1 week relative to the date of first treatment administration until RECIST v1.1 objective PD, withdrawal of consent, or death by any cause, up to DCO date of 25 Jan 2023 (approximately 24 months)
title
Duration of Response (DoR) as Per RECIST v1.1 Using ICR and Investigator Assessment
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice