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NCT05654623 · OUTCOME

Clinical Benefit Rate (CBR) by BICR Assessment

A Study to Learn About a New Medicine Called Vepdegestrant (ARV-471, PF-07850327) in People Who Have Advanced Metastatic Breast Cancer · Source last updated 2026-03-18

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 randomization until PD, death due to any cause or start of new anticancer therapy, whichever occurred first (up to 18.56 months and 19.38 months of treatment exposure for vepdegestrant and fulvestrant arms respectively)

What was measured

CBR: percentage of participants with clinical benefit response. Clinical benefit response: confirmed CR or PR at any time, or stable disease (SD) \>=24 weeks per RECIST v1.1. CR: complete disappearance of all target lesions, of all non-target lesions and no new lesions; except for nodal disease, all nodes decreased to normal (short axis \<10 mm); all disease sites, all target lesions assessed. PR: \>=30% decrease from baseline in sum of diameters of all target lesions, non-PD/not evaluated for non-target lesions and no new lesions; all target lesions assessed. SD: did not qualify for CR, PR, PD. All target lesions assessed. PD per RECIST v1.1: at least 20% increased sum of diameters of target measurable lesions above nadir (smallest sum observed considering baseline and all assessments prior to timepoint under evaluation), with minimum absolute increase of 5mm relative to nadir or unequivocal progression of existing non-target lesions, or new lesions.

Analysis population: FAS included all enrolled participants who were randomized. Here, "Overall Number of Participants Analyzed" signifies number of participants evaluable for this outcome measure.

Groups in this outcome

Vepdegestrant

Participants were randomized to receive vepdegestrant 200 mg orally, once daily on Days 1 to 28 of each 28-day cycle. Participants continued to receive assigned treatment until objective disease progression, unacceptable toxicity, death, participant refused further treatment, or one of the other reasons for treatment discontinuation per protocol was met.

Fulvestrant

Participants were randomized to receive fulvestrant 500 mg, intramuscularly (injection) on Days 1 and 15 of Cycle 1 and then on Day 1 of each cycle starting from Cycle 2 Day 1, where 1 cycle = 28 days. Participants continued to receive assigned treatment until objective disease progression, unacceptable toxicity, death, participant refused further treatment, or one of the other reasons for treatment discontinuation per protocol 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
Vepdegestrant274
Fulvestrant272

Reported measurements

Source class 1
Values in Percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Vepdegestrant34.3Not reported28.940.1Not reported
Fulvestrant28.7Not reported23.634.3Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        28.9
        upper Limit
        40.1
        value
        34.3
      2. group Id
        OG001
        lower Limit
        23.6
        upper Limit
        34.3
        value
        28.7
denoms
  1. counts
    1. group Id
      OG000
      value
      274
    2. group Id
      OG001
      value
      272
    units
    Participants
description
CBR: percentage of participants with clinical benefit response. Clinical benefit response: confirmed CR or PR at any time, or stable disease (SD) \>=24 weeks per RECIST v1.1. CR: complete disappearance of all target lesions, of all non-target lesions and no new lesions; except for nodal disease, all nodes decreased to normal (short axis \<10 mm); all disease sites, all target lesions assessed. PR: \>=30% decrease from baseline in sum of diameters of all target lesions, non-PD/not evaluated for non-target lesions and no new lesions; all target lesions assessed. SD: did not qualify for CR, PR, PD. All target lesions assessed. PD per RECIST v1.1: at least 20% increased sum of diameters of target measurable lesions above nadir (smallest sum observed considering baseline and all assessments prior to timepoint under evaluation), with minimum absolute increase of 5mm relative to nadir or unequivocal progression of existing non-target lesions, or new lesions.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants were randomized to receive vepdegestrant 200 mg orally, once daily on Days 1 to 28 of each 28-day cycle. Participants continued to receive assigned treatment until objective disease progression, unacceptable toxicity, death, participant refused further treatment, or one of the other reasons for treatment discontinuation per protocol was met.
    id
    OG000
    title
    Vepdegestrant
  2. description
    Participants were randomized to receive fulvestrant 500 mg, intramuscularly (injection) on Days 1 and 15 of Cycle 1 and then on Day 1 of each cycle starting from Cycle 2 Day 1, where 1 cycle = 28 days. Participants continued to receive assigned treatment until objective disease progression, unacceptable toxicity, death, participant refused further treatment, or one of the other reasons for treatment discontinuation per protocol was met.
    id
    OG001
    title
    Fulvestrant
param Type
NUMBER
population Description
FAS included all enrolled participants who were randomized. Here, "Overall Number of Participants Analyzed" signifies number of participants evaluable for this outcome measure.
reporting Status
POSTED
time Frame
From randomization until PD, death due to any cause or start of new anticancer therapy, whichever occurred first (up to 18.56 months and 19.38 months of treatment exposure for vepdegestrant and fulvestrant arms respectively)
title
Clinical Benefit Rate (CBR) by BICR Assessment
type
SECONDARY
unit Of Measure
Percentage of participants

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice