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NCT04975308 · OUTCOME

Time to Sustained Worsening of the "Worst Pain" as Measured by Worst Pain NRS (Between Arm C and Arm A)

A Study of Imlunestrant, Investigator's Choice of Endocrine Therapy, and Imlunestrant Plus Abemaciclib in Participants With ER+, HER2- Advanced Breast Cancer · Source last updated 2026-07-22

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
Randomization through follow-up (up to 20 months)

What was measured

Time to sustained worsening of worst pain is defined as the time from randomization to the first increase (≥2 points) in the weekly average of the worst pain score, with confirmation in the next consecutive week. It was measured by the Worst Pain Numeric Rating Scale (NRS). NRS is a single-item, participant-administered, 11-point horizontal scale ranging from 0 to 10, with 0 representing "no pain" and 10 representing "pain as bad as you can imagine." Participants not known to have sustained worsening will be censored at the last documented assessment.

Analysis population: All participants who were randomly assigned to either arm A or arm C concurrently and had at least one NRS assessment available (including censored). Number of participants censored in "Arm C=163," "Arm A=162."

Groups in this outcome

Arm C: Imlunestrant + Abemaciclib

Participants received Imlunestrant 400 mg orally once daily on Days 1 to 28 of a 28-day cycle, plus Abemaciclib 150 mg orally twice daily on Days 1 to 28 of a 28-day cycle, until disease progression or a criterion for discontinuation was met.

Arm A: Imlunestrant

Participants received Imlunestrant 400 milligrams (mg) orally once daily on days 1 to 28 of a 28-day cycle, until disease progression or a criterion for discontinuation were 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
Arm C: Imlunestrant + Abemaciclib204
Arm A: Imlunestrant198

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Arm C: Imlunestrant + AbemaciclibNANot reportedNANADue to the high number of censored participants, there were not enough events to estimate the median and 95% confidence interval.
Arm A: ImlunestrantNANot reportedNANADue to the high number of censored participants, there were not enough events to estimate the median and 95% confidence interval.
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        Due to the high number of censored participants, there were not enough events to estimate the median and 95% confidence interval.
        group Id
        OG000
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
      2. comment
        Due to the high number of censored participants, there were not enough events to estimate the median and 95% confidence interval.
        group Id
        OG001
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
denoms
  1. counts
    1. group Id
      OG000
      value
      204
    2. group Id
      OG001
      value
      198
    units
    Participants
description
Time to sustained worsening of worst pain is defined as the time from randomization to the first increase (≥2 points) in the weekly average of the worst pain score, with confirmation in the next consecutive week. It was measured by the Worst Pain Numeric Rating Scale (NRS). NRS is a single-item, participant-administered, 11-point horizontal scale ranging from 0 to 10, with 0 representing "no pain" and 10 representing "pain as bad as you can imagine." Participants not known to have sustained worsening will be censored at the last documented assessment.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received Imlunestrant 400 mg orally once daily on Days 1 to 28 of a 28-day cycle, plus Abemaciclib 150 mg orally twice daily on Days 1 to 28 of a 28-day cycle, until disease progression or a criterion for discontinuation was met.
    id
    OG000
    title
    Arm C: Imlunestrant + Abemaciclib
  2. description
    Participants received Imlunestrant 400 milligrams (mg) orally once daily on days 1 to 28 of a 28-day cycle, until disease progression or a criterion for discontinuation were met.
    id
    OG001
    title
    Arm A: Imlunestrant
param Type
MEDIAN
population Description
All participants who were randomly assigned to either arm A or arm C concurrently and had at least one NRS assessment available (including censored). Number of participants censored in "Arm C=163," "Arm A=162."
reporting Status
POSTED
time Frame
Randomization through follow-up (up to 20 months)
title
Time to Sustained Worsening of the "Worst Pain" as Measured by Worst Pain NRS (Between Arm C and Arm A)
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice