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NCT05169567 · OUTCOME

Progression-Free Survival (PFS)

Abemaciclib (LY2835219) Plus Fulvestrant Compared to Placebo Plus Fulvestrant in Previously Treated Breast Cancer · Source last updated 2026-01-16

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 to the date of first documented progression of disease or death from any cause (Up to 21 Months)

What was measured

PFS defined as the time from the date of randomization to the first evidence of disease progression as defined by response evaluation criteria in solid tumors (RECIST) v1.1 or death from any cause. Progressive Disease (PD) was at least a 20% increase in the sum of the diameters of target lesions, with reference being the smallest sum on study and an absolute increase of at least 5 mm, or unequivocal progression of non-target lesions, or 1 or more new lesions. If a participant does not have a complete baseline disease assessment, then the PFS time was censored at the date of randomization, regardless of whether or not objectively determined disease progression or death has been observed for the participant. If a participant was not known to have died or have objective progression as of the data inclusion cutoff date for the analysis, the PFS time was censored at the last adequate tumor assessment date.

Analysis population: All randomized participants (including censored). Censored participants: Abemaciclib plus fulvestrant (n = 65), Placebo plus fulvestrant (n = 45).

Groups in this outcome

Arm A: Abemaciclib Plus Fulvestrant

Abemaciclib 150 mg administered orally BID on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500 mg administered IM on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation criteria were met.

Arm B: Placebo Plus Fulvestrant

Placebo administered orally BID on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500 mg administered IM on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation criteria 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 A: Abemaciclib Plus Fulvestrant182
Arm B: Placebo Plus Fulvestrant186

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Arm A: Abemaciclib Plus Fulvestrant6Not reported5.68.1Not reported
Arm B: Placebo Plus Fulvestrant5.3Not reported3.75.6Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.57
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.95
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.02
    param Type
    Hazard Ratio (HR)
    param Value
    0.73
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.57
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.95
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.02
    param Type
    Hazard Ratio (HR)
    param Value
    0.73
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        5.6
        upper Limit
        8.1
        value
        6
      2. group Id
        OG001
        lower Limit
        3.7
        upper Limit
        5.6
        value
        5.3
denoms
  1. counts
    1. group Id
      OG000
      value
      182
    2. group Id
      OG001
      value
      186
    units
    Participants
description
PFS defined as the time from the date of randomization to the first evidence of disease progression as defined by response evaluation criteria in solid tumors (RECIST) v1.1 or death from any cause. Progressive Disease (PD) was at least a 20% increase in the sum of the diameters of target lesions, with reference being the smallest sum on study and an absolute increase of at least 5 mm, or unequivocal progression of non-target lesions, or 1 or more new lesions. If a participant does not have a complete baseline disease assessment, then the PFS time was censored at the date of randomization, regardless of whether or not objectively determined disease progression or death has been observed for the participant. If a participant was not known to have died or have objective progression as of the data inclusion cutoff date for the analysis, the PFS time was censored at the last adequate tumor assessment date.
dispersion Type
95% Confidence Interval
groups
  1. description
    Abemaciclib 150 mg administered orally BID on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500 mg administered IM on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation criteria were met.
    id
    OG000
    title
    Arm A: Abemaciclib Plus Fulvestrant
  2. description
    Placebo administered orally BID on Days 1 to 28 of a 28-day cycle in combination with fulvestrant 500 mg administered IM on Days 1 and 15 of Cycle 1, then on Day 1 of Cycle 2 and beyond. Participants received treatment until discontinuation criteria were met.
    id
    OG001
    title
    Arm B: Placebo Plus Fulvestrant
param Type
MEDIAN
population Description
All randomized participants (including censored). Censored participants: Abemaciclib plus fulvestrant (n = 65), Placebo plus fulvestrant (n = 45).
reporting Status
POSTED
time Frame
Randomization to the date of first documented progression of disease or death from any cause (Up to 21 Months)
title
Progression-Free Survival (PFS)
type
PRIMARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice