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NCT02437318 · OUTCOME

Progression-free Survival (PFS) Per Investigator Assessment in the PIK3CA Mutant Cohort

Study Assessing the Efficacy and Safety of Alpelisib Plus Fulvestrant in Men and Postmenopausal Women With Advanced Breast Cancer Which Progressed on or After Aromatase Inhibitor Treatment. · Source last updated 2025-02-13

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
Once approximately 243 PFS events in the PIK3CA mutant cohort had been observed, up to 33.3 months

What was measured

PFS was defined as the time from the date of randomization to the date of the first documented progression or death due to any cause. PFS was assessed via a local radiology assessment according to RECIST 1.1. If a patient did not have an event, PFS was censored at the date of last adequate tumor assessment. The PFS distribution was estimated using Kaplan-Meier methodology. Progression was defined as at least a 20% increase in the sum of diameter of all measured target lesions, taking as reference the smallest sum of diameter of all target lesions recorded at or after baseline. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.

Analysis population: All subjects with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) who were randomized to study treatment

Groups in this outcome

PIK3CA Mutant Cohort by Tumor Tissue: Alpelisib + Fulvestrant

Subjects with advanced breast cancer with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) treated with alpelisib (300 mg; oral; once daily) in combination with fulvestrant (500 mg; intramuscular injection on Day 1 and Day 15 of Cycle 1, and then Day 1 of each subsequent 28-day cycle)

PIK3CA Mutant Cohort by Tumor Tissue: Placebo + Fulvestrant

Subjects with advanced breast cancer with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) treated with placebo (300 mg; oral; once daily) in combination with fulvestrant (500 mg; intramuscular injection on Day 1 and Day 15 of Cycle 1, and then Day 1 of each subsequent 28-day cycle)

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

Analysis denominator · Participants

GroupSource count
PIK3CA Mutant Cohort by Tumor Tissue: Alpelisib + Fulvestrant169
PIK3CA Mutant Cohort by Tumor Tissue: Placebo + Fulvestrant172

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
PIK3CA Mutant Cohort by Tumor Tissue: Alpelisib + Fulvestrant11.0Not reported7.4914.52Not reported
PIK3CA Mutant Cohort by Tumor Tissue: Placebo + Fulvestrant5.7Not reported3.657.36Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.50
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.85
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.00065
    p Value Comment
    (one-sided)
    param Type
    Hazard Ratio (HR)
    param Value
    0.65
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.50
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.85
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.00065
    p Value Comment
    (one-sided)
    param Type
    Hazard Ratio (HR)
    param Value
    0.65
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        7.49
        upper Limit
        14.52
        value
        11.0
      2. group Id
        OG001
        lower Limit
        3.65
        upper Limit
        7.36
        value
        5.7
denoms
  1. counts
    1. group Id
      OG000
      value
      169
    2. group Id
      OG001
      value
      172
    units
    Participants
description
PFS was defined as the time from the date of randomization to the date of the first documented progression or death due to any cause. PFS was assessed via a local radiology assessment according to RECIST 1.1. If a patient did not have an event, PFS was censored at the date of last adequate tumor assessment. The PFS distribution was estimated using Kaplan-Meier methodology. Progression was defined as at least a 20% increase in the sum of diameter of all measured target lesions, taking as reference the smallest sum of diameter of all target lesions recorded at or after baseline. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.
dispersion Type
95% Confidence Interval
groups
  1. description
    Subjects with advanced breast cancer with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) treated with alpelisib (300 mg; oral; once daily) in combination with fulvestrant (500 mg; intramuscular injection on Day 1 and Day 15 of Cycle 1, and then Day 1 of each subsequent 28-day cycle)
    id
    OG000
    title
    PIK3CA Mutant Cohort by Tumor Tissue: Alpelisib + Fulvestrant
  2. description
    Subjects with advanced breast cancer with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) treated with placebo (300 mg; oral; once daily) in combination with fulvestrant (500 mg; intramuscular injection on Day 1 and Day 15 of Cycle 1, and then Day 1 of each subsequent 28-day cycle)
    id
    OG001
    title
    PIK3CA Mutant Cohort by Tumor Tissue: Placebo + Fulvestrant
param Type
MEDIAN
population Description
All subjects with a PIK3CA mutation (based on central testing of hotspot-mutations in tumor tissue) who were randomized to study treatment
reporting Status
POSTED
time Frame
Once approximately 243 PFS events in the PIK3CA mutant cohort had been observed, up to 33.3 months
title
Progression-free Survival (PFS) Per Investigator Assessment in the PIK3CA Mutant Cohort
type
PRIMARY
unit Of Measure
Months

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