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NCT00567190 · OUTCOME

Progression-Free Survival (PFS) Determined by the Investigator

A Study to Evaluate Pertuzumab + Trastuzumab + Docetaxel vs. Placebo + Trastuzumab + Docetaxel in Previously Untreated HER2-Positive Metastatic Breast Cancer · Source last updated 2019-12-13

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
Tumor assessments every 9 weeks from randomization to investigator-determined PD or death from any cause, whichever occurred first (median [range] time on study in pertuzumab vs. placebo arms: 201.8 [0.7-520.0] weeks vs. 138.0 [0.4-514.7] weeks)

What was measured

PFS was defined as the time from randomization to first documented radiographical progressive disease (PD), as determined by the investigator using RECIST version 1.0, or death from any cause (within 18 weeks of last tumor assessment), whichever occurred first (Kaplan-Meier method). For target lesions, PD was defined as at least a 20% increase in the sum of the longest diameter (LD) of target lesions, taking as reference the smallest sum of the LD recorded since treatment started or the appearance of ≥1 new lesion. For non-target lesions, PD was defined as the appearance of ≥1 new lesion or unequivocal progression of existing lesions. Participants without PD or who had not died within 18 weeks of their last investigator-determined, progression-free tumor assessment were censored at the date of the last investigator tumor assessment; those with no post-baseline tumor assessment and who had not died within 18 weeks of baseline were censored at 1 day.

Analysis population: Intent-to-treat population: All randomized patients.

Groups in this outcome

Pertuzumab + Trastuzumab + Docetaxel

Participants randomized to this arm received pertuzumab 420 milligrams (mg) intravenously (IV) once every 3 weeks (q3w) and trastuzumab 6 milligrams per kilogram (mg/kg) IV q3w, plus docetaxel 75 milligrams per square metre of body surface (mg/m\^2) IV q3w (for at least 6 cycles; 1 cycle was 21 days). After Cycle 6, continuation of docetaxel treatment was at the discretion of the participant and treating physician. Participants remained in the treatment phase of the study until investigator-assessed radiographic or clinical evidence of disease progression, unmanageable toxicity, or study termination and were followed for survival until death, loss to follow-up, withdrawal of consent, or study termination.

Placebo + Trastuzumab + Docetaxel

Participants randomized to this arm received placebo IV q3w and trastuzumab 6 mg/kg IV q3w, plus docetaxel 75 mg/m\^2 IV q3w (for at least 6 cycles; 1 cycle was 21 days). After Cycle 6, continuation of docetaxel treatment was at the discretion of the participant and treating physician. Participants remained in the treatment phase of the study until investigator-assessed radiographic or clinical evidence of disease progression, unmanageable toxicity, or study termination and were followed for survival until death, loss to follow-up, withdrawal of consent, or study termination.

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

Analysis denominator · Participants

GroupSource count
Pertuzumab + Trastuzumab + Docetaxel402
Placebo + Trastuzumab + Docetaxel406

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Pertuzumab + Trastuzumab + Docetaxel18.7Not reported1722Not reported
Placebo + Trastuzumab + Docetaxel12.4Not reported1014Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.59
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.81
    estimate Comment
    Hazard ratio is comparing Pertuzumab arm with Placebo arm.
    group Description
    PFS by Investigator - Stratified
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Cox Proportional Hazard
    param Value
    0.69
    statistical Comment
    Stratified by prior treatment status and region.
    statistical Method
    Log Rank (stratified)
Complete source fields
analyses
  1. ci Lower Limit
    0.59
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.81
    estimate Comment
    Hazard ratio is comparing Pertuzumab arm with Placebo arm.
    group Description
    PFS by Investigator - Stratified
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Cox Proportional Hazard
    param Value
    0.69
    statistical Comment
    Stratified by prior treatment status and region.
    statistical Method
    Log Rank (stratified)
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        17
        upper Limit
        22
        value
        18.7
      2. group Id
        OG001
        lower Limit
        10
        upper Limit
        14
        value
        12.4
denoms
  1. counts
    1. group Id
      OG000
      value
      402
    2. group Id
      OG001
      value
      406
    units
    Participants
description
PFS was defined as the time from randomization to first documented radiographical progressive disease (PD), as determined by the investigator using RECIST version 1.0, or death from any cause (within 18 weeks of last tumor assessment), whichever occurred first (Kaplan-Meier method). For target lesions, PD was defined as at least a 20% increase in the sum of the longest diameter (LD) of target lesions, taking as reference the smallest sum of the LD recorded since treatment started or the appearance of ≥1 new lesion. For non-target lesions, PD was defined as the appearance of ≥1 new lesion or unequivocal progression of existing lesions. Participants without PD or who had not died within 18 weeks of their last investigator-determined, progression-free tumor assessment were censored at the date of the last investigator tumor assessment; those with no post-baseline tumor assessment and who had not died within 18 weeks of baseline were censored at 1 day.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants randomized to this arm received pertuzumab 420 milligrams (mg) intravenously (IV) once every 3 weeks (q3w) and trastuzumab 6 milligrams per kilogram (mg/kg) IV q3w, plus docetaxel 75 milligrams per square metre of body surface (mg/m\^2) IV q3w (for at least 6 cycles; 1 cycle was 21 days). After Cycle 6, continuation of docetaxel treatment was at the discretion of the participant and treating physician. Participants remained in the treatment phase of the study until investigator-assessed radiographic or clinical evidence of disease progression, unmanageable toxicity, or study termination and were followed for survival until death, loss to follow-up, withdrawal of consent, or study termination.
    id
    OG000
    title
    Pertuzumab + Trastuzumab + Docetaxel
  2. description
    Participants randomized to this arm received placebo IV q3w and trastuzumab 6 mg/kg IV q3w, plus docetaxel 75 mg/m\^2 IV q3w (for at least 6 cycles; 1 cycle was 21 days). After Cycle 6, continuation of docetaxel treatment was at the discretion of the participant and treating physician. Participants remained in the treatment phase of the study until investigator-assessed radiographic or clinical evidence of disease progression, unmanageable toxicity, or study termination and were followed for survival until death, loss to follow-up, withdrawal of consent, or study termination.
    id
    OG001
    title
    Placebo + Trastuzumab + Docetaxel
param Type
MEDIAN
population Description
Intent-to-treat population: All randomized patients.
reporting Status
POSTED
time Frame
Tumor assessments every 9 weeks from randomization to investigator-determined PD or death from any cause, whichever occurred first (median [range] time on study in pertuzumab vs. placebo arms: 201.8 [0.7-520.0] weeks vs. 138.0 [0.4-514.7] weeks)
title
Progression-Free Survival (PFS) Determined by the Investigator
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice