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NCT01358877 · OUTCOME

Percentage of Participants With Secondary Cardiac Event, Final Analysis

A Study of Pertuzumab in Addition to Chemotherapy and Trastuzumab as Adjuvant Therapy in Participants With Human Epidermal Growth Receptor 2 (HER2)-Positive Primary Breast Cancer · Source last updated 2025-11-28

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
Not reported
Time frame
Baseline until the end of follow-up (median [range] follow-up: 11.3 [0.1-12.9] years)

What was measured

Secondary cardiac event was defined as asymptomatic or mildly symptomatic (NYHA Class II) significant drop in LVEF (defined as an absolute decrease of at least 10 EF points from baseline and to below 50%), confirmed by a second LVEF assessment within approximately three weeks of the first significant LVEF assessment or confirmed by the Cardiac Advisory Board (CAB).

Analysis population: Safety population

Groups in this outcome

Pertuzumab + Trastuzumab + Chemotherapy

Participants received pertuzumab (840 mg loading dose, then 420 mg) and trastuzumab (8 mg/kg loading dose, then 6 mg/kg) IV Q3W for 1 year (maximum 18 cycles) in combination with 1 of the following IV chemotherapy regimen (anthracycline-based or nonanthracycline-based) per Investigator's choice: 1) 3-4 cycles (Q3W) of 5-fluorouracil 500-600 mg/m\^2 + epirubicin 90-120 mg/m\^2 or doxorubicin 50 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W (100 mg/m\^2 for 3 cycles, 75 mg/m\^2 in first cycle and 100 mg/m\^2 in subsequent cycles, or 75 mg/m\^2 for 4 cycles) or 12 cycles of paclitaxel 80 mg/m\^2 QW; 2) 4 cycles (Q3W) of doxorubicin 60 mg/m\^2 or epirubicin 90-120 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W or 12 cycles of paclitaxel QW (as described in Option 1); 3) 6 cycles (Q3W) of docetaxel 75 mg/m\^2 + carboplatin area under the curve (AUC) 6 (up to 900 mg).

Placebo + Trastuzumab + Chemotherapy

Participants received placebo matched to pertuzumab IV Q3W and trastuzumab (8 mg/kg loading dose, then 6 mg/kg) IV Q3W for 1 year (maximum 18 cycles) in combination with 1 of the following IV chemotherapy regimen (anthracycline-based or nonanthracycline-based) per Investigator's choice: 1) 3-4 cycles (Q3W) of 5-fluorouracil 500-600 mg/m\^2 + epirubicin 90-120 mg/m\^2 or doxorubicin 50 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W (100 mg/m\^2 for 3 cycles, 75 mg/m\^2 in first cycle and 100 mg/m\^2 in subsequent cycles, or 75 mg/m\^2 for 4 cycles) or 12 cycles of paclitaxel 80 mg/m\^2 QW; 2) 4 cycles (Q3W) of doxorubicin 60 mg/m\^2 or epirubicin 90-120 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W or 12 cycles of paclitaxel QW (as described in Option 1); 3) 6 cycles (Q3W) of docetaxel 75 mg/m\^2 + carboplatin AUC 6 (up to 900 mg).

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 + Chemotherapy2364
Placebo + Trastuzumab + Chemotherapy2405

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Pertuzumab + Trastuzumab + Chemotherapy2.9Not reportedNot reportedNot reportedNot reported
Placebo + Trastuzumab + Chemotherapy3.0Not reportedNot reportedNot reportedNot reported

Source statistical analyses

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

  1. ci Lower Limit
    -1.1
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.9
    estimate Comment
    95% CI was estimated using Hauck-Anderson correction.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    param Type
    Treatment Difference
    param Value
    -0.1
Complete source fields
analyses
  1. ci Lower Limit
    -1.1
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.9
    estimate Comment
    95% CI was estimated using Hauck-Anderson correction.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    param Type
    Treatment Difference
    param Value
    -0.1
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        2.9
      2. group Id
        OG001
        value
        3.0
denoms
  1. counts
    1. group Id
      OG000
      value
      2364
    2. group Id
      OG001
      value
      2405
    units
    Participants
description
Secondary cardiac event was defined as asymptomatic or mildly symptomatic (NYHA Class II) significant drop in LVEF (defined as an absolute decrease of at least 10 EF points from baseline and to below 50%), confirmed by a second LVEF assessment within approximately three weeks of the first significant LVEF assessment or confirmed by the Cardiac Advisory Board (CAB).
groups
  1. description
    Participants received pertuzumab (840 mg loading dose, then 420 mg) and trastuzumab (8 mg/kg loading dose, then 6 mg/kg) IV Q3W for 1 year (maximum 18 cycles) in combination with 1 of the following IV chemotherapy regimen (anthracycline-based or nonanthracycline-based) per Investigator's choice: 1) 3-4 cycles (Q3W) of 5-fluorouracil 500-600 mg/m\^2 + epirubicin 90-120 mg/m\^2 or doxorubicin 50 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W (100 mg/m\^2 for 3 cycles, 75 mg/m\^2 in first cycle and 100 mg/m\^2 in subsequent cycles, or 75 mg/m\^2 for 4 cycles) or 12 cycles of paclitaxel 80 mg/m\^2 QW; 2) 4 cycles (Q3W) of doxorubicin 60 mg/m\^2 or epirubicin 90-120 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W or 12 cycles of paclitaxel QW (as described in Option 1); 3) 6 cycles (Q3W) of docetaxel 75 mg/m\^2 + carboplatin area under the curve (AUC) 6 (up to 900 mg).
    id
    OG000
    title
    Pertuzumab + Trastuzumab + Chemotherapy
  2. description
    Participants received placebo matched to pertuzumab IV Q3W and trastuzumab (8 mg/kg loading dose, then 6 mg/kg) IV Q3W for 1 year (maximum 18 cycles) in combination with 1 of the following IV chemotherapy regimen (anthracycline-based or nonanthracycline-based) per Investigator's choice: 1) 3-4 cycles (Q3W) of 5-fluorouracil 500-600 mg/m\^2 + epirubicin 90-120 mg/m\^2 or doxorubicin 50 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W (100 mg/m\^2 for 3 cycles, 75 mg/m\^2 in first cycle and 100 mg/m\^2 in subsequent cycles, or 75 mg/m\^2 for 4 cycles) or 12 cycles of paclitaxel 80 mg/m\^2 QW; 2) 4 cycles (Q3W) of doxorubicin 60 mg/m\^2 or epirubicin 90-120 mg/m\^2 + cyclophosphamide 500-600 mg/m\^2 followed by either 3-4 cycles of docetaxel Q3W or 12 cycles of paclitaxel QW (as described in Option 1); 3) 6 cycles (Q3W) of docetaxel 75 mg/m\^2 + carboplatin AUC 6 (up to 900 mg).
    id
    OG001
    title
    Placebo + Trastuzumab + Chemotherapy
param Type
NUMBER
population Description
Safety population
reporting Status
POSTED
time Frame
Baseline until the end of follow-up (median [range] follow-up: 11.3 [0.1-12.9] years)
title
Percentage of Participants With Secondary Cardiac Event, Final Analysis
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice