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NCT02574455 · OUTCOME

Progression-Free Survival (PFS) by IRC Assessment in the ITT Population

Trial of Sacituzumab Govitecan in Participants With Refractory/Relapsed Metastatic Triple-Negative Breast Cancer (TNBC) · Source last updated 2022-06-15

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
From randomization until objective tumor progression or death (assessed every 6 weeks for 9 months and then every 9 weeks thereafter until the occurrence of progression of disease; maximum exposure: 29.6 months)

What was measured

PFS was defined as the time from randomization until objective tumor progression by RECIST v1.1 or death, whichever came first. The date of progression was date of the last observation or radiological assessment of target lesions that either showed a predefined increase (≥20%) in the sum of the target lesions or the appearance of new non-target lesions. PFS was estimated using Kaplan-Meier estimate.

Analysis population: The ITT Population included all randomized participants.

Groups in this outcome

Sacituzumab Govitecan

Participants received sacituzumab govitecan 10 mg/kg of body weight, administered as a slow IV infusion either by gravity or with an infusion pump on Days 1 and 8 of a 21-day treatment cycle for up to 29.6 months. Infusion rate for the first 15 minutes started with 50 mg/hour or less with a subsequent infusion of 100 to 200 mg/hour up to a maximum recommended rate (advanced every 15 to 30 minutes) of 500 mg/hour with a subsequent infusion of 1000 mg/hour. Participants continued treatment until progression of disease requiring treatment discontinuation or occurrence of unacceptable AEs.

Treatment of Physician's Choice (TPC)

Participants received TPC (ie, eribulin, capecitabine, gemcitabine, or vinorelbine), administered as a single-agent regimen that was selected by the investigator before participant randomization. Participants continued treatment until progression of disease requiring treatment discontinuation or occurrence of unacceptable AEs. Eribulin was administered IV over 2 to 5 minutes at a dose 1.4 mg/m\^2 at North American sites and 1.23 mg/m\^2 at European sites on Days 1 and 8 of a 21-day cycle for up to 15.3 months. Lower doses were administered on the same schedule to participants with moderate hepatic impairment (ie, Child-Pugh B; 0.7 mg/m\^2 and 0.67 mg/m\^2 for North American and European sites, respectively). Capecitabine 1000 to 1250 mg/m\^2 was administered in a 21-day cycle, with capecitabine administered orally twice daily for 2 weeks followed by 1-week rest period for up to 10.6 months. Gemcitabine 800 to 1200 mg/m\^2 was administered IV over 30 minutes on Days 1, 8, and 15 of a 28-day cycle for up to 8.1 months. Vinorelbine 25 mg/m\^2 was administered as a weekly IV injection over 6-10 minutes for up to 11.5 months. Vinorelbine was not allowed as TPC for any participant with Grade 2 neuropathy.

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

Analysis denominator · Participants

GroupSource count
Sacituzumab Govitecan267
Treatment of Physician's Choice (TPC)262

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Sacituzumab Govitecan4.8Not reported4.15.8Not reported
Treatment of Physician's Choice (TPC)1.7Not reported1.52.5Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.330
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.517
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    p Value Comment
    Stratified log-rank test and stratified Cox regression adjusted for stratification factors: number of prior chemotherapies, presence of known brain metastases at study entry, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.413
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.330
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.517
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    p Value Comment
    Stratified log-rank test and stratified Cox regression adjusted for stratification factors: number of prior chemotherapies, presence of known brain metastases at study entry, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.413
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        4.1
        upper Limit
        5.8
        value
        4.8
      2. group Id
        OG001
        lower Limit
        1.5
        upper Limit
        2.5
        value
        1.7
denoms
  1. counts
    1. group Id
      OG000
      value
      267
    2. group Id
      OG001
      value
      262
    units
    Participants
description
PFS was defined as the time from randomization until objective tumor progression by RECIST v1.1 or death, whichever came first. The date of progression was date of the last observation or radiological assessment of target lesions that either showed a predefined increase (≥20%) in the sum of the target lesions or the appearance of new non-target lesions. PFS was estimated using Kaplan-Meier estimate.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received sacituzumab govitecan 10 mg/kg of body weight, administered as a slow IV infusion either by gravity or with an infusion pump on Days 1 and 8 of a 21-day treatment cycle for up to 29.6 months. Infusion rate for the first 15 minutes started with 50 mg/hour or less with a subsequent infusion of 100 to 200 mg/hour up to a maximum recommended rate (advanced every 15 to 30 minutes) of 500 mg/hour with a subsequent infusion of 1000 mg/hour. Participants continued treatment until progression of disease requiring treatment discontinuation or occurrence of unacceptable AEs.
    id
    OG000
    title
    Sacituzumab Govitecan
  2. description
    Participants received TPC (ie, eribulin, capecitabine, gemcitabine, or vinorelbine), administered as a single-agent regimen that was selected by the investigator before participant randomization. Participants continued treatment until progression of disease requiring treatment discontinuation or occurrence of unacceptable AEs. Eribulin was administered IV over 2 to 5 minutes at a dose 1.4 mg/m\^2 at North American sites and 1.23 mg/m\^2 at European sites on Days 1 and 8 of a 21-day cycle for up to 15.3 months. Lower doses were administered on the same schedule to participants with moderate hepatic impairment (ie, Child-Pugh B; 0.7 mg/m\^2 and 0.67 mg/m\^2 for North American and European sites, respectively). Capecitabine 1000 to 1250 mg/m\^2 was administered in a 21-day cycle, with capecitabine administered orally twice daily for 2 weeks followed by 1-week rest period for up to 10.6 months. Gemcitabine 800 to 1200 mg/m\^2 was administered IV over 30 minutes on Days 1, 8, and 15 of a 28-day cycle for up to 8.1 months. Vinorelbine 25 mg/m\^2 was administered as a weekly IV injection over 6-10 minutes for up to 11.5 months. Vinorelbine was not allowed as TPC for any participant with Grade 2 neuropathy.
    id
    OG001
    title
    Treatment of Physician's Choice (TPC)
param Type
MEDIAN
population Description
The ITT Population included all randomized participants.
reporting Status
POSTED
time Frame
From randomization until objective tumor progression or death (assessed every 6 weeks for 9 months and then every 9 weeks thereafter until the occurrence of progression of disease; maximum exposure: 29.6 months)
title
Progression-Free Survival (PFS) by IRC Assessment in the ITT Population
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice