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NCT02574455 · OUTCOME

Clinical Benefit Rate (CBR) by IRC and Investigator Assessment in BM-ve 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
NUMBER
Unit
percentage of participants
Interval / dispersion
95% Confidence Interval
Time frame
From randomization to the date of 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

CBR was defined as the percentage of participants with best response as either CR, PR, or stable disease (SD) with a duration of ≥6 months. CR: Disappearance of all target and non-target lesions; and normalization of tumor marker levels initially above upper limits of normal; and no new lesions. PR: ≥30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD; and no new lesions. SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum LD since the treatment started; and Persistence of one or more non-target lesion(s) or/and maintenance of tumor marker level above the normal limits. PD: ≥20% increase in the sum of LD of target lesions, taking as reference the smallest sum LD recorded since treatment started or appearance of one or more new lesions and/or unequivocal progression of existing non-target lesions.

Analysis population: Participants in the BM-ve Population were analyzed.

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 Govitecan235
Treatment of Physician's Choice (TPC)233

Reported measurements

IRC Assessment
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Sacituzumab Govitecan44.7Not reported38.251.3Not reported
Treatment of Physician's Choice (TPC)8.6Not reported5.312.9Not reported
Investigator Assessment
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Sacituzumab Govitecan45.5Not reported39.052.1Not reported
Treatment of Physician's Choice (TPC)10.3Not reported6.714.9Not reported

Source statistical analyses

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

  1. ci Lower Limit
    5.055
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    14.437
    group Description
    CBR by IRC Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    8.543
    statistical Method
    Cochran-Mantel-Haenszel
  2. ci Lower Limit
    4.540
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    12.364
    group Description
    CBR by Investigator Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    7.492
    statistical Method
    Cochran-Mantel-Haenszel
Complete source fields
analyses
  1. ci Lower Limit
    5.055
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    14.437
    group Description
    CBR by IRC Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    8.543
    statistical Method
    Cochran-Mantel-Haenszel
  2. ci Lower Limit
    4.540
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    12.364
    group Description
    CBR by Investigator Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    7.492
    statistical Method
    Cochran-Mantel-Haenszel
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        38.2
        upper Limit
        51.3
        value
        44.7
      2. group Id
        OG001
        lower Limit
        5.3
        upper Limit
        12.9
        value
        8.6
    title
    IRC Assessment
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        39.0
        upper Limit
        52.1
        value
        45.5
      2. group Id
        OG001
        lower Limit
        6.7
        upper Limit
        14.9
        value
        10.3
    title
    Investigator Assessment
denoms
  1. counts
    1. group Id
      OG000
      value
      235
    2. group Id
      OG001
      value
      233
    units
    Participants
description
CBR was defined as the percentage of participants with best response as either CR, PR, or stable disease (SD) with a duration of ≥6 months. CR: Disappearance of all target and non-target lesions; and normalization of tumor marker levels initially above upper limits of normal; and no new lesions. PR: ≥30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD; and no new lesions. SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum LD since the treatment started; and Persistence of one or more non-target lesion(s) or/and maintenance of tumor marker level above the normal limits. PD: ≥20% increase in the sum of LD of target lesions, taking as reference the smallest sum LD recorded since treatment started or appearance of one or more new lesions and/or unequivocal progression of existing non-target lesions.
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
NUMBER
population Description
Participants in the BM-ve Population were analyzed.
reporting Status
POSTED
time Frame
From randomization to the date of 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
Clinical Benefit Rate (CBR) by IRC and Investigator Assessment in BM-ve Population
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice