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NCT02574455 · OUTCOME

Duration of Response (DOR) 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
MEDIAN
Unit
months
Interval / dispersion
95% Confidence Interval
Time frame
From the first date of documented response of CR or PR 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

DOR was defined as the number of days between the first date showing a documented response of CR or PR and the date of progression or death. 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. 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.

Analysis population: Participants in the BM-ve Population with objective response 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 Govitecan82
Treatment of Physician's Choice (TPC)15

Reported measurements

IRC Assessment

Analysis denominator · Participants

GroupSource count
Sacituzumab Govitecan82
Treatment of Physician's Choice (TPC)11
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Sacituzumab Govitecan6.3Not reported5.57.9Not reported
Treatment of Physician's Choice (TPC)3.6Not reported2.8NADue to smaller number of participants with an event, upper limit of 95% confidence interval (CI) could not be calculated.
Investigator Assessment

Analysis denominator · Participants

GroupSource count
Sacituzumab Govitecan78
Treatment of Physician's Choice (TPC)15
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Sacituzumab Govitecan6.9Not reported5.67.9Not reported
Treatment of Physician's Choice (TPC)3.0Not reported2.84.3Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.150
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.107
    group Description
    DOR by IRC Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0683
    p Value Comment
    Stratified log-rank test and stratified Cox regression adjusted for stratification factors: number of prior chemotherapies, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.407
    statistical Method
    Log Rank
  2. ci Lower Limit
    0.103
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.435
    group Description
    DOR by Investigator Assessment
    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, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.212
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.150
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.107
    group Description
    DOR by IRC Assessment
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0683
    p Value Comment
    Stratified log-rank test and stratified Cox regression adjusted for stratification factors: number of prior chemotherapies, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.407
    statistical Method
    Log Rank
  2. ci Lower Limit
    0.103
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.435
    group Description
    DOR by Investigator Assessment
    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, and region.
    param Type
    Hazard Ratio (HR)
    param Value
    0.212
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        5.5
        upper Limit
        7.9
        value
        6.3
      2. comment
        Due to smaller number of participants with an event, upper limit of 95% confidence interval (CI) could not be calculated.
        group Id
        OG001
        lower Limit
        2.8
        upper Limit
        NA
        value
        3.6
    denoms
    1. counts
      1. group Id
        OG000
        value
        82
      2. group Id
        OG001
        value
        11
      units
      Participants
    title
    IRC Assessment
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        5.6
        upper Limit
        7.9
        value
        6.9
      2. group Id
        OG001
        lower Limit
        2.8
        upper Limit
        4.3
        value
        3.0
    denoms
    1. counts
      1. group Id
        OG000
        value
        78
      2. group Id
        OG001
        value
        15
      units
      Participants
    title
    Investigator Assessment
denoms
  1. counts
    1. group Id
      OG000
      value
      82
    2. group Id
      OG001
      value
      15
    units
    Participants
description
DOR was defined as the number of days between the first date showing a documented response of CR or PR and the date of progression or death. 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. 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.
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
Participants in the BM-ve Population with objective response were analyzed.
reporting Status
POSTED
time Frame
From the first date of documented response of CR or PR 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
Duration of Response (DOR) by IRC and Investigator Assessment in BM-ve Population
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice