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NCT00829166 · OUTCOME

Duration of Objective Response (DOR) as Assessed by an IRC

A Study of Trastuzumab Emtansine Versus Capecitabine + Lapatinib in Participants With HER2-positive Locally Advanced or Metastatic Breast Cancer · Source last updated 2016-10-31

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 date of randomization through the data cut-off date of 14 Jan 2012 (up to 2 years, 11 months)

What was measured

Tumor response was assessed by an IRC according to modified RECIST. DOR was defined as the time from first documented OR to first documented PD or death from any cause, whichever occurred earlier. OR was defined as a CR or PR determined on 2 consecutive tumor assessments at least 4 weeks apart. For TLs, CR was defined as the disappearance of all TLs; PR was defined as \>/=30% decrease in the SLD of TLs, taking as reference the baseline SLD; and PD was defined as \>/=20% increase in the SLD, taking as reference the smallest SLD recorded since treatment started or the appearance of 1 or more new lesions. For non-TLs, CR was defined as the disappearance of all non-TLs; PR was defined as the persistence of 1 or more non-TLs; and PD was defined as appearance of 1 or more new lesions and/or unequivocal progression of existing non-TLs. The 95% CI was computed using the method of Brookmeyer and Crowley.

Analysis population: ITT population included all randomized participants on the basis of the treatment assigned at randomization. Only participants with an objective response were included in the analysis.

Groups in this outcome

Trastuzumab Emtansine

Participants received trastuzumab emtansine 3.6 mg/kg IV infusion over 30-90 minutes on Day 1 of each 21-day treatment cycle until PD (as assessed by the investigator), unmanageable toxicity, or study termination.

Lapatinib + Capecitabine

Participants received lapatinib 1250 mg (five 250 mg tablets) orally once daily during each 21-day cycle + capecitabine 1000 mg/m\^2 orally twice daily on Days 1-14 of each 21-day treatment cycle until PD (as assessed by the investigator), unmanageable toxicity, or study termination. Participants of this group were allowed to cross over to receive trastuzumab emtansine based on statistically significant OS benefit in favor of trastuzumab emtansine demonstrated in second interim analysis.

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

Analysis denominator · Participants

GroupSource count
Trastuzumab Emtansine173
Lapatinib + Capecitabine120

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Trastuzumab Emtansine12.6Not reported8.3820.76Not reported
Lapatinib + Capecitabine6.5Not reported5.457.16Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        8.38
        upper Limit
        20.76
        value
        12.6
      2. group Id
        OG001
        lower Limit
        5.45
        upper Limit
        7.16
        value
        6.5
denoms
  1. counts
    1. group Id
      OG000
      value
      173
    2. group Id
      OG001
      value
      120
    units
    Participants
description
Tumor response was assessed by an IRC according to modified RECIST. DOR was defined as the time from first documented OR to first documented PD or death from any cause, whichever occurred earlier. OR was defined as a CR or PR determined on 2 consecutive tumor assessments at least 4 weeks apart. For TLs, CR was defined as the disappearance of all TLs; PR was defined as \>/=30% decrease in the SLD of TLs, taking as reference the baseline SLD; and PD was defined as \>/=20% increase in the SLD, taking as reference the smallest SLD recorded since treatment started or the appearance of 1 or more new lesions. For non-TLs, CR was defined as the disappearance of all non-TLs; PR was defined as the persistence of 1 or more non-TLs; and PD was defined as appearance of 1 or more new lesions and/or unequivocal progression of existing non-TLs. The 95% CI was computed using the method of Brookmeyer and Crowley.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received trastuzumab emtansine 3.6 mg/kg IV infusion over 30-90 minutes on Day 1 of each 21-day treatment cycle until PD (as assessed by the investigator), unmanageable toxicity, or study termination.
    id
    OG000
    title
    Trastuzumab Emtansine
  2. description
    Participants received lapatinib 1250 mg (five 250 mg tablets) orally once daily during each 21-day cycle + capecitabine 1000 mg/m\^2 orally twice daily on Days 1-14 of each 21-day treatment cycle until PD (as assessed by the investigator), unmanageable toxicity, or study termination. Participants of this group were allowed to cross over to receive trastuzumab emtansine based on statistically significant OS benefit in favor of trastuzumab emtansine demonstrated in second interim analysis.
    id
    OG001
    title
    Lapatinib + Capecitabine
param Type
MEDIAN
population Description
ITT population included all randomized participants on the basis of the treatment assigned at randomization. Only participants with an objective response were included in the analysis.
reporting Status
POSTED
time Frame
From the date of randomization through the data cut-off date of 14 Jan 2012 (up to 2 years, 11 months)
title
Duration of Objective Response (DOR) as Assessed by an IRC
type
SECONDARY
unit Of Measure
Months

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice