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NCT01412957 · OUTCOME

Objective Response Rate

Comparison of Survival Benefit of Panitumumab With Supportive Care to Best Supportive Care Alone in Patients With Metastatic Colorectal Cancer · Source last updated 2017-03-15

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
Response was assessed at Week 4, Week 8, and then every 8 weeks until the data cut-off date of 10 June 2014. The median follow-up time was 34.9 weeks (panitumumab plus BSC: 41.0 weeks; BSC alone: 25.5 weeks).

What was measured

Objective response rate (ORR) is defined as the percentage of participants with either a complete response (CR) or partial response (PR) per RECIST version 1.1. Radiographic tumor assessments and investigator's assessment of response were performed at Week 4, Week 8, and then every 8 weeks until disease progression (radiographic or clinical progression). CR: Disappearance of all target and non-target lesions and no new lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \< 10 mm. PR: At least a 30% decrease in the size of target lesions with no progression of non-target lesions and no new lesions, or, the disappearance of all target lesions with persistence of one or more non-target lesions not qualifying for either CR or PD and no new lesions.

Analysis population: ITT analysis set

Groups in this outcome

Panitumumab + BSC

Participants received panitumumab administered intravenously 6 mg/kg every 14 days plus best supportive care (BSC) until disease progression, withdrawal of consent, death, or intolerance of study drug.

BSC Alone

Participants received best supportive care until disease progression, withdrawal of consent, or death.

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

Analysis denominator · Participants

GroupSource count
Panitumumab + BSC189
BSC Alone188

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Panitumumab + BSC26.98Not reported20.8033.91Not reported
BSC Alone1.60Not reported0.334.59Not reported

Source statistical analyses

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

  1. ci Lower Limit
    7.47
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    123.77
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus BSC arm relative to the odds in BSC alone arm.
    group Description
    ORR was not formally tested and the p-values are descriptive only. An exact test was used to test the hypothesis that the common odds ratio for panitumumab plus BSC relative to BSC alone for the objective response is equal to 1.0 stratified by the randomization factors.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    24.89
    statistical Comment
    Stratified by randomization factors: geographic region (Europe vs Asia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    statistical Method
    Stratified exact test
Complete source fields
analyses
  1. ci Lower Limit
    7.47
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    123.77
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus BSC arm relative to the odds in BSC alone arm.
    group Description
    ORR was not formally tested and the p-values are descriptive only. An exact test was used to test the hypothesis that the common odds ratio for panitumumab plus BSC relative to BSC alone for the objective response is equal to 1.0 stratified by the randomization factors.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    24.89
    statistical Comment
    Stratified by randomization factors: geographic region (Europe vs Asia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    statistical Method
    Stratified exact test
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        20.80
        upper Limit
        33.91
        value
        26.98
      2. group Id
        OG001
        lower Limit
        0.33
        upper Limit
        4.59
        value
        1.60
denoms
  1. counts
    1. group Id
      OG000
      value
      189
    2. group Id
      OG001
      value
      188
    units
    Participants
description
Objective response rate (ORR) is defined as the percentage of participants with either a complete response (CR) or partial response (PR) per RECIST version 1.1. Radiographic tumor assessments and investigator's assessment of response were performed at Week 4, Week 8, and then every 8 weeks until disease progression (radiographic or clinical progression). CR: Disappearance of all target and non-target lesions and no new lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \< 10 mm. PR: At least a 30% decrease in the size of target lesions with no progression of non-target lesions and no new lesions, or, the disappearance of all target lesions with persistence of one or more non-target lesions not qualifying for either CR or PD and no new lesions.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received panitumumab administered intravenously 6 mg/kg every 14 days plus best supportive care (BSC) until disease progression, withdrawal of consent, death, or intolerance of study drug.
    id
    OG000
    title
    Panitumumab + BSC
  2. description
    Participants received best supportive care until disease progression, withdrawal of consent, or death.
    id
    OG001
    title
    BSC Alone
param Type
NUMBER
population Description
ITT analysis set
reporting Status
POSTED
time Frame
Response was assessed at Week 4, Week 8, and then every 8 weeks until the data cut-off date of 10 June 2014. The median follow-up time was 34.9 weeks (panitumumab plus BSC: 41.0 weeks; BSC alone: 25.5 weeks).
title
Objective Response Rate
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice