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NCT00339183 · OUTCOME

Percentage of Participants With an Objective Response

Comparison of Treatment Effect of Chemotherapy With Panitumumab to Chemotherapy Alone · Source last updated 2022-09-23

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
Every 8 weeks until disease progression up to the data cut-off date of 30 April 2009. Maximum time on follow-up was 33 months.

What was measured

Participants were evaluated for tumor response per the modified Response Evaluation Criteria in Solid Tumors (RECIST) criteria every 8 weeks until disease progression. Objective response was defined as the incidence of either a confirmed complete or partial response (CR or PR) while on study, as determined by blinded independent central review and confirmed no less than 4-weeks after the criteria for response are first met. CR: Disappearance of all target and non-target lesions and no new lesions. PR: At least a 30% decrease in the sum of the longest diameter of target lesions and no progression of non-target or no new lesions, or, disappearance of all target lesions and the persistence of ≥ 1 non-target lesion not qualifying for either CR or progressive disease. Participants without a post-baseline assessment were considered non-responders.

Analysis population: KRAS Central Tumor Response Analysis Set: subset of participants with at least one uni-dimensionally measurable lesion per the modified RECIST criteria per blinded central radiology review for whom KRAS was assessed.

Groups in this outcome

Wild-type KRAS - Panitumumab Plus FOLFIRI

Participants with wild-type KRAS were randomized to 6 mg/kg panitumumab plus FOLFIRI chemotherapy regimen administered in cycles every two weeks.

Wild-type KRAS - FOLFIRI Alone

Participants with wild-type KRAS were randomized to FOLFIRI chemotherapy regimen administered in cycles every two weeks.

Mutant KRAS - Panitumumab Plus FOLFIRI

Participants with mutant KRAS were randomized to 6 mg/kg panitumumab plus FOLFIRI chemotherapy regimen administered in cycles every two weeks.

Mutant KRAS - FOLFIRI Alone

Participants with mutant KRAS were randomized to FOLFIRI chemotherapy regimen administered in cycles every two weeks.

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

Analysis denominator · Participants

GroupSource count
Wild-type KRAS - Panitumumab Plus FOLFIRI297
Wild-type KRAS - FOLFIRI Alone285
Mutant KRAS - Panitumumab Plus FOLFIRI232
Mutant KRAS - FOLFIRI Alone237

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Wild-type KRAS - Panitumumab Plus FOLFIRI35.35Not reported29.9241.08Not reported
Wild-type KRAS - FOLFIRI Alone9.82Not reported6.6313.89Not reported
Mutant KRAS - Panitumumab Plus FOLFIRI13.36Not reported9.2618.43Not reported
Mutant KRAS - FOLFIRI Alone13.92Not reported9.7819.00Not reported

Source statistical analyses

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

  1. ci Lower Limit
    3.21
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    8.60
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus arm relative to the odds on the FOLFIRI alone arm.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    5.33
    statistical Comment
    Adjusted for ECOG score, prior bevacizumab exposure, prior oxaliplatin exposure.
    statistical Method
    Stratified exact test
  2. ci Lower Limit
    0.56
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.76
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus arm relative to the odds on the FOLFIRI alone arm.
    group Ids
    1. OG002
    2. OG003
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    p Value
    1.0000
    param Type
    Odds Ratio (OR)
    param Value
    1.00
    statistical Comment
    Adjusted for ECOG score, prior bevacizumab exposure, prior oxaliplatin exposure.
    statistical Method
    Stratified exact test
Complete source fields
analyses
  1. ci Lower Limit
    3.21
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    8.60
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus arm relative to the odds on the FOLFIRI alone arm.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    p Value
    <0.0001
    param Type
    Odds Ratio (OR)
    param Value
    5.33
    statistical Comment
    Adjusted for ECOG score, prior bevacizumab exposure, prior oxaliplatin exposure.
    statistical Method
    Stratified exact test
  2. ci Lower Limit
    0.56
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.76
    estimate Comment
    The odds ratio is defined as the odds of having an objective response in the panitumumab plus arm relative to the odds on the FOLFIRI alone arm.
    group Ids
    1. OG002
    2. OG003
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    p Value
    1.0000
    param Type
    Odds Ratio (OR)
    param Value
    1.00
    statistical Comment
    Adjusted for ECOG score, prior bevacizumab exposure, prior oxaliplatin exposure.
    statistical Method
    Stratified exact test
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        29.92
        upper Limit
        41.08
        value
        35.35
      2. group Id
        OG001
        lower Limit
        6.63
        upper Limit
        13.89
        value
        9.82
      3. group Id
        OG002
        lower Limit
        9.26
        upper Limit
        18.43
        value
        13.36
      4. group Id
        OG003
        lower Limit
        9.78
        upper Limit
        19.00
        value
        13.92
denoms
  1. counts
    1. group Id
      OG000
      value
      297
    2. group Id
      OG001
      value
      285
    3. group Id
      OG002
      value
      232
    4. group Id
      OG003
      value
      237
    units
    Participants
description
Participants were evaluated for tumor response per the modified Response Evaluation Criteria in Solid Tumors (RECIST) criteria every 8 weeks until disease progression. Objective response was defined as the incidence of either a confirmed complete or partial response (CR or PR) while on study, as determined by blinded independent central review and confirmed no less than 4-weeks after the criteria for response are first met. CR: Disappearance of all target and non-target lesions and no new lesions. PR: At least a 30% decrease in the sum of the longest diameter of target lesions and no progression of non-target or no new lesions, or, disappearance of all target lesions and the persistence of ≥ 1 non-target lesion not qualifying for either CR or progressive disease. Participants without a post-baseline assessment were considered non-responders.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants with wild-type KRAS were randomized to 6 mg/kg panitumumab plus FOLFIRI chemotherapy regimen administered in cycles every two weeks.
    id
    OG000
    title
    Wild-type KRAS - Panitumumab Plus FOLFIRI
  2. description
    Participants with wild-type KRAS were randomized to FOLFIRI chemotherapy regimen administered in cycles every two weeks.
    id
    OG001
    title
    Wild-type KRAS - FOLFIRI Alone
  3. description
    Participants with mutant KRAS were randomized to 6 mg/kg panitumumab plus FOLFIRI chemotherapy regimen administered in cycles every two weeks.
    id
    OG002
    title
    Mutant KRAS - Panitumumab Plus FOLFIRI
  4. description
    Participants with mutant KRAS were randomized to FOLFIRI chemotherapy regimen administered in cycles every two weeks.
    id
    OG003
    title
    Mutant KRAS - FOLFIRI Alone
param Type
NUMBER
population Description
KRAS Central Tumor Response Analysis Set: subset of participants with at least one uni-dimensionally measurable lesion per the modified RECIST criteria per blinded central radiology review for whom KRAS was assessed.
reporting Status
POSTED
time Frame
Every 8 weeks until disease progression up to the data cut-off date of 30 April 2009. Maximum time on follow-up was 33 months.
title
Percentage of Participants With an Objective Response
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Independent clinical review pending · Not medical advice