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NCT01001377 · OUTCOME

Overall Survival

ASPECCT: A Study of Panitumumab Efficacy and Safety Compared to Cetuximab in Patients With KRAS Wild-Type Metastatic Colorectal Cancer · Source last updated 2022-09-21

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 randomization until the data cut-off date of 5 February 2013. Maximum time on study was 155 weeks.

What was measured

Overall survival is the time from the date of randomization until the date of death. Participants who had not died by the analysis data cut-off date were censored at their last contact date.

Analysis population: Primary Analysis Set: All participants who were randomized and who received at least 1 dose of panitumumab or cetuximab; analyzed according to randomized treatment arm.

Groups in this outcome

Cetuximab

Cetuximab 400 mg/m\^2 as an initial dose, followed by 250 mg/m\^2 intravenously (IV) every 7 days.

Panitumumab

Panitumumab 6 mg/kg IV every 14 days.

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

Analysis denominator · Participants

GroupSource count
Cetuximab500
Panitumumab499

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Cetuximab10.0Not reported9.311.0Not reported
Panitumumab10.4Not reported9.411.6Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.839
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.113
    estimate Comment
    Hazard ratio is presented as panitumumab : cetuximab. A value \< 1.0 indicates a lower average event rate and longer time to event for panitumumab relative to cetuximab.
    group Description
    Cox proportional hazards model stratified by geographic region (North America, western Europe and Australia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    param Type
    Stratified Cox proportional hazard ratio
    param Value
    0.966
  2. group Description
    A synthesis approach with an asymptotic standard normal test statistic based on the logarithm of the hazard ratio was used to test the hypothesis that panitumumab is non-inferior to cetuximab for overall survival (ie, that panitumumab retains at least 50% of the overall survival benefit of cetuximab relative to best supportive care).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    The overall survival non-inferiority hypothesis based on an asymptotic normal score was tested at a 1-sided 2.5% significance level. A value \< -1.96 indicates non-inferiority at a significance level of 1-sided 0.025.
    non Inferiority Type
    NON_INFERIORITY_OR_EQUIVALENCE_LEGACY
    p Value
    0.0007
    p Value Comment
    A synthesis approach with an asymptotic standard normal test statistic
    param Type
    Normal score
    param Value
    -3.19
    statistical Method
    Asymptotic standard normal test
Complete source fields
analyses
  1. ci Lower Limit
    0.839
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.113
    estimate Comment
    Hazard ratio is presented as panitumumab : cetuximab. A value \< 1.0 indicates a lower average event rate and longer time to event for panitumumab relative to cetuximab.
    group Description
    Cox proportional hazards model stratified by geographic region (North America, western Europe and Australia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER_LEGACY
    param Type
    Stratified Cox proportional hazard ratio
    param Value
    0.966
  2. group Description
    A synthesis approach with an asymptotic standard normal test statistic based on the logarithm of the hazard ratio was used to test the hypothesis that panitumumab is non-inferior to cetuximab for overall survival (ie, that panitumumab retains at least 50% of the overall survival benefit of cetuximab relative to best supportive care).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    The overall survival non-inferiority hypothesis based on an asymptotic normal score was tested at a 1-sided 2.5% significance level. A value \< -1.96 indicates non-inferiority at a significance level of 1-sided 0.025.
    non Inferiority Type
    NON_INFERIORITY_OR_EQUIVALENCE_LEGACY
    p Value
    0.0007
    p Value Comment
    A synthesis approach with an asymptotic standard normal test statistic
    param Type
    Normal score
    param Value
    -3.19
    statistical Method
    Asymptotic standard normal test
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        9.3
        upper Limit
        11.0
        value
        10.0
      2. group Id
        OG001
        lower Limit
        9.4
        upper Limit
        11.6
        value
        10.4
denoms
  1. counts
    1. group Id
      OG000
      value
      500
    2. group Id
      OG001
      value
      499
    units
    Participants
description
Overall survival is the time from the date of randomization until the date of death. Participants who had not died by the analysis data cut-off date were censored at their last contact date.
dispersion Type
95% Confidence Interval
groups
  1. description
    Cetuximab 400 mg/m\^2 as an initial dose, followed by 250 mg/m\^2 intravenously (IV) every 7 days.
    id
    OG000
    title
    Cetuximab
  2. description
    Panitumumab 6 mg/kg IV every 14 days.
    id
    OG001
    title
    Panitumumab
param Type
MEDIAN
population Description
Primary Analysis Set: All participants who were randomized and who received at least 1 dose of panitumumab or cetuximab; analyzed according to randomized treatment arm.
reporting Status
POSTED
time Frame
From randomization until the data cut-off date of 5 February 2013. Maximum time on study was 155 weeks.
title
Overall Survival
type
PRIMARY
unit Of Measure
months

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Preserved source evidence · Not medical advice