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NCT01412957 · OUTCOME

Progression Free Survival (PFS) in Participants With Wild-type RAS

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
MEDIAN
Unit
months
Interval / dispersion
95% Confidence Interval
Time frame
From randomization to the last on-study or long-term follow-up visit, as of the data cut-off date of 10 June 2014. The median follow-up time was 36.1 weeks (panitumumab plus BSC: 43.7 weeks; BSC alone: 23.6 weeks).

What was measured

PFS was defined as the time from the randomization date to the date of disease progression per RECIST version 1.1 or death. Progressive disease (PD): At least a 20% increase in the size of target lesions compared with the smallest size since treatment started and an absolute increase of at least 5 mm, any new lesions, or an increase in size of non-target lesions thought be ≥ 20% with an absolute increase of at least 5 mm, or significant increase in pleural effusions, ascites or other fluid collections with cytologic proof of malignancy. Participants who were alive and did not meet the criteria for progression by the analysis data cut-off date were censored at their last evaluable disease assessment date.

Analysis population: Wild-type RAS Efficacy 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 + BSC142
BSC Alone128

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Panitumumab + BSC5.2Not reported3.55.3Not reported
BSC Alone1.7Not reported1.62.2Not reported

Source statistical analyses

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

  1. estimate Comment
    A normal score \< 0 indicates fewer than expected events for the panitumumab plus BSC arm and therefore a longer time to event.
    group Description
    PFS in the Wild-type RAS Efficacy Analysis Set was to be compared at a significance level of 5% if overall survival in the wild-type RAS Efficacy Anaysis Set demonstrated a significant treatment effect.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    param Type
    Normal score
    param Value
    -5.98
    statistical Comment
    Log-rank test stratified by randomization factors: geographic region (Europe vs Asia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    statistical Method
    Log Rank
Complete source fields
analyses
  1. estimate Comment
    A normal score \< 0 indicates fewer than expected events for the panitumumab plus BSC arm and therefore a longer time to event.
    group Description
    PFS in the Wild-type RAS Efficacy Analysis Set was to be compared at a significance level of 5% if overall survival in the wild-type RAS Efficacy Anaysis Set demonstrated a significant treatment effect.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    param Type
    Normal score
    param Value
    -5.98
    statistical Comment
    Log-rank test stratified by randomization factors: geographic region (Europe vs Asia vs rest of world) and ECOG performance status (0 or 1 vs 2).
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        3.5
        upper Limit
        5.3
        value
        5.2
      2. group Id
        OG001
        lower Limit
        1.6
        upper Limit
        2.2
        value
        1.7
denoms
  1. counts
    1. group Id
      OG000
      value
      142
    2. group Id
      OG001
      value
      128
    units
    Participants
description
PFS was defined as the time from the randomization date to the date of disease progression per RECIST version 1.1 or death. Progressive disease (PD): At least a 20% increase in the size of target lesions compared with the smallest size since treatment started and an absolute increase of at least 5 mm, any new lesions, or an increase in size of non-target lesions thought be ≥ 20% with an absolute increase of at least 5 mm, or significant increase in pleural effusions, ascites or other fluid collections with cytologic proof of malignancy. Participants who were alive and did not meet the criteria for progression by the analysis data cut-off date were censored at their last evaluable disease assessment date.
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
MEDIAN
population Description
Wild-type RAS Efficacy Analysis Set
reporting Status
POSTED
time Frame
From randomization to the last on-study or long-term follow-up visit, as of the data cut-off date of 10 June 2014. The median follow-up time was 36.1 weeks (panitumumab plus BSC: 43.7 weeks; BSC alone: 23.6 weeks).
title
Progression Free Survival (PFS) in Participants With Wild-type RAS
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice