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NCT00122460 · OUTCOME

Duration of Response

Cetuximab (Erbitux) in Combination With Cisplatin or Carboplatin and 5-Fluorouracil in the First Line Treatment of Subjects With Recurrent and/or Metastatic Squamous Cell Carcinoma of the Head and Neck (EXTREME) · Source last updated 2014-07-23

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
time from first assessment of Complete Response or Partial Response to disease progression, death or last tumor assessment, reported between day of first patient randomised, 21 Dec 2004, until cut-off date 12 Mar 2007

What was measured

Time from first assessment of Complete Response or Partial Response to disease progression or death (within 60 days of last tumor assessment). Patients without event are censored on the date of last tumor assessment. Tumor assessments based on modified WHO criteria.

Analysis population: Analysis on ITT population (allocation to treatment groups as randomized). Analysis performed at clinical cut off date, determined by primary endpoint.

Groups in this outcome

Cetuximab Plus Chemotherapy

Subjects in will receive initial dose of 400 mg/m\^2 cetuximab (over 2 hours) followed by weekly doses of 250 mg/m\^2 (over 1 hour). All doses will be given by intravenous (IV) infusion. Subjects will receive either Cisplatin (100 mg/m\^2 on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks or Carboplatin (Area under the curve (AUC) 5 IV on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks.

Chemotherapy Alone

All doses will be given by IV infusion. Subjects will receive either Cisplatin (100 mg/m\^2 on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks or Carboplatin (AUC 5 IV on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 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
Cetuximab Plus Chemotherapy222
Chemotherapy Alone220

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Cetuximab Plus Chemotherapy5.6Not reported4.76.0Not reported
Chemotherapy Alone4.7Not reported3.55.9Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.497
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.168
    group Description
    To test the equality of duration of response between treatment groups, the two-sided stratified log-rank test (α=5%) was used taking strata used for randomization into account (previous CTX \[no vs. yes\] and KPS \[\<80 vs. ≥80\]). Median duration of response was estimated using the Kaplan-Meier method. The HR of cetuximab + CTX over CTX alone was calculated using the Cox proportional hazards model stratified by randomization strata.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    0.21
    param Type
    Hazard Ratio (HR)
    param Value
    0.762
    statistical Method
    Stratified Log Rank
    tested Non Inferiority
    false
Complete source fields
analyses
  1. ci Lower Limit
    0.497
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.168
    group Description
    To test the equality of duration of response between treatment groups, the two-sided stratified log-rank test (α=5%) was used taking strata used for randomization into account (previous CTX \[no vs. yes\] and KPS \[\<80 vs. ≥80\]). Median duration of response was estimated using the Kaplan-Meier method. The HR of cetuximab + CTX over CTX alone was calculated using the Cox proportional hazards model stratified by randomization strata.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    0.21
    param Type
    Hazard Ratio (HR)
    param Value
    0.762
    statistical Method
    Stratified Log Rank
    tested Non Inferiority
    false
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        4.7
        upper Limit
        6.0
        value
        5.6
      2. group Id
        OG001
        lower Limit
        3.5
        upper Limit
        5.9
        value
        4.7
denoms
  1. counts
    1. group Id
      OG000
      value
      222
    2. group Id
      OG001
      value
      220
    units
    Participants
description
Time from first assessment of Complete Response or Partial Response to disease progression or death (within 60 days of last tumor assessment). Patients without event are censored on the date of last tumor assessment. Tumor assessments based on modified WHO criteria.
dispersion Type
95% Confidence Interval
groups
  1. description
    Subjects in will receive initial dose of 400 mg/m\^2 cetuximab (over 2 hours) followed by weekly doses of 250 mg/m\^2 (over 1 hour). All doses will be given by intravenous (IV) infusion. Subjects will receive either Cisplatin (100 mg/m\^2 on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks or Carboplatin (Area under the curve (AUC) 5 IV on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks.
    id
    OG000
    title
    Cetuximab Plus Chemotherapy
  2. description
    All doses will be given by IV infusion. Subjects will receive either Cisplatin (100 mg/m\^2 on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks or Carboplatin (AUC 5 IV on day 1) + 5-FU (1000 mg/m\^2 continuous IV from day 1 to day 4) every 3 weeks.
    id
    OG001
    title
    Chemotherapy Alone
param Type
MEDIAN
population Description
Analysis on ITT population (allocation to treatment groups as randomized). Analysis performed at clinical cut off date, determined by primary endpoint.
reporting Status
POSTED
time Frame
time from first assessment of Complete Response or Partial Response to disease progression, death or last tumor assessment, reported between day of first patient randomised, 21 Dec 2004, until cut-off date 12 Mar 2007
title
Duration of Response
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice