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NCT00069095 · OUTCOME

PFS (On-treatment Approach): Non-inferiority of XELOX Versus FOLFOX-4

A Study of Capecitabine (Xeloda) and Bevacizumab as a First-line Therapy in Patients With Metastatic Colorectal Cancer · Source last updated 2016-10-06

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
MEDIAN
Unit
days
Interval / dispersion
95% Confidence Interval
Time frame
Baseline until disease progression or death, approximately 2 years 6 months

What was measured

PFS is defined as the time from randomization to disease progression (PD) or death due to any cause. The on-treatment analysis included only tumor assessments and death events that occurred no later than 28 days after the last confirmed intake of any study medication in the primary study treatment phase. Participants who did not have an event during this interval were censored at the date of the last tumor assessment within this time window, or on day 1 if no tumor assessment was available after baseline. Participants who underwent surgical resection with curative intent without prior progression within 28 days after the last confirmed intake of any study medication in the primary study treatment phase were censored at the date of surgery. The on-treatment approach excluded the possible impact of other treatments that might have been started before disease progression. Non-inferiority of the XELOX-containing arms was compared with the FOLFOX-4-containing arms.

Analysis population: The EPP excluded participants from the ITT who had violated major protocol inclusion or exclusion criteria or participants who were randomized and did not receive at least one dose of capecitabine, 5-FU, oxaliplatin, or bevacizumab/placebo.

Groups in this outcome

FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV

Participants from the initial 2-arm part and the 2x2 factorial part of the study including the following groups - 1. Folfox-4: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin (given on day 1). 2. Folfox-4+P: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin and placebo control for bevacizumab (both given on day 1 every 2 weeks). 3. Folfox-4+BV: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin and intravenous bevacizumab (both given on day 1 every 2 weeks).

XELOX/XELOX+P/XELOX+BV

Participants from the initial 2-arm part and the 2x2 factorial part of the study including the following groups - 1. Xelox: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin (given on day 1). 2. Xelox+P: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin and placebo (P) control for bevacizumab (both given on day 1 every 3 weeks). 3. Xelox+BV: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin and intravenous bevacizumab (both given on day 1 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
FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV937
XELOX/XELOX+P/XELOX+BV967

Reported measurements

Source class 1
Values in days · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV268.0Not reported252290Not reported
XELOX/XELOX+P/XELOX+BV234.0Not reported221251Not reported

Source statistical analyses

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

  1. ci Lower Limit
    1.07
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    97.5
    ci Upper Limit
    1.44
    group Description
    HRs and 97.5% confidence interval were reported for treatment arm A (XELOX/XELOX+P/XELOX+BV) versus treatment arm B (FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    Fewer events were expected in the 'on-treatment analysis', thus leading to reduced power. No formal statistical testing was therefore applied.
    non Inferiority Type
    NON_INFERIORITY_OR_EQUIVALENCE
    param Type
    Hazard Ratio (HR)
    param Value
    1.24
    tested Non Inferiority
    true
Complete source fields
analyses
  1. ci Lower Limit
    1.07
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    97.5
    ci Upper Limit
    1.44
    group Description
    HRs and 97.5% confidence interval were reported for treatment arm A (XELOX/XELOX+P/XELOX+BV) versus treatment arm B (FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    Fewer events were expected in the 'on-treatment analysis', thus leading to reduced power. No formal statistical testing was therefore applied.
    non Inferiority Type
    NON_INFERIORITY_OR_EQUIVALENCE
    param Type
    Hazard Ratio (HR)
    param Value
    1.24
    tested Non Inferiority
    true
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        252
        upper Limit
        290
        value
        268.0
      2. group Id
        OG001
        lower Limit
        221
        upper Limit
        251
        value
        234.0
denoms
  1. counts
    1. group Id
      OG000
      value
      937
    2. group Id
      OG001
      value
      967
    units
    Participants
description
PFS is defined as the time from randomization to disease progression (PD) or death due to any cause. The on-treatment analysis included only tumor assessments and death events that occurred no later than 28 days after the last confirmed intake of any study medication in the primary study treatment phase. Participants who did not have an event during this interval were censored at the date of the last tumor assessment within this time window, or on day 1 if no tumor assessment was available after baseline. Participants who underwent surgical resection with curative intent without prior progression within 28 days after the last confirmed intake of any study medication in the primary study treatment phase were censored at the date of surgery. The on-treatment approach excluded the possible impact of other treatments that might have been started before disease progression. Non-inferiority of the XELOX-containing arms was compared with the FOLFOX-4-containing arms.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants from the initial 2-arm part and the 2x2 factorial part of the study including the following groups - 1. Folfox-4: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin (given on day 1). 2. Folfox-4+P: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin and placebo control for bevacizumab (both given on day 1 every 2 weeks). 3. Folfox-4+BV: Participants who received 2-week cycles of infused leucovorin, bolus injection fluorouracil and continuous infusion fluorouracil (given on days 1 and 2), combined with intravenous oxaliplatin and intravenous bevacizumab (both given on day 1 every 2 weeks).
    id
    OG000
    title
    FOLFOX-4/FOLFOX-4+P/FOLFOX-4+BV
  2. description
    Participants from the initial 2-arm part and the 2x2 factorial part of the study including the following groups - 1. Xelox: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin (given on day 1). 2. Xelox+P: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin and placebo (P) control for bevacizumab (both given on day 1 every 3 weeks). 3. Xelox+BV: Capecitabine was administered as an oral twice-daily outpatient intermittent treatment (3-week cycles consisting of 2 weeks of treatment followed by 1 week without treatment) combined with intravenous oxaliplatin and intravenous bevacizumab (both given on day 1 every 3 weeks).
    id
    OG001
    title
    XELOX/XELOX+P/XELOX+BV
param Type
MEDIAN
population Description
The EPP excluded participants from the ITT who had violated major protocol inclusion or exclusion criteria or participants who were randomized and did not receive at least one dose of capecitabine, 5-FU, oxaliplatin, or bevacizumab/placebo.
reporting Status
POSTED
time Frame
Baseline until disease progression or death, approximately 2 years 6 months
title
PFS (On-treatment Approach): Non-inferiority of XELOX Versus FOLFOX-4
type
SECONDARY
unit Of Measure
days

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Preserved source evidence · Not medical advice