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NCT04607421 · OUTCOME

SLI: PFS as Assessed by Investigator According to Line of Therapy - FAS

A Study of Encorafenib Plus Cetuximab With or Without Chemotherapy in People With Previously Untreated Metastatic Colorectal Cancer · Source last updated 2026-06-11

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 date of randomization to earliest documentation of PD or death or censoring date, whichever occurred first (maximum up to 33.9 months)

What was measured

PFS: time from date of randomization to earliest documented PD per RECIST version 1.1 or death due to any cause as assessed by response reported by investigator on eCRF. PD: 20% increase in sum of diameters of target measurable lesions above smallest sum observed, with minimum absolute increase of 5 mm for target disease or unequivocal progression of pre-existing lesions for non-target disease or any new lesion. Censoring details: no adequate baseline assessment, including no disease at baseline: participants were censored to randomization date; no PD, lost to follow-up, withdrawal of consent, PD or death \>12 (or 16) weeks after the last adequate tumor assessment, and start of new anticancer treatment: participants were censored to last adequate tumor assessment documenting no PD prior to new anticancer therapy, or missed assessments. Participants with PFS for first line and second line were presented. Analysis performed using Kaplan Meier method.

Analysis population: The FAS for SLI included all participants who were randomized in the SLI portion of the study. Here, "Number Analyzed" signifies participants evaluable for specified rows. All participants under "Overall Number of Participants Analyzed" contributed data to the table but may not have data evaluable for each row.

Groups in this outcome

SLI: Cohort 1 [EC + FOLFIRI]

Participants received encorafenib 300 milligrams (mg) once daily (QD) orally (received after Cycle 1 Day 3) and cetuximab 500 mg per square meters (mg/m\^2) intravenous (IV) infusion for 120 minutes once every 2 weeks (Q2W) along with fluorouracil 400 mg/m\^2 IV bolus then 2400 mg/m\^2 continuous IV infusion over 46-48 hours Q2W; leucovorin 400 mg/m\^2 IV infusion for 120 minutes Q2W and irinotecan 180 mg/m\^2 as IV infusion for 90 minutes Q2W. Participants received treatment in 28-day cycles.

SLI: Cohort 2 [EC + mFOLFOX6]

Participants received encorafenib 300 mg QD orally and cetuximab 500 mg/m\^2 IV infusion for 120 minutes Q2W along with fluorouracil 400 mg/m\^2 IV bolus then 2400 mg/m\^2 continuous IV infusion over 46-48 hours Q2W; leucovorin 400 mg/m\^2 IV infusion for 120 minutes Q2W and oxaliplatin 85 mg/m\^2 IV infusion for 120 minutes Q2W. Participants received treatment in 28-day cycles.

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

Analysis denominator · Participants

GroupSource count
SLI: Cohort 1 [EC + FOLFIRI]30
SLI: Cohort 2 [EC + mFOLFOX6]27

Reported measurements

First Line Treatment

Analysis denominator · Participants

GroupSource count
SLI: Cohort 1 [EC + FOLFIRI]12
SLI: Cohort 2 [EC + mFOLFOX6]19
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
SLI: Cohort 1 [EC + FOLFIRI]NANot reported15.3NAMedian and upper limit of 95% confidence interval (CI) could not be estimated due to insufficient number of participants with events.
SLI: Cohort 2 [EC + mFOLFOX6]9.9Not reported6.421.9Not reported
Second Line Treatment

Analysis denominator · Participants

GroupSource count
SLI: Cohort 1 [EC + FOLFIRI]18
SLI: Cohort 2 [EC + mFOLFOX6]8
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
SLI: Cohort 1 [EC + FOLFIRI]13.8Not reported4.915.9Not reported
SLI: Cohort 2 [EC + mFOLFOX6]9.0Not reported6.912.4Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        Median and upper limit of 95% confidence interval (CI) could not be estimated due to insufficient number of participants with events.
        group Id
        OG000
        lower Limit
        15.3
        upper Limit
        NA
        value
        NA
      2. group Id
        OG001
        lower Limit
        6.4
        upper Limit
        21.9
        value
        9.9
    denoms
    1. counts
      1. group Id
        OG000
        value
        12
      2. group Id
        OG001
        value
        19
      units
      Participants
    title
    First Line Treatment
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        4.9
        upper Limit
        15.9
        value
        13.8
      2. group Id
        OG001
        lower Limit
        6.9
        upper Limit
        12.4
        value
        9.0
    denoms
    1. counts
      1. group Id
        OG000
        value
        18
      2. group Id
        OG001
        value
        8
      units
      Participants
    title
    Second Line Treatment
denoms
  1. counts
    1. group Id
      OG000
      value
      30
    2. group Id
      OG001
      value
      27
    units
    Participants
description
PFS: time from date of randomization to earliest documented PD per RECIST version 1.1 or death due to any cause as assessed by response reported by investigator on eCRF. PD: 20% increase in sum of diameters of target measurable lesions above smallest sum observed, with minimum absolute increase of 5 mm for target disease or unequivocal progression of pre-existing lesions for non-target disease or any new lesion. Censoring details: no adequate baseline assessment, including no disease at baseline: participants were censored to randomization date; no PD, lost to follow-up, withdrawal of consent, PD or death \>12 (or 16) weeks after the last adequate tumor assessment, and start of new anticancer treatment: participants were censored to last adequate tumor assessment documenting no PD prior to new anticancer therapy, or missed assessments. Participants with PFS for first line and second line were presented. Analysis performed using Kaplan Meier method.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received encorafenib 300 milligrams (mg) once daily (QD) orally (received after Cycle 1 Day 3) and cetuximab 500 mg per square meters (mg/m\^2) intravenous (IV) infusion for 120 minutes once every 2 weeks (Q2W) along with fluorouracil 400 mg/m\^2 IV bolus then 2400 mg/m\^2 continuous IV infusion over 46-48 hours Q2W; leucovorin 400 mg/m\^2 IV infusion for 120 minutes Q2W and irinotecan 180 mg/m\^2 as IV infusion for 90 minutes Q2W. Participants received treatment in 28-day cycles.
    id
    OG000
    title
    SLI: Cohort 1 [EC + FOLFIRI]
  2. description
    Participants received encorafenib 300 mg QD orally and cetuximab 500 mg/m\^2 IV infusion for 120 minutes Q2W along with fluorouracil 400 mg/m\^2 IV bolus then 2400 mg/m\^2 continuous IV infusion over 46-48 hours Q2W; leucovorin 400 mg/m\^2 IV infusion for 120 minutes Q2W and oxaliplatin 85 mg/m\^2 IV infusion for 120 minutes Q2W. Participants received treatment in 28-day cycles.
    id
    OG001
    title
    SLI: Cohort 2 [EC + mFOLFOX6]
param Type
MEDIAN
population Description
The FAS for SLI included all participants who were randomized in the SLI portion of the study. Here, "Number Analyzed" signifies participants evaluable for specified rows. All participants under "Overall Number of Participants Analyzed" contributed data to the table but may not have data evaluable for each row.
reporting Status
POSTED
time Frame
From date of randomization to earliest documentation of PD or death or censoring date, whichever occurred first (maximum up to 33.9 months)
title
SLI: PFS as Assessed by Investigator According to Line of Therapy - FAS
type
SECONDARY
unit Of Measure
Months

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