Skip to content
← Full study record

NCT03504397 · OUTCOME

Progression Free Survival (PFS)

A Study to Compare Zolbetuximab (IMAB362) and Chemotherapy With Placebo and Chemotherapy in Adults With Gastric Cancer. · Source last updated 2026-05-04

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 until the date of first documented radiological progression or date of death from any cause, whichever occurred first (up to 62 months and 18 days)

What was measured

PFS was defined as the time from the date of randomization until the date of radiological progressive disease (PD) (per Response Evaluation Criteria in Solid Tumors \[RECIST\] 1.1 by independent review committee \[IRC\]) or death from any cause, whichever was earliest. PD was defined as development of new, or progression of existing metastases to the primary cancer under the study. Kaplan -Meier (KM) estimates was used.

Analysis population: FAS

Groups in this outcome

mFOLFOX6 + Zolbetuximab

Participants received an IV infusion (as a minimum of 2-hour infusion) of zolbetuximab at a loading dose of 800 mg/m\^2 on C1D1 followed by subsequent doses of 600 mg/m\^2 every 3 weeks starting from C1D22 until participant meets study treatment discontinuation criteria. Participants also received up to 12 treatments of 5-fluorouracil, folinic acid and oxaliplatin (mFOLFOX6) (or components of mFOLFOX6 if some components were discontinued due to toxicity) over 4 or more cycles in which mFOLFOX6 was administered on Days 1, 15 and 29 of each cycle (5-fluorouracil administered by IV bolus 400 mg/m\^2 over 5 to 15 minutes followed by 2400mg/m\^2 over 46-48 hours continuous IV infusion every 2 weeks for 4 cycles. Folinic acid administered 400 mg/m\^2 IV infusion over 2 hours; oxaliplatin administered 85 mg/m\^2 IV infusion over 2 hours). A maximum of 12 doses of oxaliplatin was permitted. After mFOLFOX6 treatments, participants could continue to receive 5-FU and folinic acid on Days 1, 15 and 29 of each cycle at the investigator's discretion or until the participant met the study treatment discontinuation criteria. Each cycle was approximately 42 days.

mFOLFOX6+ Placebo

Participants received an IV infusion (minimum 2-hour infusion) of placebo matched to zolbetuximab on C1D1, followed by subsequent doses every 3 weeks starting from C1D22 until study treatment discontinuation criteria were met. Participants also received up to 12 treatments of mFOLFOX6 (or components if some were discontinued due to toxicity) over 4 or more cycles. mFOLFOX6 was administered on Days 1, 15, and 29 of each cycle (5-fluorouracil: 400 mg/m\^2 IV bolus over 5-15 minutes followed by 2400mg/m\^2 over 46-48 hours continuous IV infusion every 2 weeks for 4 cycles. Folinic acid: 400 mg/m\^2 IV infusion over 2 hours; oxaliplatin: 85 mg/m\^2 IV infusion over 2 hours). A maximum of 12 doses of oxaliplatin was permitted. After mFOLFOX6 treatments, participants could continue to receive 5-FU and folinic acid on Days 1, 15, and 29 of each cycle at the investigator's discretion or until study treatment discontinuation criteria were met. Each cycle was approximately 42 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
mFOLFOX6 + Zolbetuximab283
mFOLFOX6+ Placebo282

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
mFOLFOX6 + Zolbetuximab11.04Not reported9.6912.52Not reported
mFOLFOX6+ Placebo8.94Not reported8.2110.41Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.591
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.910
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0024
    p Value Comment
    Log-rank test stratified by: * Region (Asia vs Non-Asia) * Number of organs with metastatic sites (0 to 2 vs ≥ 3) * Prior gastrectomy (Yes or No)
    param Type
    Hazard Ratio (HR)
    param Value
    0.734
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.591
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.910
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0024
    p Value Comment
    Log-rank test stratified by: * Region (Asia vs Non-Asia) * Number of organs with metastatic sites (0 to 2 vs ≥ 3) * Prior gastrectomy (Yes or No)
    param Type
    Hazard Ratio (HR)
    param Value
    0.734
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        9.69
        upper Limit
        12.52
        value
        11.04
      2. group Id
        OG001
        lower Limit
        8.21
        upper Limit
        10.41
        value
        8.94
denoms
  1. counts
    1. group Id
      OG000
      value
      283
    2. group Id
      OG001
      value
      282
    units
    Participants
description
PFS was defined as the time from the date of randomization until the date of radiological progressive disease (PD) (per Response Evaluation Criteria in Solid Tumors \[RECIST\] 1.1 by independent review committee \[IRC\]) or death from any cause, whichever was earliest. PD was defined as development of new, or progression of existing metastases to the primary cancer under the study. Kaplan -Meier (KM) estimates was used.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received an IV infusion (as a minimum of 2-hour infusion) of zolbetuximab at a loading dose of 800 mg/m\^2 on C1D1 followed by subsequent doses of 600 mg/m\^2 every 3 weeks starting from C1D22 until participant meets study treatment discontinuation criteria. Participants also received up to 12 treatments of 5-fluorouracil, folinic acid and oxaliplatin (mFOLFOX6) (or components of mFOLFOX6 if some components were discontinued due to toxicity) over 4 or more cycles in which mFOLFOX6 was administered on Days 1, 15 and 29 of each cycle (5-fluorouracil administered by IV bolus 400 mg/m\^2 over 5 to 15 minutes followed by 2400mg/m\^2 over 46-48 hours continuous IV infusion every 2 weeks for 4 cycles. Folinic acid administered 400 mg/m\^2 IV infusion over 2 hours; oxaliplatin administered 85 mg/m\^2 IV infusion over 2 hours). A maximum of 12 doses of oxaliplatin was permitted. After mFOLFOX6 treatments, participants could continue to receive 5-FU and folinic acid on Days 1, 15 and 29 of each cycle at the investigator's discretion or until the participant met the study treatment discontinuation criteria. Each cycle was approximately 42 days.
    id
    OG000
    title
    mFOLFOX6 + Zolbetuximab
  2. description
    Participants received an IV infusion (minimum 2-hour infusion) of placebo matched to zolbetuximab on C1D1, followed by subsequent doses every 3 weeks starting from C1D22 until study treatment discontinuation criteria were met. Participants also received up to 12 treatments of mFOLFOX6 (or components if some were discontinued due to toxicity) over 4 or more cycles. mFOLFOX6 was administered on Days 1, 15, and 29 of each cycle (5-fluorouracil: 400 mg/m\^2 IV bolus over 5-15 minutes followed by 2400mg/m\^2 over 46-48 hours continuous IV infusion every 2 weeks for 4 cycles. Folinic acid: 400 mg/m\^2 IV infusion over 2 hours; oxaliplatin: 85 mg/m\^2 IV infusion over 2 hours). A maximum of 12 doses of oxaliplatin was permitted. After mFOLFOX6 treatments, participants could continue to receive 5-FU and folinic acid on Days 1, 15, and 29 of each cycle at the investigator's discretion or until study treatment discontinuation criteria were met. Each cycle was approximately 42 days.
    id
    OG001
    title
    mFOLFOX6+ Placebo
param Type
MEDIAN
population Description
FAS
reporting Status
POSTED
time Frame
From date of randomization until the date of first documented radiological progression or date of death from any cause, whichever occurred first (up to 62 months and 18 days)
title
Progression Free Survival (PFS)
type
PRIMARY
unit Of Measure
Months

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice