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NCT03653507 · OUTCOME

Time to Confirmed Deterioration (TTCD) Using Oesophago-gastric Questionnaire (OG25) on Abdominal Pain and Discomfort as Measured by EORTC QLQ-OG25 Plus STO22 Belching Subscale

A Study of Zolbetuximab (IMAB362) Plus CAPOX Compared With Placebo Plus CAPOX as First-line Treatment of Subjects With Claudin (CLDN) 18.2-positive, HER2-negative, Locally Advanced Unresectable or Metastatic Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma (GLOW). · Source last updated 2026-07-16

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 the date of randomization until 61 months and 12 days

What was measured

TTCD:time from randomization to first CMFD confirmed at next scheduled visit.OG25 evaluated gastric \& gastroesophageal junction cancer-specific symptoms,had 25 items with 6 scales:dysphagia,eating restrictions,reflux,odynophagia,pain, discomfort,anxiety,and 10 single items:trouble with(taste, swallowing saliva, coughing, talking),eating in front of others,dry mouth,body image,choked when swallowing,weight loss and hair loss. STO22: gastric cancer quality of life questionnaire with 22 questions.For OG25 and STO22,items scored on(1:not at all; 2:a little, 3:quite a bit, 4:very much) and 1 question was "yes or no" for STO22.Linear transformation was used; score ranged from 0 to 100; higher score=better level of functioning or greater degree of symptoms. An item from STO22 instrument related to belching was used with OG25. CMFD: if participant's CFB exceeded pre-specified threshold (per investigator's discretion) denoting a clinically meaningful change. Kaplan-Meier estimates was used

Analysis population: FAS

Groups in this outcome

CAPOX+ Zolbetuximab

Participants received an intravenous (IV) infusion (as a minimum of 2-hour infusion) of zolbetuximab at a loading dose of 800 milligrams per square meter (mg/m\^2) on cycle 1 day 1 (C1D1) followed by subsequent doses of 600 mg/m\^2 every 3 weeks starting from C2D1 until participant met study treatment discontinuation criteria. Participants also received up to 8 treatments of capecitabine and oxaliplatin (CAPOX) treatment. Oxaliplatin was administered 130 mg/m\^2 IV on day 1 of each cycle over 2 hours for a maximum of 8 treatments; Capecitabine was administered orally at 1000 mg/m\^2 twice daily (bid) on days 1 through 14 of each cycle until the participant met study treatment discontinuation criteria. After a maximum of 8 treatments of oxaliplatin, participants may have continued to receive capecitabine taken twice daily on days 1 through 14 of each cycle at the investigator's discretion until the participant met study treatment discontinuation criteria. Each cycle was approximately 21

CAPOX+ Placebo

Participants received an IV infusion (as a minimum of 2-hour infusion) of placebo matched to zolbetuximab on C1D1 followed by subsequent doses every 3 weeks starting from C2D1 until participant met study treatment discontinuation criteria. Participants also received up to 8 treatments of CAPOX. Oxaliplatin was administered 130 mg/m\^2 IV on day 1 of each cycle over 2 hours for a maximum of 8 treatments; Capecitabine was administered orally at 1000 mg/m\^2 bid on days 1 through 14 of each cycle until the participant met study treatment discontinuation criteria. After a maximum of 8 treatments of oxaliplatin, participants may have continued to receive capecitabine taken twice daily on days 1 through 14 of each cycle at the investigator's discretion until the participant met study treatment discontinuation criteria. Each cycle was approximately 21 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
CAPOX+ Zolbetuximab254
CAPOX+ Placebo253

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
CAPOX+ ZolbetuximabNANot reported28.16NAData was not estimable because less than 50% of participants had event (data was estimated using KM and it requires at least 50% of event to be able to calculate time using KM.
CAPOX+ Placebo25.82Not reported18.46NAThe lower bound of the confidence interval for the median survival time may not be estimable, even if the median itself can be calculated, in scenarios with significant early censoring and a limited number of events

Source statistical analyses

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

  1. ci Lower Limit
    0.673
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.577
    estimate 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)
    group Ids
    1. OG000
    non Inferiority Type
    SUPERIORITY
    p Value
    0.4478
    param Type
    Hazard Ratio (HR)
    param Value
    1.030
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.673
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.577
    estimate 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)
    group Ids
    1. OG000
    non Inferiority Type
    SUPERIORITY
    p Value
    0.4478
    param Type
    Hazard Ratio (HR)
    param Value
    1.030
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. comment
        Data was not estimable because less than 50% of participants had event (data was estimated using KM and it requires at least 50% of event to be able to calculate time using KM.
        group Id
        OG000
        lower Limit
        28.16
        upper Limit
        NA
        value
        NA
      2. comment
        The lower bound of the confidence interval for the median survival time may not be estimable, even if the median itself can be calculated, in scenarios with significant early censoring and a limited number of events
        group Id
        OG001
        lower Limit
        18.46
        upper Limit
        NA
        value
        25.82
denoms
  1. counts
    1. group Id
      OG000
      value
      254
    2. group Id
      OG001
      value
      253
    units
    Participants
description
TTCD:time from randomization to first CMFD confirmed at next scheduled visit.OG25 evaluated gastric \& gastroesophageal junction cancer-specific symptoms,had 25 items with 6 scales:dysphagia,eating restrictions,reflux,odynophagia,pain, discomfort,anxiety,and 10 single items:trouble with(taste, swallowing saliva, coughing, talking),eating in front of others,dry mouth,body image,choked when swallowing,weight loss and hair loss. STO22: gastric cancer quality of life questionnaire with 22 questions.For OG25 and STO22,items scored on(1:not at all; 2:a little, 3:quite a bit, 4:very much) and 1 question was "yes or no" for STO22.Linear transformation was used; score ranged from 0 to 100; higher score=better level of functioning or greater degree of symptoms. An item from STO22 instrument related to belching was used with OG25. CMFD: if participant's CFB exceeded pre-specified threshold (per investigator's discretion) denoting a clinically meaningful change. Kaplan-Meier estimates was used
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received an intravenous (IV) infusion (as a minimum of 2-hour infusion) of zolbetuximab at a loading dose of 800 milligrams per square meter (mg/m\^2) on cycle 1 day 1 (C1D1) followed by subsequent doses of 600 mg/m\^2 every 3 weeks starting from C2D1 until participant met study treatment discontinuation criteria. Participants also received up to 8 treatments of capecitabine and oxaliplatin (CAPOX) treatment. Oxaliplatin was administered 130 mg/m\^2 IV on day 1 of each cycle over 2 hours for a maximum of 8 treatments; Capecitabine was administered orally at 1000 mg/m\^2 twice daily (bid) on days 1 through 14 of each cycle until the participant met study treatment discontinuation criteria. After a maximum of 8 treatments of oxaliplatin, participants may have continued to receive capecitabine taken twice daily on days 1 through 14 of each cycle at the investigator's discretion until the participant met study treatment discontinuation criteria. Each cycle was approximately 21
    id
    OG000
    title
    CAPOX+ Zolbetuximab
  2. description
    Participants received an IV infusion (as a minimum of 2-hour infusion) of placebo matched to zolbetuximab on C1D1 followed by subsequent doses every 3 weeks starting from C2D1 until participant met study treatment discontinuation criteria. Participants also received up to 8 treatments of CAPOX. Oxaliplatin was administered 130 mg/m\^2 IV on day 1 of each cycle over 2 hours for a maximum of 8 treatments; Capecitabine was administered orally at 1000 mg/m\^2 bid on days 1 through 14 of each cycle until the participant met study treatment discontinuation criteria. After a maximum of 8 treatments of oxaliplatin, participants may have continued to receive capecitabine taken twice daily on days 1 through 14 of each cycle at the investigator's discretion until the participant met study treatment discontinuation criteria. Each cycle was approximately 21 days.
    id
    OG001
    title
    CAPOX+ Placebo
param Type
MEDIAN
population Description
FAS
reporting Status
POSTED
time Frame
From the date of randomization until 61 months and 12 days
title
Time to Confirmed Deterioration (TTCD) Using Oesophago-gastric Questionnaire (OG25) on Abdominal Pain and Discomfort as Measured by EORTC QLQ-OG25 Plus STO22 Belching Subscale
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice