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NCT03189719 · OUTCOME

PFS Per RECIST 1.1 As Assessed By Investigator in All Participants

First-line Esophageal Carcinoma Study With Pembrolizumab Plus Chemo vs. Chemo (MK-3475-590/KEYNOTE-590) · Source last updated 2024-10-15

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
Up to approximately 34 months

What was measured

PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, PFS is reported here for all participants of the ITT population (all randomized).

Analysis population: All randomized participants (ITT population) were analyzed.

Groups in this outcome

Pembrolizumab + SOC

Participants received pembrolizumab 200 mg IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\^2 IV Q3W and 5-FU 800 mg/m\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.

Placebo + SOC

Participants received placebo to pembrolizumab (saline) IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\^2 IV Q3W and 5-FU 800 mg/m\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.

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

Analysis denominator · Participants

GroupSource count
Pembrolizumab + SOC373
Placebo + SOC376

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Pembrolizumab + SOC6.3Not reported6.26.9Not reported
Placebo + SOC5.8Not reported5.06.0Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.55
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.76
    group Description
    PFS in all participants of the pembrolizumab + SOC arm was compared to PFS in all participants of the placebo + SOC arm based on a Cox regression model with Efron's method of tie handling with treatment as a covariate stratified by geographic region (Asia versus Rest of the World), tumor histology (Adenocarcinoma versus Squamous Cell Carcinoma), and ECOG performance status (0 versus 1).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.65
    statistical Method
    Stratified Log-Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.55
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.76
    group Description
    PFS in all participants of the pembrolizumab + SOC arm was compared to PFS in all participants of the placebo + SOC arm based on a Cox regression model with Efron's method of tie handling with treatment as a covariate stratified by geographic region (Asia versus Rest of the World), tumor histology (Adenocarcinoma versus Squamous Cell Carcinoma), and ECOG performance status (0 versus 1).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.65
    statistical Method
    Stratified Log-Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        6.2
        upper Limit
        6.9
        value
        6.3
      2. group Id
        OG001
        lower Limit
        5.0
        upper Limit
        6.0
        value
        5.8
denoms
  1. counts
    1. group Id
      OG000
      value
      373
    2. group Id
      OG001
      value
      376
    units
    Participants
description
PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, PFS is reported here for all participants of the ITT population (all randomized).
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received pembrolizumab 200 mg IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\^2 IV Q3W and 5-FU 800 mg/m\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.
    id
    OG000
    title
    Pembrolizumab + SOC
  2. description
    Participants received placebo to pembrolizumab (saline) IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\^2 IV Q3W and 5-FU 800 mg/m\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.
    id
    OG001
    title
    Placebo + SOC
param Type
MEDIAN
population Description
All randomized participants (ITT population) were analyzed.
reporting Status
POSTED
time Frame
Up to approximately 34 months
title
PFS Per RECIST 1.1 As Assessed By Investigator in All Participants
type
PRIMARY
unit Of Measure
Months

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