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NCT02853305 · OUTCOME

PFS Using RECIST 1.1 as Assessed by BICR at 6 Months

Study of Pembrolizumab With or Without Platinum-based Combination Chemotherapy Versus Chemotherapy Alone in Urothelial Carcinoma (MK-3475-361/KEYNOTE-361) · Source last updated 2023-09-08

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

Measure
NUMBER
Unit
Percentage of Participants
Interval / dispersion
95% Confidence Interval
Time frame
6 months

What was measured

PFS was defined as the time from randomization to the first documented PD per RECIST 1.1 based on BICR, 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 was compared between arms as a pre-specified secondary analysis of the ITT population (all randomized participants). PFS is reported here for all participants at 6 months based on the product-limit (Kaplan-Meier) method for censored data.

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

Groups in this outcome

Pembrolizumab + ST Chemotherapy (Pembro Combo)

Participants received pembrolizumab 200 mg IV on Day 1 of each 3-week cycle for a maximum of 35 doses PLUS standard therapy (ST) chemotherapy with EITHER cisplatin 70 mg/m\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\^2 on Day 1 and Day 8 of each 3-week cycle, OR carboplatin at an area under the curve 5 (AUC 5) (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\^2 IV on Day 1 and Day 8 of each 3-week cycle.

Pembrolizumab (Pembro)

Participants received pembrolizumab 200 mg intravenously (IV) on Day 1 of each 3-week cycle for a maximum of 35 doses.

ST Chemotherapy (Chemo)

Participants received ST chemotherapy with EITHER cisplatin 70 mg/m\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\^2 on Day 1 and Day 8 of each 3-week cycle OR carboplatin at AUC 5 (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\^2 IV on Day 1 and Day 8 of each 3-week 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 + ST Chemotherapy (Pembro Combo)351
Pembrolizumab (Pembro)307
ST Chemotherapy (Chemo)352

Reported measurements

Source class 1
Values in Percentage of Participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Pembrolizumab + ST Chemotherapy (Pembro Combo)73.7Not reported68.678.0Not reported
Pembrolizumab (Pembro)43.6Not reported37.949.1Not reported
ST Chemotherapy (Chemo)70.3Not reported64.875.0Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        68.6
        upper Limit
        78.0
        value
        73.7
      2. group Id
        OG001
        lower Limit
        37.9
        upper Limit
        49.1
        value
        43.6
      3. group Id
        OG002
        lower Limit
        64.8
        upper Limit
        75.0
        value
        70.3
denoms
  1. counts
    1. group Id
      OG000
      value
      351
    2. group Id
      OG001
      value
      307
    3. group Id
      OG002
      value
      352
    units
    Participants
description
PFS was defined as the time from randomization to the first documented PD per RECIST 1.1 based on BICR, 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 was compared between arms as a pre-specified secondary analysis of the ITT population (all randomized participants). PFS is reported here for all participants at 6 months based on the product-limit (Kaplan-Meier) method for censored data.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received pembrolizumab 200 mg IV on Day 1 of each 3-week cycle for a maximum of 35 doses PLUS standard therapy (ST) chemotherapy with EITHER cisplatin 70 mg/m\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\^2 on Day 1 and Day 8 of each 3-week cycle, OR carboplatin at an area under the curve 5 (AUC 5) (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\^2 IV on Day 1 and Day 8 of each 3-week cycle.
    id
    OG000
    title
    Pembrolizumab + ST Chemotherapy (Pembro Combo)
  2. description
    Participants received pembrolizumab 200 mg intravenously (IV) on Day 1 of each 3-week cycle for a maximum of 35 doses.
    id
    OG001
    title
    Pembrolizumab (Pembro)
  3. description
    Participants received ST chemotherapy with EITHER cisplatin 70 mg/m\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\^2 on Day 1 and Day 8 of each 3-week cycle OR carboplatin at AUC 5 (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\^2 IV on Day 1 and Day 8 of each 3-week cycle.
    id
    OG002
    title
    ST Chemotherapy (Chemo)
param Type
NUMBER
population Description
All participants in the ITT population (all randomized) were analyzed.
reporting Status
POSTED
time Frame
6 months
title
PFS Using RECIST 1.1 as Assessed by BICR at 6 Months
type
SECONDARY
unit Of Measure
Percentage of Participants

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Preserved source evidence · Not medical advice