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NCT03517449 · OUTCOME

ORR in All-comer Participants

Lenvatinib in Combination With Pembrolizumab Versus Treatment of Physician's Choice in Participants With Advanced Endometrial Cancer (MK-3475-775/E7080-G000-309 Per Merck Standard Convention [KEYNOTE-775]) · Source last updated 2026-03-19

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
Up to approximately 80 months

What was measured

ORR was defined as the percentage of participants who had best overall response of either complete response (CR) or partial response (PR) as determined by BICR per RECIST 1.1. CR was defined as the disappearance of all target and non-target lesions (non-lymph nodes). All pathological lymph nodes (whether target or non-target) must have a reduction in their short axis to less than (\<) 10mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters.

Analysis population: Analysis population consisted of ITT population which included all randomized participants.

Groups in this outcome

Lenvatinib 20 mg + Pembrolizumab 200 mg

Participants with Endometrial cancer (EC) received lenvatinib 20 milligrams (mg) orally, once daily, plus pembrolizumab 200 mg intravenously, every 3 weeks in each 21-day cycle. Participants continued to receive treatment until disease progression, development of unacceptable toxicity, withdrawal of consent, completion of 35 treatments (approximately 2 years) with pembrolizumab, or sponsor termination of the study

Treatment of Physician's Choice(TPC):Doxorubicin or Paclitaxel

Participants with EC received either doxorubicin 60 milligrams per square meter (mg/m\^2) intravenously, every 3 weeks, in each 21-day treatment cycle, or paclitaxel 80 mg/m\^2 intravenously, weekly (3 weeks on/1 week off), in each 28-day treatment cycle. Participants continued to receive treatment until a lifetime cumulative dose of 500 mg/m\^2 doxorubicin, a maximum dose of paclitaxel per standard of care, or until disease progression, development of unacceptable toxicity, withdrawal of consent, or sponsor termination of the study.

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

Analysis denominator · Participants

GroupSource count
Lenvatinib 20 mg + Pembrolizumab 200 mg411
Treatment of Physician's Choice(TPC):Doxorubicin or Paclitaxel416

Reported measurements

Source class 1
Values in Percentage of Participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Lenvatinib 20 mg + Pembrolizumab 200 mg31.927.427.436.6Not reported
Treatment of Physician's Choice(TPC):Doxorubicin or Paclitaxel14.711.411.418.4Not reported

Source statistical analyses

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

  1. ci Lower Limit
    11.5
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    22.9
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    < 0.0001
    param Type
    Difference in percentage
    param Value
    17.2
    statistical Method
    Miettinen & Nurminen method
Complete source fields
analyses
  1. ci Lower Limit
    11.5
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    22.9
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    < 0.0001
    param Type
    Difference in percentage
    param Value
    17.2
    statistical Method
    Miettinen & Nurminen method
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        27.4
        spread
        27.4
        upper Limit
        36.6
        value
        31.9
      2. group Id
        OG001
        lower Limit
        11.4
        spread
        11.4
        upper Limit
        18.4
        value
        14.7
denoms
  1. counts
    1. group Id
      OG000
      value
      411
    2. group Id
      OG001
      value
      416
    units
    Participants
description
ORR was defined as the percentage of participants who had best overall response of either complete response (CR) or partial response (PR) as determined by BICR per RECIST 1.1. CR was defined as the disappearance of all target and non-target lesions (non-lymph nodes). All pathological lymph nodes (whether target or non-target) must have a reduction in their short axis to less than (\<) 10mm. PR was defined as at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants with Endometrial cancer (EC) received lenvatinib 20 milligrams (mg) orally, once daily, plus pembrolizumab 200 mg intravenously, every 3 weeks in each 21-day cycle. Participants continued to receive treatment until disease progression, development of unacceptable toxicity, withdrawal of consent, completion of 35 treatments (approximately 2 years) with pembrolizumab, or sponsor termination of the study
    id
    OG000
    title
    Lenvatinib 20 mg + Pembrolizumab 200 mg
  2. description
    Participants with EC received either doxorubicin 60 milligrams per square meter (mg/m\^2) intravenously, every 3 weeks, in each 21-day treatment cycle, or paclitaxel 80 mg/m\^2 intravenously, weekly (3 weeks on/1 week off), in each 28-day treatment cycle. Participants continued to receive treatment until a lifetime cumulative dose of 500 mg/m\^2 doxorubicin, a maximum dose of paclitaxel per standard of care, or until disease progression, development of unacceptable toxicity, withdrawal of consent, or sponsor termination of the study.
    id
    OG001
    title
    Treatment of Physician's Choice(TPC):Doxorubicin or Paclitaxel
param Type
NUMBER
population Description
Analysis population consisted of ITT population which included all randomized participants.
reporting Status
POSTED
time Frame
Up to approximately 80 months
title
ORR in All-comer Participants
type
SECONDARY
unit Of Measure
Percentage of Participants

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