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NCT02220894 · OUTCOME

Objective Response Rate (ORR) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR) in Participants With a Tumor Proportion Score (TPS) of ≥50%

Study of Pembrolizumab (MK-3475) Versus Platinum-Based Chemotherapy for Participants With Programmed Cell Death-Ligand 1 (PD-L1)-Positive Advanced or Metastatic Non-Small Cell Lung Cancer (MK-3475-042/KEYNOTE-042) · Source last updated 2026-06-25

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 44 months

What was measured

ORR was determined for participants with a TPS of ≥50%. ORR was determined per RECIST 1.1 and was defined as the percentage of participants in the analysis population who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters) per RECIST 1.1. The efficacy hypothesis was analyzed using a sequential testing strategy that involved testing a hypothesis only if the superiority of pembrolizumab over chemotherapy was established for all the preceding hypotheses. The order of testing was ORR in participants with TPS≥50%, then with TPS≥20%, and finally with TPS≥1%. The percentage of participants who had a TPS ≥50% and who experienced a CR or PR is presented.

Analysis population: The analysis population included all participants who were alive at the time of randomization and had a TPS of ≥50%.

Groups in this outcome

Pembrolizumab

Participants received pembrolizumab 200 mg by IV infusion on Day 1 Q3W for a maximum of 35 cycles (21-day cycles)

Chemotherapy (SOC Treatment)

Participants received carboplatin at target dose AUC 5 (maximum dose 750 mg) or AUC 6 (maximum dose 900 mg) + paclitaxel 200 mg/m\^2 by IV infusion on Day 1 Q3W for a maximum of 6 cycles (21-day cycles) OR carboplatin target dose AUC 5 (maximum dose 750 mg) or AUC 6 (maximum dose 900 mg) + pemetrexed 500 mg/m\^2 by IV infusion on Day 1 Q3W for a maximum of 6 cycles (21-day cycles). Participants with non-squamous histologies received optional additional maintenance treatment with pemetrexed 500 mg/m\^2 by IV infusion on Day 1 Q3W

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

Analysis denominator · Participants

GroupSource count
Pembrolizumab299
Chemotherapy (SOC Treatment)300

Reported measurements

Source class 1
Values in Percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Pembrolizumab39.1Not reported33.644.9Not reported
Chemotherapy (SOC Treatment)32.0Not reported26.837.6Not reported

Source statistical analyses

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

  1. ci Lower Limit
    -0.6
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    14.6
    estimate Comment
    DP for pembrolizumab vs. chemotherapy based on Miettinen \& Nurminen method stratified by geographic region (East Asia vs. non-East Asia), ECOG PS (0 vs. 1) and histology (squamous vs. nonsquamous).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0353
    p Value Comment
    One-sided p-value for testing. H0: difference in percentages=0 vs. H1: difference in percentages \>0
    param Type
    Difference in Percentage (DP)
    param Value
    7.0
    statistical Method
    Stratified Miettinen and Nurminen
Complete source fields
analyses
  1. ci Lower Limit
    -0.6
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    14.6
    estimate Comment
    DP for pembrolizumab vs. chemotherapy based on Miettinen \& Nurminen method stratified by geographic region (East Asia vs. non-East Asia), ECOG PS (0 vs. 1) and histology (squamous vs. nonsquamous).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0353
    p Value Comment
    One-sided p-value for testing. H0: difference in percentages=0 vs. H1: difference in percentages \>0
    param Type
    Difference in Percentage (DP)
    param Value
    7.0
    statistical Method
    Stratified Miettinen and Nurminen
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        33.6
        upper Limit
        44.9
        value
        39.1
      2. group Id
        OG001
        lower Limit
        26.8
        upper Limit
        37.6
        value
        32.0
denoms
  1. counts
    1. group Id
      OG000
      value
      299
    2. group Id
      OG001
      value
      300
    units
    Participants
description
ORR was determined for participants with a TPS of ≥50%. ORR was determined per RECIST 1.1 and was defined as the percentage of participants in the analysis population who had a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters) per RECIST 1.1. The efficacy hypothesis was analyzed using a sequential testing strategy that involved testing a hypothesis only if the superiority of pembrolizumab over chemotherapy was established for all the preceding hypotheses. The order of testing was ORR in participants with TPS≥50%, then with TPS≥20%, and finally with TPS≥1%. The percentage of participants who had a TPS ≥50% and who experienced a CR or PR is presented.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received pembrolizumab 200 mg by IV infusion on Day 1 Q3W for a maximum of 35 cycles (21-day cycles)
    id
    OG000
    title
    Pembrolizumab
  2. description
    Participants received carboplatin at target dose AUC 5 (maximum dose 750 mg) or AUC 6 (maximum dose 900 mg) + paclitaxel 200 mg/m\^2 by IV infusion on Day 1 Q3W for a maximum of 6 cycles (21-day cycles) OR carboplatin target dose AUC 5 (maximum dose 750 mg) or AUC 6 (maximum dose 900 mg) + pemetrexed 500 mg/m\^2 by IV infusion on Day 1 Q3W for a maximum of 6 cycles (21-day cycles). Participants with non-squamous histologies received optional additional maintenance treatment with pemetrexed 500 mg/m\^2 by IV infusion on Day 1 Q3W
    id
    OG001
    title
    Chemotherapy (SOC Treatment)
param Type
NUMBER
population Description
The analysis population included all participants who were alive at the time of randomization and had a TPS of ≥50%.
reporting Status
POSTED
time Frame
Up to approximately 44 months
title
Objective Response Rate (ORR) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR) in Participants With a Tumor Proportion Score (TPS) of ≥50%
type
SECONDARY
unit Of Measure
Percentage of participants

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Preserved source evidence · Not medical advice