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NCT03409614 · OUTCOME

Part 2: Estimated Survival Probability

Combinations of Cemiplimab (Anti-PD-1 Antibody) and Platinum-based Doublet Chemotherapy in Patients With Lung Cancer · Source last updated 2026-05-18

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

Measure
NUMBER
Unit
Estimated percentage of participants
Interval / dispersion
95% Confidence Interval
Time frame
12 months, 18 months, 24 months

What was measured

OS rate at a landmark (12, 18, and 24 months) was defined as the K-M estimated probability of participants who survived due to any cause at the landmark after randomization.

Analysis population: Part 2 participants only

Groups in this outcome

Part 2: Cemiplimab + Chemotherapy

Participants received cemiplimab plus platinum-based doublet chemotherapy

Part 2: Placebo + Chemotherapy

Placebo matching cemiplimab plus platinum-based doublet chemotherapy

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

Analysis denominator · Participants

GroupSource count
Part 2: Cemiplimab + Chemotherapy312
Part 2: Placebo + Chemotherapy154

Reported measurements

12 months
Values in Estimated percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Part 2: Cemiplimab + Chemotherapy66.4Not reported60.871.5Not reported
Part 2: Placebo + Chemotherapy53.9Not reported45.461.6Not reported
18 months
Values in Estimated percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Part 2: Cemiplimab + Chemotherapy53.7Not reported47.859.2Not reported
Part 2: Placebo + Chemotherapy35.8Not reported28.043.7Not reported
24 months
Values in Estimated percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Part 2: Cemiplimab + Chemotherapy43.9Not reported38.249.5Not reported
Part 2: Placebo + Chemotherapy27.7Not reported20.535.3Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        60.8
        upper Limit
        71.5
        value
        66.4
      2. group Id
        OG001
        lower Limit
        45.4
        upper Limit
        61.6
        value
        53.9
    title
    12 months
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        47.8
        upper Limit
        59.2
        value
        53.7
      2. group Id
        OG001
        lower Limit
        28.0
        upper Limit
        43.7
        value
        35.8
    title
    18 months
  3. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        38.2
        upper Limit
        49.5
        value
        43.9
      2. group Id
        OG001
        lower Limit
        20.5
        upper Limit
        35.3
        value
        27.7
    title
    24 months
denoms
  1. counts
    1. group Id
      OG000
      value
      312
    2. group Id
      OG001
      value
      154
    units
    Participants
description
OS rate at a landmark (12, 18, and 24 months) was defined as the K-M estimated probability of participants who survived due to any cause at the landmark after randomization.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received cemiplimab plus platinum-based doublet chemotherapy
    id
    OG000
    title
    Part 2: Cemiplimab + Chemotherapy
  2. description
    Placebo matching cemiplimab plus platinum-based doublet chemotherapy
    id
    OG001
    title
    Part 2: Placebo + Chemotherapy
param Type
NUMBER
population Description
Part 2 participants only
reporting Status
POSTED
time Frame
12 months, 18 months, 24 months
title
Part 2: Estimated Survival Probability
type
SECONDARY
unit Of Measure
Estimated percentage of participants

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice