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NCT03164616 · OUTCOME

Best Objective Response (BoR)

Study of Durvalumab + Tremelimumab With Chemotherapy or Durvalumab With Chemotherapy or Chemotherapy Alone for Patients With Lung Cancer (POSEIDON). · Source last updated 2026-03-13

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

Measure
COUNT_OF_PARTICIPANTS
Unit
Participants
Interval / dispersion
Not reported
Time frame
Tumor scans performed at baseline, Week 6, Week 12 and then every 8 weeks relative to date of randomization until radiological progression. Assessed until global cohort DCO of 24 July 2019 (maximum of approximately 25 months).

What was measured

The BoR was calculated based on the overall visit responses from each RECIST 1.1 assessment. BOR was defined as the best response a patient had following randomization, but prior to starting any subsequent cancer therapy and up to and including RECIST 1.1 progression or the last evaluable assessment in the absence of RECIST 1.1 progression, as determined by BICR. Categorization of BoR was based on RECIST using the following 'response' categories: CR and PR and the following 'non-response' categories: stable disease (SD) ≥6 weeks, progression (ie, PD) and not evaluable (NE). Results are presented for number (%) of patients in each specified category.

Analysis population: Global cohort: The FAS included all randomized patients. The denominator was a subset of the FAS who had measurable disease at baseline.

Groups in this outcome

T + D + SoC

During chemotherapy (combination) stage: Patients received tremelimumab 75 mg + durvalumab 1500 mg combination therapy + SoC chemotherapy via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Patients then continued to receive durvalumab monotherapy 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Patients also received an additional dose of tremelimumab 75 mg (in combination with durvalumab) at Week 16 post-chemotherapy. Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q4W from Week 12 until PD, unless contraindicated per the Investigator.

D + SoC

During chemotherapy (combination) stage: Patients received durvalumab 1500 mg monotherapy + SoC chemotherapy via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Patients then continued to receive durvalumab monotherapy 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q4W from Week 12 until PD, unless contraindicated per the Investigator.

SoC Alone

During chemotherapy (combination) stage: Patients received SoC chemotherapy alone via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Patients could also receive SoC chemotherapy for an additional 2 cycles Q3W on Weeks 12 and 15 if clinically indicated and at the Investigator's discretion before the patient entered follow-up. The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q3W or Q4W (dependent on Investigator decision and local standards) from Week 12 until PD, unless contraindicated per the Investigator.

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

Analysis denominator · Participants

GroupSource count
T + D + SoC335
D + SoC330
SoC Alone332

Reported measurements

Source class 1

CR

Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T + D + SoC2Not reportedNot reportedNot reportedNot reported
D + SoC3Not reportedNot reportedNot reportedNot reported
SoC Alone0Not reportedNot reportedNot reportedNot reported

PR

Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T + D + SoC153Not reportedNot reportedNot reportedNot reported
D + SoC157Not reportedNot reportedNot reportedNot reported
SoC Alone111Not reportedNot reportedNot reportedNot reported

SD ≥6 weeks

Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T + D + SoC120Not reportedNot reportedNot reportedNot reported
D + SoC107Not reportedNot reportedNot reportedNot reported
SoC Alone150Not reportedNot reportedNot reportedNot reported

PD

Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T + D + SoC48Not reportedNot reportedNot reportedNot reported
D + SoC60Not reportedNot reportedNot reportedNot reported
SoC Alone61Not reportedNot reportedNot reportedNot reported

NE

Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
T + D + SoC12Not reportedNot reportedNot reportedNot reported
D + SoC3Not reportedNot reportedNot reportedNot reported
SoC Alone10Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        2
      2. group Id
        OG001
        value
        3
      3. group Id
        OG002
        value
        0
      title
      CR
    2. measurements
      1. group Id
        OG000
        value
        153
      2. group Id
        OG001
        value
        157
      3. group Id
        OG002
        value
        111
      title
      PR
    3. measurements
      1. group Id
        OG000
        value
        120
      2. group Id
        OG001
        value
        107
      3. group Id
        OG002
        value
        150
      title
      SD ≥6 weeks
    4. measurements
      1. group Id
        OG000
        value
        48
      2. group Id
        OG001
        value
        60
      3. group Id
        OG002
        value
        61
      title
      PD
    5. measurements
      1. group Id
        OG000
        value
        12
      2. group Id
        OG001
        value
        3
      3. group Id
        OG002
        value
        10
      title
      NE
denoms
  1. counts
    1. group Id
      OG000
      value
      335
    2. group Id
      OG001
      value
      330
    3. group Id
      OG002
      value
      332
    units
    Participants
description
The BoR was calculated based on the overall visit responses from each RECIST 1.1 assessment. BOR was defined as the best response a patient had following randomization, but prior to starting any subsequent cancer therapy and up to and including RECIST 1.1 progression or the last evaluable assessment in the absence of RECIST 1.1 progression, as determined by BICR. Categorization of BoR was based on RECIST using the following 'response' categories: CR and PR and the following 'non-response' categories: stable disease (SD) ≥6 weeks, progression (ie, PD) and not evaluable (NE). Results are presented for number (%) of patients in each specified category.
groups
  1. description
    During chemotherapy (combination) stage: Patients received tremelimumab 75 mg + durvalumab 1500 mg combination therapy + SoC chemotherapy via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Patients then continued to receive durvalumab monotherapy 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Patients also received an additional dose of tremelimumab 75 mg (in combination with durvalumab) at Week 16 post-chemotherapy. Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q4W from Week 12 until PD, unless contraindicated per the Investigator.
    id
    OG000
    title
    T + D + SoC
  2. description
    During chemotherapy (combination) stage: Patients received durvalumab 1500 mg monotherapy + SoC chemotherapy via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Patients then continued to receive durvalumab monotherapy 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met. Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q4W from Week 12 until PD, unless contraindicated per the Investigator.
    id
    OG001
    title
    D + SoC
  3. description
    During chemotherapy (combination) stage: Patients received SoC chemotherapy alone via IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Patients could also receive SoC chemotherapy for an additional 2 cycles Q3W on Weeks 12 and 15 if clinically indicated and at the Investigator's discretion before the patient entered follow-up. The SoC chemotherapy was the Investigator's choice of one of the following regimens: abraxane + carboplatin (squamous and non-squamous patients), pemetrexed + cisplatin or carboplatin (non-squamous patients only), or gemcitabine + cisplatin or carboplatin (squamous patients only). Post-chemotherapy (maintenance) stage: Non-squamous patients who received pemetrexed + carboplatin/cisplatin during chemotherapy stage could receive pemetrexed maintenance therapy, given Q3W or Q4W (dependent on Investigator decision and local standards) from Week 12 until PD, unless contraindicated per the Investigator.
    id
    OG002
    title
    SoC Alone
param Type
COUNT_OF_PARTICIPANTS
population Description
Global cohort: The FAS included all randomized patients. The denominator was a subset of the FAS who had measurable disease at baseline.
reporting Status
POSTED
time Frame
Tumor scans performed at baseline, Week 6, Week 12 and then every 8 weeks relative to date of randomization until radiological progression. Assessed until global cohort DCO of 24 July 2019 (maximum of approximately 25 months).
title
Best Objective Response (BoR)
type
SECONDARY
unit Of Measure
Participants

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Preserved source evidence · Not medical advice