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NCT03043872 · OUTCOME

Objective Response Rate (ORR) in the Global Cohort

Durvalumab ± Tremelimumab in Combination With Platinum Based Chemotherapy in Untreated Extensive-Stage Small Cell Lung Cancer (CASPIAN) · Source last updated 2026-07-16

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

Measure
NUMBER
Unit
percentage of patients
Interval / dispersion
Not reported
Time frame
Tumour scans performed at baseline, Week 6, Week 12 then every 8 weeks relative to the date of randomization until RECIST 1.1-defined progression. Assessed until global cohort final analysis DCO (maximum of approximately 33 months).

What was measured

ORR (per RECIST 1.1 using Investigator assessments) was defined as the percentage of patients with at least 1 visit response of Complete Response (CR) or Partial Response (PR). CR was defined as disappearance of all TLs since baseline (any pathological lymph nodes selected as TLs must have a reduction in short axis diameter to \<10 mm) or disappearance of all NTLs since baseline (all lymph nodes must be non-pathological in size \[\<10 mm short axis\]). PR was defined as at least a 30% decrease in the sum of diameters of TLs (taking as reference the baseline sum of diameters).

Analysis population: The global FAS included all patients randomized prior to the end of global recruitment. The denominator was a subset of the FAS population who had measurable disease at baseline.

Groups in this outcome

Global Cohort: D + T + EP

During Chemotherapy: Patients received durvalumab (D) 1500 mg in combination with tremelimumab (T) 75 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Post-Chemotherapy: Patients then continued to receive durvalumab 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 IV infusion post-chemotherapy (in combination with durvalumab) at Week 16 if they completed all 4 doses of durvalumab + tremelimumab during chemotherapy.

Global Cohort: D + EP

During Chemotherapy: Patients received durvalumab (D) 1500 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Post-Chemotherapy: Patients then continued to receive durvalumab 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met.

Global Cohort: EP

For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). An additional 2 doses of EP (at Weeks 12 and 15) could be given at the investigators' discretion if clinically indicated.

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

Analysis denominator · Participants

GroupSource count
Global Cohort: D + T + EP267
Global Cohort: D + EP268
Global Cohort: EP269

Reported measurements

Source class 1
Values in percentage of patients · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Global Cohort: D + T + EP74.2Not reportedNot reportedNot reportedNot reported
Global Cohort: D + EP79.5Not reportedNot reportedNot reportedNot reported
Global Cohort: EP70.6Not reportedNot reportedNot reportedNot reported

Source statistical analyses

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

  1. ci Lower Limit
    1.086
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    2.401
    group Description
    D + EP vs EP. An odds ratio \>1 favors D + EP.
    group Ids
    1. OG001
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0177
    p Value Comment
    Analysis was performed using a logistic regression model, adjusting for planned platinum therapy in Cycle 1 (carboplatin or cisplatin). P-value is based on twice the change in log-likelihood resulting from addition of a treatment factor to the model.
    param Type
    Odds Ratio (OR)
    param Value
    1.61
    statistical Method
    Regression, Logistic
  2. ci Lower Limit
    0.817
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.746
    group Description
    D + T + EP vs EP. An odds ratio \>1 favors D + T + EP.
    group Ids
    1. OG000
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.3611
    p Value Comment
    Analysis was performed using a logistic regression model, adjusting for planned platinum therapy in Cycle 1 (carboplatin or cisplatin). P-value is based on twice the change in log-likelihood resulting from addition of a treatment factor to the model.
    param Type
    Odds Ratio (OR)
    param Value
    1.19
    statistical Method
    Regression, Logistic
Complete source fields
analyses
  1. ci Lower Limit
    1.086
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    2.401
    group Description
    D + EP vs EP. An odds ratio \>1 favors D + EP.
    group Ids
    1. OG001
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0177
    p Value Comment
    Analysis was performed using a logistic regression model, adjusting for planned platinum therapy in Cycle 1 (carboplatin or cisplatin). P-value is based on twice the change in log-likelihood resulting from addition of a treatment factor to the model.
    param Type
    Odds Ratio (OR)
    param Value
    1.61
    statistical Method
    Regression, Logistic
  2. ci Lower Limit
    0.817
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.746
    group Description
    D + T + EP vs EP. An odds ratio \>1 favors D + T + EP.
    group Ids
    1. OG000
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.3611
    p Value Comment
    Analysis was performed using a logistic regression model, adjusting for planned platinum therapy in Cycle 1 (carboplatin or cisplatin). P-value is based on twice the change in log-likelihood resulting from addition of a treatment factor to the model.
    param Type
    Odds Ratio (OR)
    param Value
    1.19
    statistical Method
    Regression, Logistic
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        74.2
      2. group Id
        OG001
        value
        79.5
      3. group Id
        OG002
        value
        70.6
denoms
  1. counts
    1. group Id
      OG000
      value
      267
    2. group Id
      OG001
      value
      268
    3. group Id
      OG002
      value
      269
    units
    Participants
description
ORR (per RECIST 1.1 using Investigator assessments) was defined as the percentage of patients with at least 1 visit response of Complete Response (CR) or Partial Response (PR). CR was defined as disappearance of all TLs since baseline (any pathological lymph nodes selected as TLs must have a reduction in short axis diameter to \<10 mm) or disappearance of all NTLs since baseline (all lymph nodes must be non-pathological in size \[\<10 mm short axis\]). PR was defined as at least a 30% decrease in the sum of diameters of TLs (taking as reference the baseline sum of diameters).
groups
  1. description
    During Chemotherapy: Patients received durvalumab (D) 1500 mg in combination with tremelimumab (T) 75 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Post-Chemotherapy: Patients then continued to receive durvalumab 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 IV infusion post-chemotherapy (in combination with durvalumab) at Week 16 if they completed all 4 doses of durvalumab + tremelimumab during chemotherapy.
    id
    OG000
    title
    Global Cohort: D + T + EP
  2. description
    During Chemotherapy: Patients received durvalumab (D) 1500 mg IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). Post-Chemotherapy: Patients then continued to receive durvalumab 1500 mg IV infusion Q4W from Week 12 until PD, unless there was unacceptable toxicity, withdrawal of consent, or another discontinuation criterion was met.
    id
    OG001
    title
    Global Cohort: D + EP
  3. description
    For chemotherapy (EP), patients received etoposide (80-100 mg/m\^2) with either carboplatin (area under the curve 5-6) or cisplatin (75-80 mg/m\^2) IV infusion Q3W for 4 doses/cycles (Weeks 0, 3, 6 and 9). An additional 2 doses of EP (at Weeks 12 and 15) could be given at the investigators' discretion if clinically indicated.
    id
    OG002
    title
    Global Cohort: EP
param Type
NUMBER
population Description
The global FAS included all patients randomized prior to the end of global recruitment. The denominator was a subset of the FAS population who had measurable disease at baseline.
reporting Status
POSTED
time Frame
Tumour scans performed at baseline, Week 6, Week 12 then every 8 weeks relative to the date of randomization until RECIST 1.1-defined progression. Assessed until global cohort final analysis DCO (maximum of approximately 33 months).
title
Objective Response Rate (ORR) in the Global Cohort
type
SECONDARY
unit Of Measure
percentage of patients

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Preserved source evidence · Not medical advice