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NCT03043872 · OUTCOME

PK of Tremelimumab; Peak and Trough Serum Concentrations 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
GEOMETRIC_MEAN
Unit
μg/mL
Interval / dispersion
Geometric Coefficient of Variation
Time frame
Samples were collected post-dose on Day 1 (Week 0), and pre-dose on Weeks 3 and 12. Assessed at the global cohort final analysis DCO (27 January 2020).

What was measured

To evaluate PK, blood samples were collected at pre-specified timepoints and peak and trough serum concentrations of tremelimumab were determined. Peak concentration on Week 0 is the post-infusion concentration of Week 0 (collected within 10 minutes of the end of infusion). Trough concentrations on Weeks 3 and 12 are the pre-infusion concentrations of Weeks 3 and 12, respectively.

Analysis population: The global PK analysis set included all patients randomized prior to the end of global recruitment who received at least 1 dose of IP, per the protocol for whom any post-dose PK data were available. PK for tremelimumab was performed for the D + T + EP group only.

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.

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 + EP257

Reported measurements

Week 0: peak concentration

Analysis denominator · Participants

GroupSource count
Global Cohort: D + T + EP236
Values in μg/mL · Interval/dispersion: Geometric Coefficient of Variation
GroupValueSpreadLowerUpperComment
Global Cohort: D + T + EP22.7752.15Not reportedNot reportedNot reported
Week 3: trough concentration

Analysis denominator · Participants

GroupSource count
Global Cohort: D + T + EP227
Values in μg/mL · Interval/dispersion: Geometric Coefficient of Variation
GroupValueSpreadLowerUpperComment
Global Cohort: D + T + EP4.24581.68Not reportedNot reportedNot reported
Week 12: trough concentration

Analysis denominator · Participants

GroupSource count
Global Cohort: D + T + EP148
Values in μg/mL · Interval/dispersion: Geometric Coefficient of Variation
GroupValueSpreadLowerUpperComment
Global Cohort: D + T + EP7.57659.25Not reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        spread
        52.15
        value
        22.77
    denoms
    1. counts
      1. group Id
        OG000
        value
        236
      units
      Participants
    title
    Week 0: peak concentration
  2. categories
    1. measurements
      1. group Id
        OG000
        spread
        81.68
        value
        4.245
    denoms
    1. counts
      1. group Id
        OG000
        value
        227
      units
      Participants
    title
    Week 3: trough concentration
  3. categories
    1. measurements
      1. group Id
        OG000
        spread
        59.25
        value
        7.576
    denoms
    1. counts
      1. group Id
        OG000
        value
        148
      units
      Participants
    title
    Week 12: trough concentration
denoms
  1. counts
    1. group Id
      OG000
      value
      257
    units
    Participants
description
To evaluate PK, blood samples were collected at pre-specified timepoints and peak and trough serum concentrations of tremelimumab were determined. Peak concentration on Week 0 is the post-infusion concentration of Week 0 (collected within 10 minutes of the end of infusion). Trough concentrations on Weeks 3 and 12 are the pre-infusion concentrations of Weeks 3 and 12, respectively.
dispersion Type
Geometric Coefficient of Variation
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
param Type
GEOMETRIC_MEAN
population Description
The global PK analysis set included all patients randomized prior to the end of global recruitment who received at least 1 dose of IP, per the protocol for whom any post-dose PK data were available. PK for tremelimumab was performed for the D + T + EP group only.
reporting Status
POSTED
time Frame
Samples were collected post-dose on Day 1 (Week 0), and pre-dose on Weeks 3 and 12. Assessed at the global cohort final analysis DCO (27 January 2020).
title
PK of Tremelimumab; Peak and Trough Serum Concentrations in the Global Cohort
type
SECONDARY
unit Of Measure
μg/mL

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