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NCT03837899 · OUTCOME

Dose-Expansion Phase: Percentage of Participants Who Developed Detectable ADAs

Durvalumab and Tremelimumab for Pediatric Malignancies · Source last updated 2026-07-07

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
Not reported
Time frame
Pre-infusion on Cycle 1 Day 1 and Cycle 3 Day 1 (durvalumab and tremelimumab) and random sample on Cycle 7 Day 1 for tremelimumab

What was measured

ADA prevalence was defined as the percentage of participants with positive ADA result at any time, baseline or post-baseline. Persistently positive was defined as having at least 2 post-baseline ADA positive measurements with at least 16 weeks (112 days) between the first and last positive measurements, or an ADA positive result at the last available assessment. The category includes participants meeting these criteria who are ADA positive at baseline. Transiently positive was defined as having at least 1 post-baseline ADA positive measurement and not fulfilling the conditions for persistently positive. The category includes participants meeting these criteria who are ADA positive at baseline.

Analysis population: The ADA analysis set included all participants who received at least 1 dose of study treatment per the CSP for whom baseline, and any post-dose data were available were included in the ADA analysis set.

Groups in this outcome

SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg

Participants with osteosarcoma and Ewing sarcoma, rhabdomyosarcoma, non rhabdomyosarcoma soft tissue sarcoma, and other sarcomas were included in this arm. Participants were administered durvalumab 30 mg/kg IV in combination with tremelimumab 1 mg/kg IV in Cycles 1-4 every 28 days. From Cycle 5 onwards participants were administered durvalumab 30 mg/kg every 28 days until clinical or confirmed disease progression or until any of other discontinuation criterion was met, whichever occurred first.

STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg

Participants with solid tumor other (STO) were included in this arm. Participants were administered durvalumab 30 mg/kg IV in combination with tremelimumab 1 mg/kg IV in Cycles 1-4 every 28 days. From Cycle 5 onwards participants were administered durvalumab 30 mg/kg every 28 days until clinical or confirmed disease progression or until any of other discontinuation criterion was met, whichever came occurred first.

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

Analysis denominator · Participants

GroupSource count
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg4
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg5

Reported measurements

Durvalumab, ADA positive at any visit
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg20Not reportedNot reportedNot reportedNot reported
Durvalumab, Persistently positive
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
Durvalumab, Transiently positive
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
Tremelimumab, ADA positive at any visit
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
Tremelimumab, Persistently positive
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
Tremelimumab, Transiently positive
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg0Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        20
    title
    Durvalumab, ADA positive at any visit
  2. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        0
    title
    Durvalumab, Persistently positive
  3. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        0
    title
    Durvalumab, Transiently positive
  4. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        0
    title
    Tremelimumab, ADA positive at any visit
  5. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        0
    title
    Tremelimumab, Persistently positive
  6. categories
    1. measurements
      1. group Id
        OG000
        value
        0
      2. group Id
        OG001
        value
        0
    title
    Tremelimumab, Transiently positive
denoms
  1. counts
    1. group Id
      OG000
      value
      4
    2. group Id
      OG001
      value
      5
    units
    Participants
description
ADA prevalence was defined as the percentage of participants with positive ADA result at any time, baseline or post-baseline. Persistently positive was defined as having at least 2 post-baseline ADA positive measurements with at least 16 weeks (112 days) between the first and last positive measurements, or an ADA positive result at the last available assessment. The category includes participants meeting these criteria who are ADA positive at baseline. Transiently positive was defined as having at least 1 post-baseline ADA positive measurement and not fulfilling the conditions for persistently positive. The category includes participants meeting these criteria who are ADA positive at baseline.
groups
  1. description
    Participants with osteosarcoma and Ewing sarcoma, rhabdomyosarcoma, non rhabdomyosarcoma soft tissue sarcoma, and other sarcomas were included in this arm. Participants were administered durvalumab 30 mg/kg IV in combination with tremelimumab 1 mg/kg IV in Cycles 1-4 every 28 days. From Cycle 5 onwards participants were administered durvalumab 30 mg/kg every 28 days until clinical or confirmed disease progression or until any of other discontinuation criterion was met, whichever occurred first.
    id
    OG000
    title
    SARCOMA: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg
  2. description
    Participants with solid tumor other (STO) were included in this arm. Participants were administered durvalumab 30 mg/kg IV in combination with tremelimumab 1 mg/kg IV in Cycles 1-4 every 28 days. From Cycle 5 onwards participants were administered durvalumab 30 mg/kg every 28 days until clinical or confirmed disease progression or until any of other discontinuation criterion was met, whichever came occurred first.
    id
    OG001
    title
    STO: Durvalumab 30 mg/kg + Tremelimumab 1mg/kg
param Type
NUMBER
population Description
The ADA analysis set included all participants who received at least 1 dose of study treatment per the CSP for whom baseline, and any post-dose data were available were included in the ADA analysis set.
reporting Status
POSTED
time Frame
Pre-infusion on Cycle 1 Day 1 and Cycle 3 Day 1 (durvalumab and tremelimumab) and random sample on Cycle 7 Day 1 for tremelimumab
title
Dose-Expansion Phase: Percentage of Participants Who Developed Detectable ADAs
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice