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NCT03875235 · OUTCOME

Duration of Response (DoR): Percentage Remaining in Response at 9 Months

Durvalumab or Placebo in Combination With Gemcitabine/Cisplatin in Patients With 1st Line Advanced Biliary Tract Cancer (TOPAZ-1) · Source last updated 2026-08-26

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
Tumor assessments (per RECIST 1.1) every 6 weeks for first 24 weeks relative to the date of randomization and then every 8 weeks thereafter. Calculated at 9 months using the Kaplan-Meier technique

What was measured

The DoR was defined as the time from the date of first documented OR (confirmed CR or confirmed PR) until date of documented progression (PD) based on investigator assessments by using RECIST version 1.1 or death in absence of disease progression (i.e. date of PFS event or censoring - date of first response + 1) . A confirmed CR was defined in above outcome measures. The PD was defined at least 20% increase in sum of diameters of target lesions (compared with nadir at 2 consecutive visits with an absolute increase of 5 mm), unequivocal progression of existing non-target lesions or new lesion. For participants who were alive and no documented PD at the time of data cutoff for analysis, DoR was censored at the last evaluable disease assessment date. Median DoR was calculated using Kaplan-Meier method.

Analysis population: Full analysis set - subjects with objective response and measurable disease at baseline

Groups in this outcome

Durvalumab + Gemcitabine + Cisplatin

Drug: Durvalumab IV infusion every 3 weeks with gemcitabine plus cisplatin up to 8 cycles followed by monotherapy every 4 weeks until disease progression or other discontinuation criteria.

Placebo + Gemcitabine + Cisplatin

Drug: Placebo IV infusion every 3 weeks with gemcitabine plus cisplatin up to 8 cycles followed by monotherapy every 4 weeks until disease progression or other discontinuation criteria.

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

Analysis denominator · Participants

GroupSource count
Durvalumab + Gemcitabine + Cisplatin91
Placebo + Gemcitabine + Cisplatin64

Reported measurements

Source class 1
Values in Percentage of Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Durvalumab + Gemcitabine + Cisplatin32.6Not reportedNot reportedNot reportedNot reported
Placebo + Gemcitabine + Cisplatin25.3Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        32.6
      2. group Id
        OG001
        value
        25.3
denoms
  1. counts
    1. group Id
      OG000
      value
      91
    2. group Id
      OG001
      value
      64
    units
    Participants
description
The DoR was defined as the time from the date of first documented OR (confirmed CR or confirmed PR) until date of documented progression (PD) based on investigator assessments by using RECIST version 1.1 or death in absence of disease progression (i.e. date of PFS event or censoring - date of first response + 1) . A confirmed CR was defined in above outcome measures. The PD was defined at least 20% increase in sum of diameters of target lesions (compared with nadir at 2 consecutive visits with an absolute increase of 5 mm), unequivocal progression of existing non-target lesions or new lesion. For participants who were alive and no documented PD at the time of data cutoff for analysis, DoR was censored at the last evaluable disease assessment date. Median DoR was calculated using Kaplan-Meier method.
groups
  1. description
    Drug: Durvalumab IV infusion every 3 weeks with gemcitabine plus cisplatin up to 8 cycles followed by monotherapy every 4 weeks until disease progression or other discontinuation criteria.
    id
    OG000
    title
    Durvalumab + Gemcitabine + Cisplatin
  2. description
    Drug: Placebo IV infusion every 3 weeks with gemcitabine plus cisplatin up to 8 cycles followed by monotherapy every 4 weeks until disease progression or other discontinuation criteria.
    id
    OG001
    title
    Placebo + Gemcitabine + Cisplatin
param Type
NUMBER
population Description
Full analysis set - subjects with objective response and measurable disease at baseline
reporting Status
POSTED
time Frame
Tumor assessments (per RECIST 1.1) every 6 weeks for first 24 weeks relative to the date of randomization and then every 8 weeks thereafter. Calculated at 9 months using the Kaplan-Meier technique
title
Duration of Response (DoR): Percentage Remaining in Response at 9 Months
type
SECONDARY
unit Of Measure
Percentage of Participants

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Preserved source evidence · Not medical advice