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NCT03875235 · OUTCOME

Progression-free Survival (PFS)

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
MEDIAN
Unit
Months
Interval / dispersion
95% Confidence Interval
Time frame
Tumor assessments every 6 weeks after randomization for the first 24 weeks and then every 8 weeks thereafter until date of RECIST 1.1 defined radiological progressive disease or death. Assessed up to maximum of approximately 27 months.

What was measured

PFS based on investigator assessments according to RECIST version 1.1 was defined as time from date of randomization until date of objective disease progression or death (by any cause in the absence of progression), regardless of whether the patient withdrew from randomized therapy or received another anticancer therapy prior to progression. Progression (i.e., PD) was defined as at least a 20% increase in the sum of diameters of target lesions (TLs) and an absolute increase of ≥5mm, taking as reference the smallest sum of diameters since treatment started including the baseline sum of diameters, or a measurable increase in a non-target lesion, or the appearance of new lesions. Median PFS was calculated using the Kaplan-Meier technique.

Analysis population: Full analysis set

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 + Cisplatin341
Placebo + Gemcitabine + Cisplatin344

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Durvalumab + Gemcitabine + Cisplatin7.2Not reported6.77.4Not reported
Placebo + Gemcitabine + Cisplatin5.7Not reported5.66.7Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.63
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95.19
    ci Upper Limit
    0.89
    estimate Comment
    The HR and CI were estimated from a stratified Cox proportional hazard model adjusting for disease status and primary tumor location.
    group Description
    The 2-sided significance level for PFS at the second interim analysis was 4.81%.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    other Analysis Description
    95% CI 0.63 to 0.89
    p Value
    0.001
    p Value Comment
    The p-value is based on a stratified log-rank test adjusting for disease status (initially unresectable versus recurrent) and primary tumor location (IHCC versus EHCC versus GBC), and tested at 0.0481 significance level.
    param Type
    Hazard Ratio (HR)
    param Value
    0.75
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.63
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95.19
    ci Upper Limit
    0.89
    estimate Comment
    The HR and CI were estimated from a stratified Cox proportional hazard model adjusting for disease status and primary tumor location.
    group Description
    The 2-sided significance level for PFS at the second interim analysis was 4.81%.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    other Analysis Description
    95% CI 0.63 to 0.89
    p Value
    0.001
    p Value Comment
    The p-value is based on a stratified log-rank test adjusting for disease status (initially unresectable versus recurrent) and primary tumor location (IHCC versus EHCC versus GBC), and tested at 0.0481 significance level.
    param Type
    Hazard Ratio (HR)
    param Value
    0.75
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        6.7
        upper Limit
        7.4
        value
        7.2
      2. group Id
        OG001
        lower Limit
        5.6
        upper Limit
        6.7
        value
        5.7
denoms
  1. counts
    1. group Id
      OG000
      value
      341
    2. group Id
      OG001
      value
      344
    units
    Participants
description
PFS based on investigator assessments according to RECIST version 1.1 was defined as time from date of randomization until date of objective disease progression or death (by any cause in the absence of progression), regardless of whether the patient withdrew from randomized therapy or received another anticancer therapy prior to progression. Progression (i.e., PD) was defined as at least a 20% increase in the sum of diameters of target lesions (TLs) and an absolute increase of ≥5mm, taking as reference the smallest sum of diameters since treatment started including the baseline sum of diameters, or a measurable increase in a non-target lesion, or the appearance of new lesions. Median PFS was calculated using the Kaplan-Meier technique.
dispersion Type
95% Confidence Interval
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
MEDIAN
population Description
Full analysis set
reporting Status
POSTED
time Frame
Tumor assessments every 6 weeks after randomization for the first 24 weeks and then every 8 weeks thereafter until date of RECIST 1.1 defined radiological progressive disease or death. Assessed up to maximum of approximately 27 months.
title
Progression-free Survival (PFS)
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice