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NCT04035486 · OUTCOME

Time to First Subsequent Therapy (TFST) or Death (Randomized Component)

A Study of Osimertinib With or Without Chemotherapy as 1st Line Treatment in Patients With Mutated Epidermal Growth Factor Receptor Non-Small Cell Lung Cancer (FLAURA2) · Source last updated 2026-09-03

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
Up to approximately 33 months after the first patient is randomized.

What was measured

Time to first subsequent therapy (TFST) or death is defined as the time from the date of randomization to the earlier of the date of anti- cancer therapy start date following IP discontinuation or death. Any patient not known to have had a subsequent therapy or not known to have died at the time of the analysis were censored at the last known time to have not received subsequent therapy; i.e., the last follow-up visit where this was confirmed. Median time to first subsequent therapy or death calculated using the Kaplan-Meier method.

Analysis population: Full Analysis Set, includes all randomized participants.

Groups in this outcome

Randomized: AZD9291 + Chemo

Osimertinib (AZD9291) 80 mg in combination with pemetrexed (500 mg/m2) plus either cisplatin (75 mg/m2) or carboplatin (AUC5) on Day 1 of 21-day cycles for 4 cycles, followed by Osimertinib (AZD9291) 80 mg QD with Pemetrexed maintenance (500 mg/m2) Q3W

Randomized: AZD9291

Osimertinib (AZD9291) 80mg QD.

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

Analysis denominator · Participants

GroupSource count
Randomized: AZD9291 + Chemo279
Randomized: AZD9291278

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Randomized: AZD9291 + Chemo30.7Not reported27.3NAUpper Limit for the 95% confidence interval (CI) could not be estimated because the follow-up time was too short to observe enough survival events for complete data estimation.
Randomized: AZD929125.4Not reported22.8NAUpper Limit for the 95% confidence interval (CI) could not be estimated because the follow-up time was too short to observe enough survival events for complete data estimation.

Source statistical analyses

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

  1. ci Lower Limit
    0.56
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.94
    estimate Comment
    A hazard ratio less than 1 favors the Osimertinib (AZD9291) + Chemo treatment arm.
    group Description
    The analysis was performed using a log rank test stratified by race (Chinese/Asian vs. Non-Chinese/Asian vs. Non-Asian), WHO performance status (0 vs. 1), and method used for tissue testing (central vs. local).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0159
    param Type
    Hazard Ratio (HR)
    param Value
    0.73
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.56
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.94
    estimate Comment
    A hazard ratio less than 1 favors the Osimertinib (AZD9291) + Chemo treatment arm.
    group Description
    The analysis was performed using a log rank test stratified by race (Chinese/Asian vs. Non-Chinese/Asian vs. Non-Asian), WHO performance status (0 vs. 1), and method used for tissue testing (central vs. local).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0159
    param Type
    Hazard Ratio (HR)
    param Value
    0.73
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. comment
        Upper Limit for the 95% confidence interval (CI) could not be estimated because the follow-up time was too short to observe enough survival events for complete data estimation.
        group Id
        OG000
        lower Limit
        27.3
        upper Limit
        NA
        value
        30.7
      2. comment
        Upper Limit for the 95% confidence interval (CI) could not be estimated because the follow-up time was too short to observe enough survival events for complete data estimation.
        group Id
        OG001
        lower Limit
        22.8
        upper Limit
        NA
        value
        25.4
denoms
  1. counts
    1. group Id
      OG000
      value
      279
    2. group Id
      OG001
      value
      278
    units
    Participants
description
Time to first subsequent therapy (TFST) or death is defined as the time from the date of randomization to the earlier of the date of anti- cancer therapy start date following IP discontinuation or death. Any patient not known to have had a subsequent therapy or not known to have died at the time of the analysis were censored at the last known time to have not received subsequent therapy; i.e., the last follow-up visit where this was confirmed. Median time to first subsequent therapy or death calculated using the Kaplan-Meier method.
dispersion Type
95% Confidence Interval
groups
  1. description
    Osimertinib (AZD9291) 80 mg in combination with pemetrexed (500 mg/m2) plus either cisplatin (75 mg/m2) or carboplatin (AUC5) on Day 1 of 21-day cycles for 4 cycles, followed by Osimertinib (AZD9291) 80 mg QD with Pemetrexed maintenance (500 mg/m2) Q3W
    id
    OG000
    title
    Randomized: AZD9291 + Chemo
  2. description
    Osimertinib (AZD9291) 80mg QD.
    id
    OG001
    title
    Randomized: AZD9291
param Type
MEDIAN
population Description
Full Analysis Set, includes all randomized participants.
reporting Status
POSTED
time Frame
Up to approximately 33 months after the first patient is randomized.
title
Time to First Subsequent Therapy (TFST) or Death (Randomized Component)
type
SECONDARY
unit Of Measure
Months

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