Skip to content
← Full study record

NCT04035486 · OUTCOME

Overall Survival (OS) (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 (maximum follow up of 34.1 months)

What was measured

Overall survival is defined as the time from the date of randomization until death due to any cause. Subjects not known to have died at the time of analysis are censored at the last recorded date on which the subject was known to be alive. Median overall Survival 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 + ChemoNANot reported31.9NAMedian and Upper Limit for the 95% confidence interval were not estimated due to the small number of participants with events at data cut off.
Randomized: AZD9291NANot reportedNANAMedian, Lower Limit and Upper Limit for the 95% confidence interval were not estimated due to the small number of participants with events at data cut off.

Source statistical analyses

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

  1. ci Lower Limit
    0.65
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.24
    estimate Comment
    A hazard ratio of 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
    other Analysis Description
    An adjusted CI of (0.54, 1.51) was computed at the 2-sided 99.84% level, considering a 2-sided significance level of 0.00158 for the overall survival interim analysis, based on the O'Brien and Fleming spending function, assuming 334 deaths for the final overall survival analysis.
    p Value
    0.5238
    param Type
    Hazard Ratio (HR)
    param Value
    0.90
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.65
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.24
    estimate Comment
    A hazard ratio of 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
    other Analysis Description
    An adjusted CI of (0.54, 1.51) was computed at the 2-sided 99.84% level, considering a 2-sided significance level of 0.00158 for the overall survival interim analysis, based on the O'Brien and Fleming spending function, assuming 334 deaths for the final overall survival analysis.
    p Value
    0.5238
    param Type
    Hazard Ratio (HR)
    param Value
    0.90
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. comment
        Median and Upper Limit for the 95% confidence interval were not estimated due to the small number of participants with events at data cut off.
        group Id
        OG000
        lower Limit
        31.9
        upper Limit
        NA
        value
        NA
      2. comment
        Median, Lower Limit and Upper Limit for the 95% confidence interval were not estimated due to the small number of participants with events at data cut off.
        group Id
        OG001
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
denoms
  1. counts
    1. group Id
      OG000
      value
      279
    2. group Id
      OG001
      value
      278
    units
    Participants
description
Overall survival is defined as the time from the date of randomization until death due to any cause. Subjects not known to have died at the time of analysis are censored at the last recorded date on which the subject was known to be alive. Median overall Survival 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 (maximum follow up of 34.1 months)
title
Overall Survival (OS) (Randomized Component)
type
SECONDARY
unit Of Measure
Months

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice