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NCT02421939 · OUTCOME

Duration of Overall Survival (OS)

A Study of ASP2215 Versus Salvage Chemotherapy in Patients With Relapsed or Refractory Acute Myeloid Leukemia (AML) With FMS-like Tyrosine Kinase (FLT3) Mutation · Source last updated 2025-12-04

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
From randomization to until the date of death from any cause (median time of follow-up for OS was 17.8 months)

What was measured

Overall survival was defined as the time from the date of randomization until the date of death from any cause (death date - randomization date + 1). For a participant who was not known to have died by the end of study follow-up, OS was censored at the date of last contact (date of last contact - randomized date + 1). The date of last contact was the latest date that the participant was known to be alive. The last contact date was derived for participants alive at the analysis cutoff date. Survival rate and 95% CI were estimated using the Kaplan-Meier method and the Greenwood formula.

Analysis population: The analysis population was the Intention to Treatment (ITT) which consisted of all randomized participants.

Groups in this outcome

Gilteritinib

Participants received 120 mg dose (3 tablets of 40 mg) orally once a day in continuous 28-day cycles, at least 2 hours after or 1 hour before food. Gilteritinib treatment continued until participants met one of the treatment discontinuation criteria. After the end of treatment period, participants were allowed to enter long-term follow up period for up to 3 years for collection of subsequent AML treatment, EuroQol Group-5 Dimension-5 Level Instrument (EQ-5D-5L), remission status and survival (cause of death and date of death). Participants continuing to derive clinical benefit from gilteritinib as assessed by the investigator were allowed to continue the study treatment until a discontinuation criterion was met or if they had completed more than 3 years of treatment.

Salvage Chemotherapy

Participants received chemotherapy in 28-day cycles. Participants on Low-Dose Cytarabine (LoDAC) received 20 mg of cytarabine twice daily by subcutaneous (SC) or intravenous (IV) injection for 10 days. Participants on azacitidine received 75 mg/m\^2 daily by SC or IV injection for 7 days. Participants on LoDAC or azacitidine treatment continued until they met discontinuation criteria. Participants on mitoxantrone, etoposide and intermediate-dose cytarabine (MEC) chemotherapy received mitoxantrone 8 mg/m\^2 daily by IV for 5 days, etoposide 100 mg/m\^2 daily by IV for 5 days and cytarabine 1000 mg/m\^2 daily by IV for 5 days (days 1-5). Participants on fludarabine, cytarabine and granulocyte colony-stimulating factor with idarubicin (FLAG-IDA) chemotherapy received granulocyte-colony stimulating factor (G-CSF) 300 μg/m\^2 daily by SC/IV for 5 days (days 1-5), fludarabine 30 mg/m\^2 daily by IV for 5 days (days 2-6), cytarabine 2000 mg/m\^2 daily by IV for 5 days (days 2-6) and idarubicin 10 mg/m\^2 daily by IV for 3 days (days 2-4). Participants receiving MEC or FLAG-IDA received 1 cycle of therapy and were assessed for response on or after day 15. After the end of treatment period, participants were allowed to enter the long-term follow-up period of up to 3 years for collection of subsequent AML treatment, EQ-5D-5L, remission status and survival (cause of death and date of death).

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

Analysis denominator · Participants

GroupSource count
Gilteritinib247
Salvage Chemotherapy124

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Gilteritinib9.3Not reported7.710.7Not reported
Salvage Chemotherapy5.6Not reported4.77.3Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.490
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.830
    estimate Comment
    Based on Cox proportional hazards model. Assuming proportional hazards, an HR of \< 1 indicates a reduction in the hazard rate in favor of the gilteritinib arm
    group Description
    Stratified analysis where tratification factors were response to first-line AML therapy and preselected salvage chemotherapy per IRT.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0004
    p Value Comment
    1-sided P-value
    param Type
    Hazard Ratio (HR)
    param Value
    0.637
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.490
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.830
    estimate Comment
    Based on Cox proportional hazards model. Assuming proportional hazards, an HR of \< 1 indicates a reduction in the hazard rate in favor of the gilteritinib arm
    group Description
    Stratified analysis where tratification factors were response to first-line AML therapy and preselected salvage chemotherapy per IRT.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0004
    p Value Comment
    1-sided P-value
    param Type
    Hazard Ratio (HR)
    param Value
    0.637
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        7.7
        upper Limit
        10.7
        value
        9.3
      2. group Id
        OG001
        lower Limit
        4.7
        upper Limit
        7.3
        value
        5.6
denoms
  1. counts
    1. group Id
      OG000
      value
      247
    2. group Id
      OG001
      value
      124
    units
    Participants
description
Overall survival was defined as the time from the date of randomization until the date of death from any cause (death date - randomization date + 1). For a participant who was not known to have died by the end of study follow-up, OS was censored at the date of last contact (date of last contact - randomized date + 1). The date of last contact was the latest date that the participant was known to be alive. The last contact date was derived for participants alive at the analysis cutoff date. Survival rate and 95% CI were estimated using the Kaplan-Meier method and the Greenwood formula.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received 120 mg dose (3 tablets of 40 mg) orally once a day in continuous 28-day cycles, at least 2 hours after or 1 hour before food. Gilteritinib treatment continued until participants met one of the treatment discontinuation criteria. After the end of treatment period, participants were allowed to enter long-term follow up period for up to 3 years for collection of subsequent AML treatment, EuroQol Group-5 Dimension-5 Level Instrument (EQ-5D-5L), remission status and survival (cause of death and date of death). Participants continuing to derive clinical benefit from gilteritinib as assessed by the investigator were allowed to continue the study treatment until a discontinuation criterion was met or if they had completed more than 3 years of treatment.
    id
    OG000
    title
    Gilteritinib
  2. description
    Participants received chemotherapy in 28-day cycles. Participants on Low-Dose Cytarabine (LoDAC) received 20 mg of cytarabine twice daily by subcutaneous (SC) or intravenous (IV) injection for 10 days. Participants on azacitidine received 75 mg/m\^2 daily by SC or IV injection for 7 days. Participants on LoDAC or azacitidine treatment continued until they met discontinuation criteria. Participants on mitoxantrone, etoposide and intermediate-dose cytarabine (MEC) chemotherapy received mitoxantrone 8 mg/m\^2 daily by IV for 5 days, etoposide 100 mg/m\^2 daily by IV for 5 days and cytarabine 1000 mg/m\^2 daily by IV for 5 days (days 1-5). Participants on fludarabine, cytarabine and granulocyte colony-stimulating factor with idarubicin (FLAG-IDA) chemotherapy received granulocyte-colony stimulating factor (G-CSF) 300 μg/m\^2 daily by SC/IV for 5 days (days 1-5), fludarabine 30 mg/m\^2 daily by IV for 5 days (days 2-6), cytarabine 2000 mg/m\^2 daily by IV for 5 days (days 2-6) and idarubicin 10 mg/m\^2 daily by IV for 3 days (days 2-4). Participants receiving MEC or FLAG-IDA received 1 cycle of therapy and were assessed for response on or after day 15. After the end of treatment period, participants were allowed to enter the long-term follow-up period of up to 3 years for collection of subsequent AML treatment, EQ-5D-5L, remission status and survival (cause of death and date of death).
    id
    OG001
    title
    Salvage Chemotherapy
param Type
MEDIAN
population Description
The analysis population was the Intention to Treatment (ITT) which consisted of all randomized participants.
reporting Status
POSTED
time Frame
From randomization to until the date of death from any cause (median time of follow-up for OS was 17.8 months)
title
Duration of Overall Survival (OS)
type
PRIMARY
unit Of Measure
Months

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