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NCT02165397 · OUTCOME

Overall Survival (OS) - Kaplan Meier Landmark Estimates at Month 54

Ibrutinib With Rituximab in Adults With Waldenström's Macroglobulinemia · Source last updated 2021-03-03

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
95% Confidence Interval
Time frame
Month 54 (median time on study: 49.7 months [Ibr+R and Pbo+R] and 57.9 months [Open-Label Ibr])

What was measured

OS, defined as the time from the date of randomization to the date of death from any cause. All deaths observed as the time of the analysis were considered as events. For participants who were not known to have died at the time of the analysis, OS data were censored at the date last known alive. As the median OS was not reached in any treatment arm at the time of the analysis, Kaplan Meier point estimates of the OS rate (that is, the estimated percentage of participants still surviving at Month 54) are presented.

Analysis population: Intent to Treat population: all randomized/enrolled participants

Groups in this outcome

Ibrutinib + Rituximab

Ibrutinib: 420 mg (3 capsules) orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Rituximab: 375 mg/m\^2 IV per package insert weekly for four consecutive weeks (Day 1 of Weeks 1-4), followed by a second four-weekly rituximab course after a three-month interval (Weeks 17-20) for a total of 8 infusions of rituximab.

Placebo + Rituximab

Placebo: 3 capsules of placebo orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Rituximab: 375 mg/m\^2 IV per package insert weekly for four consecutive weeks (Day 1 of Weeks 1-4), followed by a second four-weekly rituximab course after a three-month interval (Weeks 17-20) for a total of 8 infusions of rituximab.

Open-Label Substudy: Ibrutinib

Ibrutinib: 420 mg (3 capsules) orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Participants (rituximab refractory) were treated in an open-label substudy independently of the 2 randomized main treatment arms.

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

Analysis denominator · Participants

GroupSource count
Ibrutinib + Rituximab75
Placebo + Rituximab75
Open-Label Substudy: Ibrutinib31

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Ibrutinib + Rituximab86.4Not reported73.793.3Not reported
Placebo + Rituximab84.2Not reported71.391.6Not reported
Open-Label Substudy: Ibrutinib73.4Not reported53.785.7Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.328
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.99
    estimate Comment
    Hazard ratio is estimated using unstratified Cox regression model with treatment as the only covariate.
    group Description
    Data cutoff 18 December 2019
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.643
    p Value Comment
    P-value is from unstratified log rank test.
    param Type
    Hazard Ratio (HR)
    param Value
    0.808
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.328
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.99
    estimate Comment
    Hazard ratio is estimated using unstratified Cox regression model with treatment as the only covariate.
    group Description
    Data cutoff 18 December 2019
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.643
    p Value Comment
    P-value is from unstratified log rank test.
    param Type
    Hazard Ratio (HR)
    param Value
    0.808
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        73.7
        upper Limit
        93.3
        value
        86.4
      2. group Id
        OG001
        lower Limit
        71.3
        upper Limit
        91.6
        value
        84.2
      3. group Id
        OG002
        lower Limit
        53.7
        upper Limit
        85.7
        value
        73.4
denoms
  1. counts
    1. group Id
      OG000
      value
      75
    2. group Id
      OG001
      value
      75
    3. group Id
      OG002
      value
      31
    units
    Participants
description
OS, defined as the time from the date of randomization to the date of death from any cause. All deaths observed as the time of the analysis were considered as events. For participants who were not known to have died at the time of the analysis, OS data were censored at the date last known alive. As the median OS was not reached in any treatment arm at the time of the analysis, Kaplan Meier point estimates of the OS rate (that is, the estimated percentage of participants still surviving at Month 54) are presented.
dispersion Type
95% Confidence Interval
groups
  1. description
    Ibrutinib: 420 mg (3 capsules) orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Rituximab: 375 mg/m\^2 IV per package insert weekly for four consecutive weeks (Day 1 of Weeks 1-4), followed by a second four-weekly rituximab course after a three-month interval (Weeks 17-20) for a total of 8 infusions of rituximab.
    id
    OG000
    title
    Ibrutinib + Rituximab
  2. description
    Placebo: 3 capsules of placebo orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Rituximab: 375 mg/m\^2 IV per package insert weekly for four consecutive weeks (Day 1 of Weeks 1-4), followed by a second four-weekly rituximab course after a three-month interval (Weeks 17-20) for a total of 8 infusions of rituximab.
    id
    OG001
    title
    Placebo + Rituximab
  3. description
    Ibrutinib: 420 mg (3 capsules) orally administered daily beginning from Day 1 in Week 1 until progression, discontinuation due to toxicity or other reasons to discontinue treatment. Participants (rituximab refractory) were treated in an open-label substudy independently of the 2 randomized main treatment arms.
    id
    OG002
    title
    Open-Label Substudy: Ibrutinib
param Type
NUMBER
population Description
Intent to Treat population: all randomized/enrolled participants
reporting Status
POSTED
time Frame
Month 54 (median time on study: 49.7 months [Ibr+R and Pbo+R] and 57.9 months [Open-Label Ibr])
title
Overall Survival (OS) - Kaplan Meier Landmark Estimates at Month 54
type
SECONDARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice