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NCT03734016 · OUTCOME

Overall Response Rate (ORR) Assessed by the Investigator

A Study of Zanubrutinib (BGB-3111) Versus Ibrutinib in Participants With Relapsed/Refractory Chronic Lymphocytic Leukemia · Source last updated 2025-03-30

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
From randomization to the final efficacy analysis cutoff date of 08 August 2022, median time on follow-up was 29.6 months (maximum of 45.2 months).

What was measured

ORR is defined as the percentage of participants with a complete response (CR) / complete response with incomplete bone marrow recovery (CRi), nodular partial response (nPR) or partial response (PR) per investigator assessment. Disease response was assessed in accordance with the 2008 criteria of the International Workshop on CLL (IWCLL), with modification for treatment-related lymphocytosis in participants with CLL and in accordance with the Lugano classification in participants with SLL.

Analysis population: Intent To Treat (ITT) Analysis Set

Groups in this outcome

Zanubrutinib

Participants received 160 mg zanubrutinib orally twice daily until disease progression, intolerable toxicity, initiation of alternative anticancer therapy, investigator/Sponsor decision, need for prohibited medication, study withdrawal, or pregnancy.

Ibrutinib

Participants received ibrutinib 420 mg orally once daily until disease progression, intolerable toxicity, initiation of alternative anticancer therapy, investigator/Sponsor decision, need for prohibited medication, study withdrawal, or pregnancy.

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

Analysis denominator · Participants

GroupSource count
Zanubrutinib327
Ibrutinib325

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Zanubrutinib83.5Not reported79.087.3Not reported
Ibrutinib74.2Not reported69.078.8Not reported

Source statistical analyses

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

  1. ci Lower Limit
    1.04
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.22
    estimate Comment
    Response ratio is the estimated ratio of the overall response rate of the zanubrutinib arm divided by that of the ibrutinib arm.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    Non-inferiority testing for ORR was performed using a stratified Wald test based on the stratified Mantel-Haenszel response ratio estimate against the non-inferiority margin of 0.8558 on the log scale.
    non Inferiority Type
    NON_INFERIORITY
    p Value
    <0.0001
    param Type
    Response ratio
    param Value
    1.12
    statistical Comment
    Stratified by the randomization stratification factors (age, geographic region, refractory status, and 17p deletion and TP53 mutation status)
    statistical Method
    Stratified Wald test
  2. group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0035
    p Value Comment
    Superiority testing was performed using a 2-sided stratified Cochran-Mantel-Haenszel test.
    statistical Comment
    Stratified by the randomization stratification factors (age, geographic region, refractory status, and 17p deletion and TP53 mutation status)
    statistical Method
    Cochran-Mantel-Haenszel
Complete source fields
analyses
  1. ci Lower Limit
    1.04
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.22
    estimate Comment
    Response ratio is the estimated ratio of the overall response rate of the zanubrutinib arm divided by that of the ibrutinib arm.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    Non-inferiority testing for ORR was performed using a stratified Wald test based on the stratified Mantel-Haenszel response ratio estimate against the non-inferiority margin of 0.8558 on the log scale.
    non Inferiority Type
    NON_INFERIORITY
    p Value
    <0.0001
    param Type
    Response ratio
    param Value
    1.12
    statistical Comment
    Stratified by the randomization stratification factors (age, geographic region, refractory status, and 17p deletion and TP53 mutation status)
    statistical Method
    Stratified Wald test
  2. group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0035
    p Value Comment
    Superiority testing was performed using a 2-sided stratified Cochran-Mantel-Haenszel test.
    statistical Comment
    Stratified by the randomization stratification factors (age, geographic region, refractory status, and 17p deletion and TP53 mutation status)
    statistical Method
    Cochran-Mantel-Haenszel
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        79.0
        upper Limit
        87.3
        value
        83.5
      2. group Id
        OG001
        lower Limit
        69.0
        upper Limit
        78.8
        value
        74.2
denoms
  1. counts
    1. group Id
      OG000
      value
      327
    2. group Id
      OG001
      value
      325
    units
    Participants
description
ORR is defined as the percentage of participants with a complete response (CR) / complete response with incomplete bone marrow recovery (CRi), nodular partial response (nPR) or partial response (PR) per investigator assessment. Disease response was assessed in accordance with the 2008 criteria of the International Workshop on CLL (IWCLL), with modification for treatment-related lymphocytosis in participants with CLL and in accordance with the Lugano classification in participants with SLL.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received 160 mg zanubrutinib orally twice daily until disease progression, intolerable toxicity, initiation of alternative anticancer therapy, investigator/Sponsor decision, need for prohibited medication, study withdrawal, or pregnancy.
    id
    OG000
    title
    Zanubrutinib
  2. description
    Participants received ibrutinib 420 mg orally once daily until disease progression, intolerable toxicity, initiation of alternative anticancer therapy, investigator/Sponsor decision, need for prohibited medication, study withdrawal, or pregnancy.
    id
    OG001
    title
    Ibrutinib
param Type
NUMBER
population Description
Intent To Treat (ITT) Analysis Set
reporting Status
POSTED
time Frame
From randomization to the final efficacy analysis cutoff date of 08 August 2022, median time on follow-up was 29.6 months (maximum of 45.2 months).
title
Overall Response Rate (ORR) Assessed by the Investigator
type
PRIMARY
unit Of Measure
percentage of participants

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