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NCT03462719 · OUTCOME

Duration of Response (DOR)

A Study of the Combination of Ibrutinib Plus Venetoclax Versus Chlorambucil Plus Obinutuzumab for the First-line Treatment of Participants With Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL) · Source last updated 2026-08-31

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 2 years 10 months

What was measured

DOR is defined as the interval between the date of initial documentation of a response including partial response with lymphocytosis (PRL) and the date of first documented evidence of PD or death or date of censoring per the IRC assessment. iWCLL 2008 criteria for PD: New enlarged nodes \>1.5 cm, new hepatomegaly or splenomegaly, or other organ infiltrates; \>= 50% increase from nadir in existing lymph node or \>=50% increase from nadir in sum of product of diameters of multiple nodes; \>=50% increase from nadir in enlargement of liver or spleen; \>=50% increase from baseline in lymphocyte count (and to \>=5\*10\^9/L) unless considered treatment-related lymphocytosis; new cytopenia (Hemoglobin b or platelets) attributable to CLL; transformation to a more aggressive histology.

Analysis population: Population analyzed included ITT amongst who were responders (PR or better).

Groups in this outcome

Treatment Arm A (Ibrutinib + Venetoclax)

Participants received ibrutinib 420 milligrams (mg) orally once daily for 3 cycles (each cycle is of 28 days) followed by the combination of ibrutinib 420 mg and venetoclax 400 mg orally once daily for 12 cycles (including a 5-week venetoclax dose ramp up starting in cycle 4). Participants who subsequently developed independent review committee (IRC)-confirmed progressive disease (PD) and had active disease requiring treatment were eligible to participate in the Subsequent Therapy Phase and received single-agent ibrutinib until disease progression or unacceptable toxicity.

Treatment Arm B (Chlorambucil + Obinutuzumab)

Participants received chlorambucil 0.5 milligrams per kilogram (mg/kg) body weight orally once daily on Days 1 and 15 of Cycles 1 to 6 in combination with obinutuzumab 1000 mgs intravenously (IV) once daily on Days 1, 8, and 15 of Cycle 1 and Day 1 of Cycles 2 to 6 (each cycle is of 28 days). Participants who subsequently developed IRC-confirmed progressive disease (PD) and had active disease requiring treatment were eligible to participate in the Subsequent Therapy Phase and received single-agent ibrutinib until disease progression or unacceptable toxicity.

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

Analysis denominator · Participants

GroupSource count
Treatment Arm A (Ibrutinib + Venetoclax)92
Treatment Arm B (Chlorambucil + Obinutuzumab)89

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Treatment Arm A (Ibrutinib + Venetoclax)28.85Not reported28.68NAHere "NA" indicates that upper limit of 95% CI was not estimable due to insufficient number of events.
Treatment Arm B (Chlorambucil + Obinutuzumab)21.13Not reported15.9325.10Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        Here "NA" indicates that upper limit of 95% CI was not estimable due to insufficient number of events.
        group Id
        OG000
        lower Limit
        28.68
        upper Limit
        NA
        value
        28.85
      2. group Id
        OG001
        lower Limit
        15.93
        upper Limit
        25.10
        value
        21.13
denoms
  1. counts
    1. group Id
      OG000
      value
      92
    2. group Id
      OG001
      value
      89
    units
    Participants
description
DOR is defined as the interval between the date of initial documentation of a response including partial response with lymphocytosis (PRL) and the date of first documented evidence of PD or death or date of censoring per the IRC assessment. iWCLL 2008 criteria for PD: New enlarged nodes \>1.5 cm, new hepatomegaly or splenomegaly, or other organ infiltrates; \>= 50% increase from nadir in existing lymph node or \>=50% increase from nadir in sum of product of diameters of multiple nodes; \>=50% increase from nadir in enlargement of liver or spleen; \>=50% increase from baseline in lymphocyte count (and to \>=5\*10\^9/L) unless considered treatment-related lymphocytosis; new cytopenia (Hemoglobin b or platelets) attributable to CLL; transformation to a more aggressive histology.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received ibrutinib 420 milligrams (mg) orally once daily for 3 cycles (each cycle is of 28 days) followed by the combination of ibrutinib 420 mg and venetoclax 400 mg orally once daily for 12 cycles (including a 5-week venetoclax dose ramp up starting in cycle 4). Participants who subsequently developed independent review committee (IRC)-confirmed progressive disease (PD) and had active disease requiring treatment were eligible to participate in the Subsequent Therapy Phase and received single-agent ibrutinib until disease progression or unacceptable toxicity.
    id
    OG000
    title
    Treatment Arm A (Ibrutinib + Venetoclax)
  2. description
    Participants received chlorambucil 0.5 milligrams per kilogram (mg/kg) body weight orally once daily on Days 1 and 15 of Cycles 1 to 6 in combination with obinutuzumab 1000 mgs intravenously (IV) once daily on Days 1, 8, and 15 of Cycle 1 and Day 1 of Cycles 2 to 6 (each cycle is of 28 days). Participants who subsequently developed IRC-confirmed progressive disease (PD) and had active disease requiring treatment were eligible to participate in the Subsequent Therapy Phase and received single-agent ibrutinib until disease progression or unacceptable toxicity.
    id
    OG001
    title
    Treatment Arm B (Chlorambucil + Obinutuzumab)
param Type
MEDIAN
population Description
Population analyzed included ITT amongst who were responders (PR or better).
reporting Status
POSTED
time Frame
Up to 2 years 10 months
title
Duration of Response (DOR)
type
SECONDARY
unit Of Measure
Months

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

Preserved source evidence · Not medical advice