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NCT01010061 · OUTCOME

Progression-free Survival (PFS)

CLL11: A Study of Obinutuzumab (RO5072759 [GA101]) With Chlorambucil in Patients With Previously Untreated Chronic Lymphocytic Leukemia (Stage 1a) · Source last updated 2018-09-14

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
Randomization to clinical cutoff date of 10 Oct 2017 (median observation 62.5 months from randomization)

What was measured

PFS was defined as the time from randomization to the first occurrence of progression, relapse, or death from any cause as assessed by the investigator. Progressive disease (PD) required at least one of the following: ≥50% increase in the absolute number of lymphocytes, appearance of new palpable lymph nodes (\>15 mm in longest diameter) or any new extra nodal lesion, ≥50% increase in the longest diameter of any previous site of clinically significant lymphadenopathy, ≥50% increase in the enlargement of the liver and/or spleen, Transformation to a more aggressive histology or After treatment, the progression of any cytopenia (a decrease of hemoglobin levels \>20 g/L or \<10 g/dL or a decrease of platelet counts \>50% or \<100 x 10\^9/L or by a decrease of neutrophil counts \>50% or \<1.0 x 10\^9/L).

Analysis population: Intent-to-treat population included all randomized participants. Patients without PFS events were censored.

Groups in this outcome

Obinutuzumab + Chlorambucil (GClb)

Participants received 1000 mg obinutuzumab intravenous (IV) infusion, on Days 1 \[first infusion split 100 mg on Day 1 and 900 mg on Day 2 as per protocol amendment\], 8 and 15 in Cycle 1 and Day 1 in Cycles 2-6 (28-day cycles) plus chlorambucil 0.5 mg/kg orally on Day 1 and 15 of each 28-day cycle (6 Cycles).

Chlorambucil (Clb)

Participants received chlorambucil 0.5 mg/kg orally on Day 1 and 15 of each 28-day cycle (6 Cycles). Participants with Progressive Disease or within 6 months of follow-up were allowed to cross over to receive obinutuzumab + chlorambucil.

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

Analysis denominator · Participants

GroupSource count
Obinutuzumab + Chlorambucil (GClb)238
Chlorambucil (Clb)118

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Obinutuzumab + Chlorambucil (GClb)31.1Not reported26.535.6Not reported
Chlorambucil (Clb)11.1Not reported10.711.3Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.16
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.28
    estimate Comment
    Stratified by Binet stage at Baseline.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    p Value Comment
    Type I error controlled through closed test procedure.
    param Type
    Hazard Ratio (HR)
    param Value
    0.21
    statistical Method
    Log Rank, Stratified
Complete source fields
analyses
  1. ci Lower Limit
    0.16
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.28
    estimate Comment
    Stratified by Binet stage at Baseline.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    <0.0001
    p Value Comment
    Type I error controlled through closed test procedure.
    param Type
    Hazard Ratio (HR)
    param Value
    0.21
    statistical Method
    Log Rank, Stratified
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        26.5
        upper Limit
        35.6
        value
        31.1
      2. group Id
        OG001
        lower Limit
        10.7
        upper Limit
        11.3
        value
        11.1
denoms
  1. counts
    1. group Id
      OG000
      value
      238
    2. group Id
      OG001
      value
      118
    units
    Participants
description
PFS was defined as the time from randomization to the first occurrence of progression, relapse, or death from any cause as assessed by the investigator. Progressive disease (PD) required at least one of the following: ≥50% increase in the absolute number of lymphocytes, appearance of new palpable lymph nodes (\>15 mm in longest diameter) or any new extra nodal lesion, ≥50% increase in the longest diameter of any previous site of clinically significant lymphadenopathy, ≥50% increase in the enlargement of the liver and/or spleen, Transformation to a more aggressive histology or After treatment, the progression of any cytopenia (a decrease of hemoglobin levels \>20 g/L or \<10 g/dL or a decrease of platelet counts \>50% or \<100 x 10\^9/L or by a decrease of neutrophil counts \>50% or \<1.0 x 10\^9/L).
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received 1000 mg obinutuzumab intravenous (IV) infusion, on Days 1 \[first infusion split 100 mg on Day 1 and 900 mg on Day 2 as per protocol amendment\], 8 and 15 in Cycle 1 and Day 1 in Cycles 2-6 (28-day cycles) plus chlorambucil 0.5 mg/kg orally on Day 1 and 15 of each 28-day cycle (6 Cycles).
    id
    OG000
    title
    Obinutuzumab + Chlorambucil (GClb)
  2. description
    Participants received chlorambucil 0.5 mg/kg orally on Day 1 and 15 of each 28-day cycle (6 Cycles). Participants with Progressive Disease or within 6 months of follow-up were allowed to cross over to receive obinutuzumab + chlorambucil.
    id
    OG001
    title
    Chlorambucil (Clb)
param Type
MEDIAN
population Description
Intent-to-treat population included all randomized participants. Patients without PFS events were censored.
reporting Status
POSTED
time Frame
Randomization to clinical cutoff date of 10 Oct 2017 (median observation 62.5 months from randomization)
title
Progression-free Survival (PFS)
type
PRIMARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice