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NCT01773395 · OUTCOME

18-Month Progression Free Survival

GVAX vs. Placebo for MDS/AML After Allo HSCT · Source last updated 2022-07-18

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
NUMBER
Unit
Percentage
Interval / dispersion
95% Confidence Interval
Time frame
18 months

What was measured

Progression-Free Survival (PFS) at 18 months after randomization. Progression-free survival is defined as time from randomization to progression of disease or death whichever occurs first. Patients with relapse/progressive disease who re-enter remission after vaccination or upon withdrawal of immune suppression alone will not be considered as having disease progression. The primary analysis will be performed using the modified intention-to-treat (ITT) principle, i.e., all transplanted and eligible patients who receive at least one vaccination will be included in the analysis according to the treatment arm they are randomized to. Patients who have not progressed and are alive are censored at the date the patient is known to be progression-free. Progression is defined by either morphological evidence of acute leukemia or MDS consistent with pre-transplant features is defined by either morphological evidence of acute leukemia or MDS consistent with pre-transplant features

Groups in this outcome

GVAX

GVAX vaccine Participants in the GVAX vaccine arm will undergo a conditioning regimen with busulfan and fludarabine prior to allogeneic hematopoietic stem cell transplant. Immediately after allogeneic hematopoietic stem cell transplant participants will start tacrolimus and methotrexate to prevent GVHD. Conditioning regimen: In this study the condition regimen will include 2 chemotherapy drugs: busulfan (twice a day or four times a day for 4 days) and fludarabine (once daily for 4 days). Depending on participant's age, and other clinical factors, the transplant doctor will decide whether the participant will receive a higher or lower dose of busulfan. Allogeneic Hematopoietic Stem Cell Transplant: Between 1-2 days after participant finishes the chemotherapy, the participant will receive the blood stem cell or marrow from their donor. GVHD Prevention: * Tacrolimus- This will be taken orally twice daily start 3 days before the transplant, and will continue for about 6-9 months. * Methotrexate- This will be given a short intravenous infusion on days 1, 3, 6, and 11 after the transplant. GVAX: GVAX vaccination will begin between 30 to 45 days following participant's transplant, provided participant meets vaccination initiation criteria.

Placebo

Placebo vaccine Participants in the placebo vaccine arm will undergo a conditioning regimen with busulfan and fludarabine prior to allogeneic hematopoietic stem cell transplant. Immediately after allogeneic hematopoietic stem cell transplant participants will start tacrolimus and methotrexate to prevent GVHD. Conditioning regimen: In this study the condition regimen will include 2 chemotherapy drugs: busulfan (twice a day or four times a day for 4 days) and fludarabine (once daily for 4 days). Depending on participant's age, and other clinical factors, the transplant doctor will decide whether the participant will receive a higher or lower dose of busulfan. Allogeneic Hematopoietic Stem Cell Transplant: Between 1-2 days after participant finishes the chemotherapy, the participant will receive the blood stem cell or marrow from their donor. GVHD Prevention: * Tacrolimus- This will be taken orally twice daily start 3 days before the transplant, and will continue for about 6-9 months. * Methotrexate- This will be given a short intravenous infusion on days 1, 3, 6, and 11 after the transplant. Placebo: Placebo vaccination will begin between 30 to 45 days following participant's transplant, provided participant meets vaccination initiation criteria.

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

Analysis denominator · Participants

GroupSource count
GVAX30
Placebo27

Reported measurements

Source class 1
Values in Percentage · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
GVAX53Not reported3469Not reported
Placebo55Not reported3572Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        34
        upper Limit
        69
        value
        53
      2. group Id
        OG001
        lower Limit
        35
        upper Limit
        72
        value
        55
denoms
  1. counts
    1. group Id
      OG000
      value
      30
    2. group Id
      OG001
      value
      27
    units
    Participants
description
Progression-Free Survival (PFS) at 18 months after randomization. Progression-free survival is defined as time from randomization to progression of disease or death whichever occurs first. Patients with relapse/progressive disease who re-enter remission after vaccination or upon withdrawal of immune suppression alone will not be considered as having disease progression. The primary analysis will be performed using the modified intention-to-treat (ITT) principle, i.e., all transplanted and eligible patients who receive at least one vaccination will be included in the analysis according to the treatment arm they are randomized to. Patients who have not progressed and are alive are censored at the date the patient is known to be progression-free. Progression is defined by either morphological evidence of acute leukemia or MDS consistent with pre-transplant features is defined by either morphological evidence of acute leukemia or MDS consistent with pre-transplant features
dispersion Type
95% Confidence Interval
groups
  1. description
    GVAX vaccine Participants in the GVAX vaccine arm will undergo a conditioning regimen with busulfan and fludarabine prior to allogeneic hematopoietic stem cell transplant. Immediately after allogeneic hematopoietic stem cell transplant participants will start tacrolimus and methotrexate to prevent GVHD. Conditioning regimen: In this study the condition regimen will include 2 chemotherapy drugs: busulfan (twice a day or four times a day for 4 days) and fludarabine (once daily for 4 days). Depending on participant's age, and other clinical factors, the transplant doctor will decide whether the participant will receive a higher or lower dose of busulfan. Allogeneic Hematopoietic Stem Cell Transplant: Between 1-2 days after participant finishes the chemotherapy, the participant will receive the blood stem cell or marrow from their donor. GVHD Prevention: * Tacrolimus- This will be taken orally twice daily start 3 days before the transplant, and will continue for about 6-9 months. * Methotrexate- This will be given a short intravenous infusion on days 1, 3, 6, and 11 after the transplant. GVAX: GVAX vaccination will begin between 30 to 45 days following participant's transplant, provided participant meets vaccination initiation criteria.
    id
    OG000
    title
    GVAX
  2. description
    Placebo vaccine Participants in the placebo vaccine arm will undergo a conditioning regimen with busulfan and fludarabine prior to allogeneic hematopoietic stem cell transplant. Immediately after allogeneic hematopoietic stem cell transplant participants will start tacrolimus and methotrexate to prevent GVHD. Conditioning regimen: In this study the condition regimen will include 2 chemotherapy drugs: busulfan (twice a day or four times a day for 4 days) and fludarabine (once daily for 4 days). Depending on participant's age, and other clinical factors, the transplant doctor will decide whether the participant will receive a higher or lower dose of busulfan. Allogeneic Hematopoietic Stem Cell Transplant: Between 1-2 days after participant finishes the chemotherapy, the participant will receive the blood stem cell or marrow from their donor. GVHD Prevention: * Tacrolimus- This will be taken orally twice daily start 3 days before the transplant, and will continue for about 6-9 months. * Methotrexate- This will be given a short intravenous infusion on days 1, 3, 6, and 11 after the transplant. Placebo: Placebo vaccination will begin between 30 to 45 days following participant's transplant, provided participant meets vaccination initiation criteria.
    id
    OG001
    title
    Placebo
param Type
NUMBER
reporting Status
POSTED
time Frame
18 months
title
18-Month Progression Free Survival
type
PRIMARY
unit Of Measure
Percentage

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Preserved source evidence · Not medical advice