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NCT02598661 · OUTCOME

Phase 2 and Phase 3: Amount of RBC Transfusions in the Best 8-week Interval

Study to Evaluate Imetelstat (GRN163L) in Participants With International Prognostic Scoring System (IPSS) Low or Intermediate-1 Risk Myelodysplastic Syndrome (MDS) · Source last updated 2026-07-17

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

Measure
MEAN
Unit
number of RBC transfusions units
Interval / dispersion
Standard Deviation
Time frame
Up to 5 years in Phase 2 and up to 3.7 years in Phase 3

What was measured

Amount of RBC transfusions for 8-week interval was defined as the total number of RBC transfusion units in a given 8-week interval during study. The best 8-week interval is a post-baseline 8-week interval where the participant had the fewest post-Study Day 1 RBC transfusion units. A valid 8-week period must start before the date of last dose of study drug + 30 days or end of treatment (EOT) visit whichever occurs first and ends before the first transfusion in post-treatment follow-up or the first day of subsequent anti-cancer therapy whichever occurs first.

Analysis population: Phase 2: All Treated Analysis Set included all participants who received at least one dose of study drug. Phase 3: ITT Analysis Set included all participants randomized into the Phase 3 study.

Groups in this outcome

Phase 2: Imetelstat Sodium

Imetelstat sodium administered IV, at a starting dose of 7.5 mg/kg, every 4 weeks (on a 28-day cycle) until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first. Dose escalation to 9.4 mg/kg was allowed before Protocol Amendment 2.

Phase 3: Imetelstat Sodium

Imetelstat sodium administered IV, at a starting dose of 7.5 mg/kg, every 4 weeks (on a 28-day cycle) until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first.

Phase 3: Placebo

Imetelstat sodium-matching placebo administered IV, every 4 weeks (on a 28-day cycle), until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first.

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

Analysis denominator · Participants

GroupSource count
Phase 2: Imetelstat Sodium57
Phase 3: Imetelstat Sodium118
Phase 3: Placebo60

Reported measurements

Source class 1
Values in number of RBC transfusions units · Interval/dispersion: Standard Deviation
GroupValueSpreadLowerUpperComment
Phase 2: Imetelstat Sodium3.03.48Not reportedNot reportedNot reported
Phase 3: Imetelstat Sodium3.13.62Not reportedNot reportedNot reported
Phase 3: Placebo3.42.13Not reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        spread
        3.48
        value
        3.0
      2. group Id
        OG001
        spread
        3.62
        value
        3.1
      3. group Id
        OG002
        spread
        2.13
        value
        3.4
denoms
  1. counts
    1. group Id
      OG000
      value
      57
    2. group Id
      OG001
      value
      118
    3. group Id
      OG002
      value
      60
    units
    Participants
description
Amount of RBC transfusions for 8-week interval was defined as the total number of RBC transfusion units in a given 8-week interval during study. The best 8-week interval is a post-baseline 8-week interval where the participant had the fewest post-Study Day 1 RBC transfusion units. A valid 8-week period must start before the date of last dose of study drug + 30 days or end of treatment (EOT) visit whichever occurs first and ends before the first transfusion in post-treatment follow-up or the first day of subsequent anti-cancer therapy whichever occurs first.
dispersion Type
Standard Deviation
groups
  1. description
    Imetelstat sodium administered IV, at a starting dose of 7.5 mg/kg, every 4 weeks (on a 28-day cycle) until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first. Dose escalation to 9.4 mg/kg was allowed before Protocol Amendment 2.
    id
    OG000
    title
    Phase 2: Imetelstat Sodium
  2. description
    Imetelstat sodium administered IV, at a starting dose of 7.5 mg/kg, every 4 weeks (on a 28-day cycle) until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first.
    id
    OG001
    title
    Phase 3: Imetelstat Sodium
  3. description
    Imetelstat sodium-matching placebo administered IV, every 4 weeks (on a 28-day cycle), until death, lost to follow-up, withdrawal of consent, or study termination whichever occurs first.
    id
    OG002
    title
    Phase 3: Placebo
param Type
MEAN
population Description
Phase 2: All Treated Analysis Set included all participants who received at least one dose of study drug. Phase 3: ITT Analysis Set included all participants randomized into the Phase 3 study.
reporting Status
POSTED
time Frame
Up to 5 years in Phase 2 and up to 3.7 years in Phase 3
title
Phase 2 and Phase 3: Amount of RBC Transfusions in the Best 8-week Interval
type
SECONDARY
unit Of Measure
number of RBC transfusions units

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

Preserved source evidence · Not medical advice