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NCT02598661 · OUTCOME

Phase 2 and Phase 3: Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Deaths

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
COUNT_OF_PARTICIPANTS
Unit
Participants
Interval / dispersion
Not reported
Time frame
Adverse events: Up to 5 years in Phase 2 and up to 3.7 years in Phase 3; Deaths: Up to 6.6 years in Phase 2 and up to 4 years in Phase 3

What was measured

TEAEs were defined as those events that 1) occurred after the first dose of study drug, through the treatment phase, and for 30 days following the last dose of study drug or until subsequent anti-cancer therapy if earlier; 2) any event that was considered study drug-related regardless of the start date of the event; or 3) any event that was presented at baseline but worsened in severity or was subsequently considered drug-related by the investigator. Serious TEAEs are any TEAEs that result in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product, is medically important. Any clinically significant vital sign measurements, clinical laboratory values, and electrocardiogram (ECG) findings were reported as TEAEs. TEAEs included both serious and non-serious TEAEs.

Analysis population: Phase 2 and Phase 3: Safety Analysis Set included all participants who received at least one dose of study drug.

Groups in this outcome

Phase 2: Imetelstat Sodium (No Dose Escalation)

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 2: Imetelstat Sodium (Escalated to 9.4 mg/kg)

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

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 Sodium (No Dose Escalation)50
Phase 2: Imetelstat Sodium (Escalated to 9.4 mg/kg)7
Phase 3: Imetelstat Sodium118
Phase 3: Placebo59

Reported measurements

Participants with AEs
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Phase 2: Imetelstat Sodium (No Dose Escalation)50Not reportedNot reportedNot reportedNot reported
Phase 2: Imetelstat Sodium (Escalated to 9.4 mg/kg)6Not reportedNot reportedNot reportedNot reported
Phase 3: Imetelstat Sodium117Not reportedNot reportedNot reportedNot reported
Phase 3: Placebo59Not reportedNot reportedNot reportedNot reported
Participants who died
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Phase 2: Imetelstat Sodium (No Dose Escalation)24Not reportedNot reportedNot reportedNot reported
Phase 2: Imetelstat Sodium (Escalated to 9.4 mg/kg)3Not reportedNot reportedNot reportedNot reported
Phase 3: Imetelstat Sodium35Not reportedNot reportedNot reportedNot reported
Phase 3: Placebo15Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        50
      2. group Id
        OG001
        value
        6
      3. group Id
        OG002
        value
        117
      4. group Id
        OG003
        value
        59
    title
    Participants with AEs
  2. categories
    1. measurements
      1. group Id
        OG000
        value
        24
      2. group Id
        OG001
        value
        3
      3. group Id
        OG002
        value
        35
      4. group Id
        OG003
        value
        15
    title
    Participants who died
denoms
  1. counts
    1. group Id
      OG000
      value
      50
    2. group Id
      OG001
      value
      7
    3. group Id
      OG002
      value
      118
    4. group Id
      OG003
      value
      59
    units
    Participants
description
TEAEs were defined as those events that 1) occurred after the first dose of study drug, through the treatment phase, and for 30 days following the last dose of study drug or until subsequent anti-cancer therapy if earlier; 2) any event that was considered study drug-related regardless of the start date of the event; or 3) any event that was presented at baseline but worsened in severity or was subsequently considered drug-related by the investigator. Serious TEAEs are any TEAEs that result in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product, is medically important. Any clinically significant vital sign measurements, clinical laboratory values, and electrocardiogram (ECG) findings were reported as TEAEs. TEAEs included both serious and non-serious TEAEs.
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.
    id
    OG000
    title
    Phase 2: Imetelstat Sodium (No Dose Escalation)
  2. description
    Imetelstat sodium administered IV, at a starting dose of 7.5 mg/kg, every 4 weeks (on a 28-day cycle) with dose escalation to 9.4 mg/kg allowed before Protocol Amendment 2, until death, lost to follow up, withdrawal of consent, or study termination, whichever occurs first.
    id
    OG001
    title
    Phase 2: Imetelstat Sodium (Escalated to 9.4 mg/kg)
  3. 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
    OG002
    title
    Phase 3: Imetelstat Sodium
  4. 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
    OG003
    title
    Phase 3: Placebo
param Type
COUNT_OF_PARTICIPANTS
population Description
Phase 2 and Phase 3: Safety Analysis Set included all participants who received at least one dose of study drug.
reporting Status
POSTED
time Frame
Adverse events: Up to 5 years in Phase 2 and up to 3.7 years in Phase 3; Deaths: Up to 6.6 years in Phase 2 and up to 4 years in Phase 3
title
Phase 2 and Phase 3: Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Deaths
type
SECONDARY
unit Of Measure
Participants

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