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NCT02514447 · OUTCOME

Occurrence of Severe (Grade 4) Neutropenia

Trilaciclib (G1T28) in Patients With Previously Treated Extensive Stage SCLC Receiving Topotecan Chemotherapy · Source last updated 2025-09-25

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
During the treatment period. From date of first dose (Part 1)/randomization (Part 2), 21 day treatment cycles continue until disease progression, unacceptable toxicity, or discontinuation by the patient or investigator (assessed up to 1090 days).

What was measured

Number of Participants with severe (Grade 4) neutropenia (SN) was a binary variable. If a patient had at least 1 absolute neutrophil count value \<0.5 × 10\^9/L during the Treatment Period, the patient was assigned as Yes to the occurrence of SN; otherwise, it was No.

Analysis population: The intent-to-treat (ITT) analysis set: All enrolled patients who received at least one dose of study drugs in Part 1 and all randomized patients in Part 2 on the basis of the assigned treatment.

Groups in this outcome

Placebo + Topotecan 1.5 mg/m² - Parts 2a and 2b

Patients in Parts 2a and 2b were randomized 1:2 to placebo. Patients received placebo administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of placebo on Days 1 to 5, patients received IV topotecan (1.5 mg/m²). Placebos Topotecan

Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Part 2a

Patients in Part 2a were randomized 2:1 to trilaciclib. Patients received trilaciclib (240 mg/m²) administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²). Trilaciclib Topotecan

Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.5 mg/m² - Part 2b

Patients in Part 2b were randomized 2:1 to trilaciclib. Patients received trilaciclib (240 mg/m²) administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.5 mg/m²). Trilaciclib Topotecan

Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.5 mg/m² - Cohort 1- Part 1

Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.50 mg/m²).

Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.25 mg/m² - Cohort 2- Part 1

Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.25 mg/m²).

Trilaciclib (G1T28) 200 mg/m² + Topotecan 0.75 mg/m² - Cohort 3- Part 1

Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).

Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Cohorts 4 and 6- Part 1

Patients received trilaciclib (240 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).

Trilaciclib (G1T28) 280 mg/m² + Topotecan 0.75 mg/m² - Cohort 5- Part 1

Patients received trilaciclib (280 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).

Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.0 mg/m² - Cohort 7- Part 1

Patients received trilaciclib (240 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.0 mg/m²).

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

Analysis denominator · Participants

GroupSource count
Placebo + Topotecan 1.5 mg/m² - Parts 2a and 2b29
Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Part 2a30
Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.5 mg/m² - Part 2b32
Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.5 mg/m² - Cohort 1- Part 12
Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.25 mg/m² - Cohort 2- Part 13
Trilaciclib (G1T28) 200 mg/m² + Topotecan 0.75 mg/m² - Cohort 3- Part 14
Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Cohorts 4 and 6- Part 18
Trilaciclib (G1T28) 280 mg/m² + Topotecan 0.75 mg/m² - Cohort 5- Part 17
Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.0 mg/m² - Cohort 7- Part 18

Reported measurements

Source class 1
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Placebo + Topotecan 1.5 mg/m² - Parts 2a and 2b22Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Part 2a5Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.5 mg/m² - Part 2b13Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.5 mg/m² - Cohort 1- Part 12Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.25 mg/m² - Cohort 2- Part 12Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 200 mg/m² + Topotecan 0.75 mg/m² - Cohort 3- Part 11Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Cohorts 4 and 6- Part 10Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 280 mg/m² + Topotecan 0.75 mg/m² - Cohort 5- Part 12Not reportedNot reportedNot reportedNot reported
Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.0 mg/m² - Cohort 7- Part 13Not reportedNot reportedNot reportedNot reported

Source statistical analyses

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

  1. group Description
    The occurrence of SN was a binary variable. Treatment group difference was analyzed using modified Poisson regression to account for the variable duration of the Treatment Period for each patient. The model included baseline ANC as a covariate, stratification factors of ECOG performance status (0 or 1 vs 2), sensitivity to 1st line treatment (sensitive or resistant), and treatment as fixed effects. The logarithm transformation of # of cycles was included as an offset variable in the modeling.
    group Ids
    1. OG000
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0160
    p Value Comment
    A Hochberg-based gatekeeping procedure was used to control the global familywise error rate across the multiple null hypotheses (primary and key secondary myelosuppression efficacy endpoints) in a strong sense at a 1-sided 0.10 level.
    statistical Comment
    Hochberg-based gatekeeping procedure
    statistical Method
    Modified Poisson
Complete source fields
analyses
  1. group Description
    The occurrence of SN was a binary variable. Treatment group difference was analyzed using modified Poisson regression to account for the variable duration of the Treatment Period for each patient. The model included baseline ANC as a covariate, stratification factors of ECOG performance status (0 or 1 vs 2), sensitivity to 1st line treatment (sensitive or resistant), and treatment as fixed effects. The logarithm transformation of # of cycles was included as an offset variable in the modeling.
    group Ids
    1. OG000
    2. OG002
    non Inferiority Type
    SUPERIORITY
    p Value
    0.0160
    p Value Comment
    A Hochberg-based gatekeeping procedure was used to control the global familywise error rate across the multiple null hypotheses (primary and key secondary myelosuppression efficacy endpoints) in a strong sense at a 1-sided 0.10 level.
    statistical Comment
    Hochberg-based gatekeeping procedure
    statistical Method
    Modified Poisson
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        22
      2. group Id
        OG001
        value
        5
      3. group Id
        OG002
        value
        13
      4. group Id
        OG003
        value
        2
      5. group Id
        OG004
        value
        2
      6. group Id
        OG005
        value
        1
      7. group Id
        OG006
        value
        0
      8. group Id
        OG007
        value
        2
      9. group Id
        OG008
        value
        3
denoms
  1. counts
    1. group Id
      OG000
      value
      29
    2. group Id
      OG001
      value
      30
    3. group Id
      OG002
      value
      32
    4. group Id
      OG003
      value
      2
    5. group Id
      OG004
      value
      3
    6. group Id
      OG005
      value
      4
    7. group Id
      OG006
      value
      8
    8. group Id
      OG007
      value
      7
    9. group Id
      OG008
      value
      8
    units
    Participants
description
Number of Participants with severe (Grade 4) neutropenia (SN) was a binary variable. If a patient had at least 1 absolute neutrophil count value \<0.5 × 10\^9/L during the Treatment Period, the patient was assigned as Yes to the occurrence of SN; otherwise, it was No.
groups
  1. description
    Patients in Parts 2a and 2b were randomized 1:2 to placebo. Patients received placebo administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of placebo on Days 1 to 5, patients received IV topotecan (1.5 mg/m²). Placebos Topotecan
    id
    OG000
    title
    Placebo + Topotecan 1.5 mg/m² - Parts 2a and 2b
  2. description
    Patients in Part 2a were randomized 2:1 to trilaciclib. Patients received trilaciclib (240 mg/m²) administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²). Trilaciclib Topotecan
    id
    OG001
    title
    Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Part 2a
  3. description
    Patients in Part 2b were randomized 2:1 to trilaciclib. Patients received trilaciclib (240 mg/m²) administered IV once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.5 mg/m²). Trilaciclib Topotecan
    id
    OG002
    title
    Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.5 mg/m² - Part 2b
  4. description
    Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.50 mg/m²).
    id
    OG003
    title
    Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.5 mg/m² - Cohort 1- Part 1
  5. description
    Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.25 mg/m²).
    id
    OG004
    title
    Trilaciclib (G1T28) 200 mg/m² + Topotecan 1.25 mg/m² - Cohort 2- Part 1
  6. description
    Patients received trilaciclib (200 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).
    id
    OG005
    title
    Trilaciclib (G1T28) 200 mg/m² + Topotecan 0.75 mg/m² - Cohort 3- Part 1
  7. description
    Patients received trilaciclib (240 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).
    id
    OG006
    title
    Trilaciclib (G1T28) 240 mg/m² + Topotecan 0.75 mg/m² - Cohorts 4 and 6- Part 1
  8. description
    Patients received trilaciclib (280 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (0.75 mg/m²).
    id
    OG007
    title
    Trilaciclib (G1T28) 280 mg/m² + Topotecan 0.75 mg/m² - Cohort 5- Part 1
  9. description
    Patients received trilaciclib (240 mg/m²) administered intravenously (IV) once daily on Days 1 to 5 of each 21-day topotecan chemotherapy cycle. Following administration of trilaciclib on Days 1 to 5, patients received IV topotecan (1.0 mg/m²).
    id
    OG008
    title
    Trilaciclib (G1T28) 240 mg/m² + Topotecan 1.0 mg/m² - Cohort 7- Part 1
param Type
COUNT_OF_PARTICIPANTS
population Description
The intent-to-treat (ITT) analysis set: All enrolled patients who received at least one dose of study drugs in Part 1 and all randomized patients in Part 2 on the basis of the assigned treatment.
reporting Status
POSTED
time Frame
During the treatment period. From date of first dose (Part 1)/randomization (Part 2), 21 day treatment cycles continue until disease progression, unacceptable toxicity, or discontinuation by the patient or investigator (assessed up to 1090 days).
title
Occurrence of Severe (Grade 4) Neutropenia
type
PRIMARY
unit Of Measure
Participants

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Preserved source evidence · Not medical advice