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NCT01444417 · OUTCOME

Percentage of Participants With an Overall Platelet Response

Safety and Efficacy Study of Romiplostim to Treat Immune Thrombocytopenia (ITP) in Pediatric Patients · Source last updated 2017-02-09

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

Measure
NUMBER
Unit
percentage of participants
Interval / dispersion
95% Confidence Interval
Time frame
Week 2 to week 25

What was measured

Overall platelet response is defined as either a durable platelet response or transient platelet response. Durable platelet response was defined as weekly platelet count ≥ 50 x 10\^9/L for 6 or more times during week 18 to week 25 measurements. Participants may not have had a weekly response within 4 weeks after receiving any rescue medication. Transient platelet response was defined as weekly platelet count ≥ 50 x 10\^9/L for 4 or more times during week 2 to week 25 measurements but without durable platelet response. Participants may not have had a weekly response within 4 weeks after receiving any rescue medications.

Analysis population: Efficacy analysis set

Groups in this outcome

Placebo

Participants received weekly subcutaneous placebo for 24 weeks.

Romiplostim

Participants received once weekly subcutaneous romiplostim for 24 weeks at a starting dose of 1 µg/kg; weekly dose increases continued in increments of 1 µg/kg/week to a maximum dose of 10 µg/kg in an attempt to reach a target platelet count of ≥ 50 x 10\^9/L.

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

Analysis denominator · Participants

GroupSource count
Placebo20
Romiplostim42

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Placebo20.0Not reported5.743.7Not reported
Romiplostim71.4Not reported55.484.3Not reported

Source statistical analyses

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

  1. ci Lower Limit
    2.535
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    32.265
    group Description
    The incidence of overall platelet response was compared by the Cochran-Mantel-Haenszel test stratified by the baseline age group. The Mantel-Haenszel common odds ratio (romiplostim vs placebo) was estimated along with its 95% confidence interval.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    0.0002
    param Type
    Odds Ratio (OR)
    param Value
    9.0443
    statistical Comment
    P-value from Cochran-Mantel-Haenszel test stratified by baseline age group.
    statistical Method
    Cochran-Mantel-Haenszel
Complete source fields
analyses
  1. ci Lower Limit
    2.535
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    32.265
    group Description
    The incidence of overall platelet response was compared by the Cochran-Mantel-Haenszel test stratified by the baseline age group. The Mantel-Haenszel common odds ratio (romiplostim vs placebo) was estimated along with its 95% confidence interval.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY_OR_OTHER
    p Value
    0.0002
    param Type
    Odds Ratio (OR)
    param Value
    9.0443
    statistical Comment
    P-value from Cochran-Mantel-Haenszel test stratified by baseline age group.
    statistical Method
    Cochran-Mantel-Haenszel
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        5.7
        upper Limit
        43.7
        value
        20.0
      2. group Id
        OG001
        lower Limit
        55.4
        upper Limit
        84.3
        value
        71.4
denoms
  1. counts
    1. group Id
      OG000
      value
      20
    2. group Id
      OG001
      value
      42
    units
    Participants
description
Overall platelet response is defined as either a durable platelet response or transient platelet response. Durable platelet response was defined as weekly platelet count ≥ 50 x 10\^9/L for 6 or more times during week 18 to week 25 measurements. Participants may not have had a weekly response within 4 weeks after receiving any rescue medication. Transient platelet response was defined as weekly platelet count ≥ 50 x 10\^9/L for 4 or more times during week 2 to week 25 measurements but without durable platelet response. Participants may not have had a weekly response within 4 weeks after receiving any rescue medications.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received weekly subcutaneous placebo for 24 weeks.
    id
    OG000
    title
    Placebo
  2. description
    Participants received once weekly subcutaneous romiplostim for 24 weeks at a starting dose of 1 µg/kg; weekly dose increases continued in increments of 1 µg/kg/week to a maximum dose of 10 µg/kg in an attempt to reach a target platelet count of ≥ 50 x 10\^9/L.
    id
    OG001
    title
    Romiplostim
param Type
NUMBER
population Description
Efficacy analysis set
reporting Status
POSTED
time Frame
Week 2 to week 25
title
Percentage of Participants With an Overall Platelet Response
type
SECONDARY
unit Of Measure
percentage of participants

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

Preserved source evidence · Not medical advice