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NCT01520909 · OUTCOME

Weighted Mean Platelet Count

Study of a New Medication for Childhood Chronic Immune Thrombocytopenia (ITP), a Blood Disorder of Low Platelet Counts That Can Lead to Bruising Easily, Bleeding Gums, and/or Bleeding Inside the Body. · Source last updated 2015-03-10

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

Measure
MEAN
Unit
Gi/L
Interval / dispersion
Standard Deviation
Time frame
Baseline and Week 12 of Part 1

What was measured

The weighted mean platelet count is defined as "the area under the platelet-time curve divided by the duration of the study (12 weeks)". Weighted mean platelet counts from baseline to week 12 of the randomized period was compared between placebo and eltrombopag using an analysis of covariance model (ANCOVA) adjusting for baseline platelet count and age cohort. For each subject the area between two adjacent visits with platelet counts was calculated. The area was calculated for all pairs of adjacent visits starting at Day 1 of randomized period and then the total sum of all the areas was divided by the total duration of time during the randomized period. For each subject, this method calculates an 'average' platelet count and it allows the possibility that subjects may have had different number of assessments during different times relative to baseline.

Analysis population: ITT Population. Only those participants with a value at Baseline and post-Baseline were analyzed.

Groups in this outcome

Part 1 (Randomized Period)-Placebo

In Part 1, participants aged between 6 and 17 years with a body weight \<27 kg received placebo 37.5 mg QD, and those with a body weight \>=27 kg received placebo 50 mg QD. Participants of East Asian ancestry received a starting dose of placebo 25 mg QD. Participants aged between 1 and 5 years received placebo 1.2 mg/kg QD; participants of East Asian ancestry received a starting dose of placebo 0.8 mg/kg/day.

Part 1 (Randomized Period) - Eltrombopag

In Part 1, participants aged between 6 and 17 years with a body weight \<27 kg received eltrombopag 37.5 mg QD, and those with a body weight \>=27 kg received eltrombopag 50 mg QD. Participants of East Asian ancestry received a starting dose of eltrombopag 25 mg QD. Participants aged between 1 and 5 years received eltrombopag 1.2 mg/kg QD; participants of East Asian ancestry received a starting dose of eltrombopag 0.8 mg/kg/day.

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

Analysis denominator · Participants

GroupSource count
Part 1 (Randomized Period)-Placebo29
Part 1 (Randomized Period) - Eltrombopag62

Reported measurements

Baseline
Values in Gi/L · Interval/dispersion: Standard Deviation
GroupValueSpreadLowerUpperComment
Part 1 (Randomized Period)-Placebo14.28.01Not reportedNot reportedNot reported
Part 1 (Randomized Period) - Eltrombopag14.08.09Not reportedNot reportedNot reported
Week 12
Values in Gi/L · Interval/dispersion: Standard Deviation
GroupValueSpreadLowerUpperComment
Part 1 (Randomized Period)-Placebo23.719.56Not reportedNot reportedNot reported
Part 1 (Randomized Period) - Eltrombopag63.946.68Not reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        spread
        8.01
        value
        14.2
      2. group Id
        OG001
        spread
        8.09
        value
        14.0
    title
    Baseline
  2. categories
    1. measurements
      1. group Id
        OG000
        spread
        19.56
        value
        23.7
      2. group Id
        OG001
        spread
        46.68
        value
        63.9
    title
    Week 12
denoms
  1. counts
    1. group Id
      OG000
      value
      29
    2. group Id
      OG001
      value
      62
    units
    Participants
description
The weighted mean platelet count is defined as "the area under the platelet-time curve divided by the duration of the study (12 weeks)". Weighted mean platelet counts from baseline to week 12 of the randomized period was compared between placebo and eltrombopag using an analysis of covariance model (ANCOVA) adjusting for baseline platelet count and age cohort. For each subject the area between two adjacent visits with platelet counts was calculated. The area was calculated for all pairs of adjacent visits starting at Day 1 of randomized period and then the total sum of all the areas was divided by the total duration of time during the randomized period. For each subject, this method calculates an 'average' platelet count and it allows the possibility that subjects may have had different number of assessments during different times relative to baseline.
dispersion Type
Standard Deviation
groups
  1. description
    In Part 1, participants aged between 6 and 17 years with a body weight \<27 kg received placebo 37.5 mg QD, and those with a body weight \>=27 kg received placebo 50 mg QD. Participants of East Asian ancestry received a starting dose of placebo 25 mg QD. Participants aged between 1 and 5 years received placebo 1.2 mg/kg QD; participants of East Asian ancestry received a starting dose of placebo 0.8 mg/kg/day.
    id
    OG000
    title
    Part 1 (Randomized Period)-Placebo
  2. description
    In Part 1, participants aged between 6 and 17 years with a body weight \<27 kg received eltrombopag 37.5 mg QD, and those with a body weight \>=27 kg received eltrombopag 50 mg QD. Participants of East Asian ancestry received a starting dose of eltrombopag 25 mg QD. Participants aged between 1 and 5 years received eltrombopag 1.2 mg/kg QD; participants of East Asian ancestry received a starting dose of eltrombopag 0.8 mg/kg/day.
    id
    OG001
    title
    Part 1 (Randomized Period) - Eltrombopag
param Type
MEAN
population Description
ITT Population. Only those participants with a value at Baseline and post-Baseline were analyzed.
reporting Status
POSTED
time Frame
Baseline and Week 12 of Part 1
title
Weighted Mean Platelet Count
type
SECONDARY
unit Of Measure
Gi/L

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

Preserved source evidence · Not medical advice