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    Clinical Trial Results:
    A Phase 3, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Study of Fostamatinib Disodium in the Treatment of Persistent/Chronic Immune Thrombocytopenic Purpura

    Summary
    EudraCT number
    2013-005452-15
    Trial protocol
    GB   IT   HU   NL   DK  
    Global end of trial date
    21 Apr 2016

    Results information
    Results version number
    v1(current)
    This version publication date
    08 Apr 2021
    First version publication date
    08 Apr 2021
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    C-935788-047
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT02076399
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Rigel Pharmaceuticals, Inc.
    Sponsor organisation address
    1180 Veterans Blvd , South San Francisco, CA, United States, 94080
    Public contact
    Clinical trials, Rigel Pharmaceuticals, Inc., +1 650-624-1100, clinicaltrials@rigel.com
    Scientific contact
    Clinical trials, Rigel Pharmaceuticals, Inc., +1 650-624-1100, clinicaltrials@rigel.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    03 Mar 2017
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    21 Apr 2016
    Global end of trial reached?
    Yes
    Global end of trial date
    21 Apr 2016
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective of this study was to establish the efficacy of fostamatinib as compared with placebo in achieving a stable platelet response in subjects with persistent/chronic ITP.
    Protection of trial subjects
    The study was conducted in accordance with Good Clinical Practice (GCP) and the Declaration of Helsinki.
    Background therapy
    -
    Evidence for comparator
    Placebo OFC tablets were provided to match the appearance of fostamatinib 100 mg and 150 mg OFC tablets. Tablets were administered orally bid using the same escalation scheme as fostamatinib tablets over the course of 24 weeks.
    Actual start date of recruitment
    14 Jul 2014
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Netherlands: 1
    Country: Number of subjects enrolled
    United Kingdom: 25
    Country: Number of subjects enrolled
    Denmark: 2
    Country: Number of subjects enrolled
    Hungary: 3
    Country: Number of subjects enrolled
    Italy: 7
    Country: Number of subjects enrolled
    United States: 20
    Country: Number of subjects enrolled
    Canada: 5
    Country: Number of subjects enrolled
    Australia: 13
    Worldwide total number of subjects
    76
    EEA total number of subjects
    13
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    50
    From 65 to 84 years
    22
    85 years and over
    4

    Subject disposition

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    Recruitment
    Recruitment details
    Approximately 75 subjects were planned to be enrolled at multiple sites. Seventy-six subjects were enrolled, and all enrolled subjects were included in the efficacy and safety analyses. 76 patients were enrolled from July 2014 to April 2016.

    Pre-assignment
    Screening details
    A total of 117 subjects were screened, 41 subjects failed screening (primarily they did not meet inclusion criteria or did meet one or more exclusion criterion), and the remaining 76 subjects were randomized; 51 to the fostamatinib group and 25 to the placebo group (ITT population). One subject (1.3% overall) was lost to follow-up.

    Period 1
    Period 1 title
    Overall trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Fostamatinib Recipient
    Arm description
    Fostamatinib (100 mg PO bid or 150 mg PO bid)
    Arm type
    Experimental

    Investigational medicinal product name
    Fostamatinib Disodium
    Investigational medicinal product code
    R935788
    Other name
    R788, Fostamatinib
    Pharmaceutical forms
    Film-coated tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Subjects begin with Fostamatinib Disodium tablet 100 mg PO bid and increase to 150 mg big after week 4 based on platelet count and tolerability.

    Arm title
    Placebo Recipient
    Arm description
    Placebo
    Arm type
    Placebo

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Film-coated tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Placebo tablet PO bid (morning and evening) over the course of 24 weeks

    Number of subjects in period 1
    Fostamatinib Recipient Placebo Recipient
    Started
    51
    25
    Completed
    12
    1
    Not completed
    39
    24
         Physician decision
    1
    -
         Subject decision
    1
    -
         AE meeting study specific discontinuation criteria
    4
    1
         Subject uncooperative or noncompliant
    1
    -
         Lost to follow-up
    1
    -
         other adverse event
    3
    1
         Lack of efficacy
    28
    22

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Fostamatinib Recipient
    Reporting group description
    Fostamatinib (100 mg PO bid or 150 mg PO bid)

    Reporting group title
    Placebo Recipient
    Reporting group description
    Placebo

    Reporting group values
    Fostamatinib Recipient Placebo Recipient Total
    Number of subjects
    51 25 76
    Age categorical
    Units: Subjects
        In utero
    0
        Preterm newborn infants (gestational age < 37 wks)
    0
        Newborns (0-27 days)
    0
        Infants and toddlers (28 days-23 months)
    0
        Children (2-11 years)
    0
        Adolescents (12-17 years)
    0
        Adults (18-64 years)
    0
        From 65-84 years
    0
        85 years and over
    0
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    57.3 ± 17.7 53.2 ± 16 -
    Gender categorical
    Units: Subjects
        Female
    30 17 47
        Male
    21 8 29
    Ethnicity (NIH/OMB)
    Units: Subjects
        Hispanic or Latino
    3 1 4
        Not Hispanic or Latino
    48 24 72
        Unknown or Not Reported
    0 0 0
    Race (NIH/OMB)
    Units: Subjects
        American Indian or Alaska Native
    0 0 0
        Asian
    3 2 5
        Native Hawaiian or Other Pacific Islander
    0 0 0
        Black or African American
    2 2 4
        White
    44 21 65
        More than one race
    0 0 0
        Unknown or Not Reported
    2 0 2

    End points

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    End points reporting groups
    Reporting group title
    Fostamatinib Recipient
    Reporting group description
    Fostamatinib (100 mg PO bid or 150 mg PO bid)

    Reporting group title
    Placebo Recipient
    Reporting group description
    Placebo

    Primary: Number of Participants With Stable Platelet Response (Count of ≥50,000/µL on at Least 4 of the Last 6 Scheduled Visits Between Weeks 14 and 24)

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    End point title
    Number of Participants With Stable Platelet Response (Count of ≥50,000/µL on at Least 4 of the Last 6 Scheduled Visits Between Weeks 14 and 24)
    End point description
    A stable platelet response by Week 24 defined as a platelet count of at least 50,000/μL on at least 4 of the last 6 scheduled visits between Weeks 14 and 24.
    End point type
    Primary
    End point timeframe
    From Week 14 to Week 24
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    51
    25
    Units: no. of participants
    9
    0
    Statistical analysis title
    Analysis for primary endpoint
    Comparison groups
    Fostamatinib Recipient v Placebo Recipient
    Number of subjects included in analysis
    76
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.0261
    Method
    Fisher exact
    Parameter type
    Risk difference (RD)
    Point estimate
    17.6
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    7.2
         upper limit
    28.1

    Secondary: Number of Participants With Platelet Count ≥ 50,000/µL at Week 12

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    End point title
    Number of Participants With Platelet Count ≥ 50,000/µL at Week 12
    End point description
    Platelet Count ≥ 50,000/µL at Week 12
    End point type
    Secondary
    End point timeframe
    Week 12
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    51
    25
    Units: no.of participants
    11
    0
    No statistical analyses for this end point

    Secondary: Number of Participants With Platelet Count ≥ 50,000/µL at Week 24

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    End point title
    Number of Participants With Platelet Count ≥ 50,000/µL at Week 24
    End point description
    Platelet Count ≥ 50,000/µL at Week 24
    End point type
    Secondary
    End point timeframe
    Week 24
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    51
    25
    Units: no. of participants
    8
    0
    No statistical analyses for this end point

    Secondary: Platelet Count ≥ 30,000/μL and ≥ 20,000/μL Above Baseline in Subjects With Baseline Platelet Count of <15,000/μL at Week 24.

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    End point title
    Platelet Count ≥ 30,000/μL and ≥ 20,000/μL Above Baseline in Subjects With Baseline Platelet Count of <15,000/μL at Week 24.
    End point description
    Number of subjects with baseline platelet count <15,000/μL who showed platelet count increase to ≥30,000/μL and ≥20,000/μL from baseline count at Week 24.
    End point type
    Secondary
    End point timeframe
    Baseline to Week 24
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    25
    12
    Units: no. of participants
    4
    0
    No statistical analyses for this end point

    Secondary: Mean of the ITP Bleeding Score (IBLS)

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    End point title
    Mean of the ITP Bleeding Score (IBLS)
    End point description
    The ITP Bleeding Scale (IBLS) is an immune thrombocytopenic purpura (ITP)-specific bleeding score used to analyze the correlation of clinical and laboratory platelet variables with bleeding. The IBLS comprises of 11 grades from 0 (none) to 2 (marked bleeding) by history over the previous week or by exam; 2 being worse. These 11 grades include: skin by physical exam, oral by physical exam, skin by history, oral by history, epistaxis, gastrointestinal, urinary, gynecological, pulmonary, intracranial hemorrhage, and subconjunctival hemorrhage. After each grade is scored, the mean value for all 11 grades is calculated (lowest score being 0 and highest score being 2) for each subject visit. LOCF method was used to impute any missing data. The mean of the IBLS scores across visits during the 24-week treatment period was summarized by treatment group using descriptive statistics. A 2-sided, 2-sample t-test was used to test for a difference in means between treatments for this endpoint.
    End point type
    Secondary
    End point timeframe
    Assessed over the 24-week study period
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    51
    25
    Units: scores on a scale
        arithmetic mean (standard deviation)
    0.13 ± 0.12
    0.14 ± 0.10
    Statistical analysis title
    Analysis for mean of the ITP bleeding score (IBLS)
    Comparison groups
    Fostamatinib Recipient v Placebo Recipient
    Number of subjects included in analysis
    76
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.6642 [1]
    Method
    t-test, 2-sided
    Parameter type
    Risk difference (RD)
    Point estimate
    -0.01
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -0.01
         upper limit
    0
    Notes
    [1] - P-value from a two-sided two-sample t-test, testing for a difference in means between fostamatinib and placebo.

    Secondary: Mean of World Health Organization (WHO) Bleeding Scale

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    End point title
    Mean of World Health Organization (WHO) Bleeding Scale
    End point description
    The World Health Organization (WHO) bleeding scale is a standardized grading scale created to measure the severity of bleeding. The scale is a clinical investigator-assessed five-point scale with a score range starting at the lowest 0=No bleeding, 1 = Petechiae, 2=Mild blood loss, 3=Gross blood loss, to the worse 4=Debilitating blood loss. The WHO bleeding scale is scored by history over the previous-week or by exam. After each grade is scored, the mean value is calculated (lowest score being 0 [no bleeding] to the highest score being 4 [debilitating blood loss]) for each visit. LOCF method was used to impute any missing data. The mean of the WHO bleeding scale across visits during the 24-week treatment period was summarized by treatment group using descriptive statistics. A 2-sided, 2-sample t-test was used to test for a difference in means between treatments for this endpoint.
    End point type
    Secondary
    End point timeframe
    Assessed over the 24-week study period
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    51
    25
    Units: scores on a scale
        arithmetic mean (standard deviation)
    0.61 ± 0.66
    0.46 ± 0.56
    Statistical analysis title
    Analysis for mean of WHO Bleeding Scale
    Comparison groups
    Placebo Recipient v Fostamatinib Recipient
    Number of subjects included in analysis
    76
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.3365 [2]
    Method
    t-test, 2-sided
    Parameter type
    Risk difference (RD)
    Point estimate
    0.15
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -0.2
         upper limit
    0.5
    Notes
    [2] - P-value from a two-sided two-sample t-test, testing for a difference in means between fostamatinib and placebo.

    Secondary: Platelet Count ≥ 30,000/μL and ≥ 20,000/μL Above Baseline in Subjects With Baseline Platelet Count of <15,000/μL at Week 12

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    End point title
    Platelet Count ≥ 30,000/μL and ≥ 20,000/μL Above Baseline in Subjects With Baseline Platelet Count of <15,000/μL at Week 12
    End point description
    Number of subjects with baseline platelet count <15,000/μL who showed platelet count increase to ≥30,000/μL and ≥20,000/μL from baseline count at Week 12.
    End point type
    Secondary
    End point timeframe
    Baseline to Week 12
    End point values
    Fostamatinib Recipient Placebo Recipient
    Number of subjects analysed
    25
    12
    Units: no. of participants
    4
    0
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    24 Weeks
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    18.1
    Reporting groups
    Reporting group title
    Fostamatinib Recipient
    Reporting group description
    -

    Reporting group title
    Placebo Recipient
    Reporting group description
    -

    Serious adverse events
    Fostamatinib Recipient Placebo Recipient
    Total subjects affected by serious adverse events
         subjects affected / exposed
    8 / 51 (15.69%)
    5 / 25 (20.00%)
         number of deaths (all causes)
    0
    1
         number of deaths resulting from adverse events
    0
    1
    Cardiac disorders
    Cardiac failure congestive
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nervous system disorders
    Syncope
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Blood and lymphatic system disorders
    Anaemia
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    2 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Febrile neutropenia
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    1 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Immune Thrombocytopenic Purpura
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Thrombocytopenia
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Eye disorders
    Retinal tear
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    1 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal haemorrhage
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Reproductive system and breast disorders
    Menorrhagia
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Vaginal haemorrhage
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Chronic obstructive pulmonary disease
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Epistaxis
         subjects affected / exposed
    1 / 51 (1.96%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Infections and infestations
    Pneumonia
         subjects affected / exposed
    1 / 51 (1.96%)
    0 / 25 (0.00%)
         occurrences causally related to treatment / all
    1 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Sepsis
         subjects affected / exposed
    0 / 51 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 1
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Fostamatinib Recipient Placebo Recipient
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    49 / 51 (96.08%)
    19 / 25 (76.00%)
    Investigations
    Alanine aminotransferase increased
         subjects affected / exposed
    9 / 51 (17.65%)
    0 / 25 (0.00%)
         occurrences all number
    11
    0
    Aspartate aminotransferase increased
         subjects affected / exposed
    8 / 51 (15.69%)
    0 / 25 (0.00%)
         occurrences all number
    10
    0
    Blood pressure increased
         subjects affected / exposed
    3 / 51 (5.88%)
    1 / 25 (4.00%)
         occurrences all number
    3
    1
    Injury, poisoning and procedural complications
    Contusion
         subjects affected / exposed
    3 / 51 (5.88%)
    0 / 25 (0.00%)
         occurrences all number
    3
    0
    Vascular disorders
    Hypertension
         subjects affected / exposed
    13 / 51 (25.49%)
    1 / 25 (4.00%)
         occurrences all number
    16
    1
    Rash
         subjects affected / exposed
    4 / 51 (7.84%)
    0 / 25 (0.00%)
         occurrences all number
    5
    0
    Nervous system disorders
    Headache
         subjects affected / exposed
    7 / 51 (13.73%)
    6 / 25 (24.00%)
         occurrences all number
    8
    7
    Dizziness
         subjects affected / exposed
    9 / 51 (17.65%)
    4 / 25 (16.00%)
         occurrences all number
    10
    6
    Dysgeusia
         subjects affected / exposed
    4 / 51 (7.84%)
    0 / 25 (0.00%)
         occurrences all number
    5
    0
    Blood and lymphatic system disorders
    Anaemia
         subjects affected / exposed
    2 / 51 (3.92%)
    2 / 25 (8.00%)
         occurrences all number
    2
    3
    General disorders and administration site conditions
    Fatigue
         subjects affected / exposed
    6 / 51 (11.76%)
    1 / 25 (4.00%)
         occurrences all number
    8
    2
    Pyrexia
         subjects affected / exposed
    2 / 51 (3.92%)
    2 / 25 (8.00%)
         occurrences all number
    2
    2
    Chest pain
         subjects affected / exposed
    4 / 51 (7.84%)
    1 / 25 (4.00%)
         occurrences all number
    4
    1
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    21 / 51 (41.18%)
    4 / 25 (16.00%)
         occurrences all number
    35
    5
    Nausea
         subjects affected / exposed
    15 / 51 (29.41%)
    1 / 25 (4.00%)
         occurrences all number
    17
    2
    Constipation
         subjects affected / exposed
    3 / 51 (5.88%)
    1 / 25 (4.00%)
         occurrences all number
    3
    1
    Abdominal pain
         subjects affected / exposed
    3 / 51 (5.88%)
    0 / 25 (0.00%)
         occurrences all number
    5
    0
    Flatulence
         subjects affected / exposed
    3 / 51 (5.88%)
    0 / 25 (0.00%)
         occurrences all number
    3
    0
    Vomiting
         subjects affected / exposed
    2 / 51 (3.92%)
    2 / 25 (8.00%)
         occurrences all number
    2
    2
    Rectal haemorrhage
         subjects affected / exposed
    0 / 51 (0.00%)
    2 / 25 (8.00%)
         occurrences all number
    0
    2
    Respiratory, thoracic and mediastinal disorders
    Epistaxis
         subjects affected / exposed
    9 / 51 (17.65%)
    4 / 25 (16.00%)
         occurrences all number
    15
    7
    Dyspnoea
         subjects affected / exposed
    3 / 51 (5.88%)
    3 / 25 (12.00%)
         occurrences all number
    3
    5
    Oropharyngeal pain
         subjects affected / exposed
    1 / 51 (1.96%)
    2 / 25 (8.00%)
         occurrences all number
    1
    2
    Musculoskeletal and connective tissue disorders
    Musculoskeletal pain
         subjects affected / exposed
    0 / 51 (0.00%)
    2 / 25 (8.00%)
         occurrences all number
    0
    2
    Infections and infestations
    Upper respiratory tract infection
         subjects affected / exposed
    5 / 51 (9.80%)
    1 / 25 (4.00%)
         occurrences all number
    8
    1
    Urinary tract infection
         subjects affected / exposed
    3 / 51 (5.88%)
    0 / 25 (0.00%)
         occurrences all number
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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    08 Apr 2014
    Notable changes made between Version 1.0 (16Dec2013) and Version 2.0 (08Apr2014) of the protocol were as follows: • Inclusion criterion #2 has been revised to clarify the amount of time a subject who is participating in the study must have had a diagnosis of ITP prior to being randomized. • Exclusion criterion #6 has been revised and #7 has been added in an effort to exclude only subjects at significant risk of deep vein thrombosis (DVT). Thus, the timeframe has been shortened to thrombosis within the 6 months prior to randomization and, for subjects who have a more distant history of DVT, results of a D-dimer test must be within the normal range as a measure of low risk for DVT recurrence. • Exclusion criterion #8 has been revised to specify that the IBLS score cannot be greater than 2 at any of the 11 sites evaluated. • D-dimer testing has been added to Screening Visit A (V1). D-dimer test should be performed at the local lab and is only required for subjects who have a history of DVT greater than 6 months prior to randomization. • An ECG has been added to the Visit 15 assessment for subjects going onto the extension study. • To assure that subjects sign an ICF prior to any study related procedures, text was added to clarify that subjects who require a washout period greater than 30 days should sign the ICF at a prescreening visit prior to beginning washout. • When Visit 2 and Visit 3 occur on the same day, following clarification added: Visit 3 SF-36 assessment will be administered after Visit 2 assessments are complete. • Section 7.4.2: subjects who have a dose reduction due to adverse events may be allowed to have their dose reescalated after the adverse event has resolved following consultation with the Medical Monitor (if clinical benefit of study drug is shown). • Measurement of IgD and IgE levels has been removed from the protocol. • The D-dimer test was added to the list of laboratory tests that will be performed during the study.
    21 Nov 2014
    Notable changes made between Version 2.0 (08Apr2014) and Version 3.0 (21Nov2014) of the protocol were as follows: • Inclusion criterion #4 was revised to clarify a typical treatment regimen for ITP (Master protocol and 3 country-specific protocols). • Exclusion criterion #18 was added to exclude subjects who had major surgery within 28 days prior to randomization. • Prior ITP treatments were defined as including therapies granted market authorization, and examples of typical prior ITP treatments were provided. Washout requirements were revised to clarify that subjects must discontinue all therapeutic agents other than those allowed as concomitant ITP therapy.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported
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