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    Clinical Trial Results:
    A Non-Controlled, Open-Label, Multicenter, Study of Immune Tolerance Induction Performed with rFVIIIFc within a Timeframe of 60 Weeks in Severe Haemophilia A Patients with Inhibitors who have Failed Previous Immune Tolerance Induction Therapies

    Summary
    EudraCT number
    2017-000065-73
    Trial protocol
    DE   IE   GB   BE   FR   SE   SI   IT  
    Global end of trial date
    31 Aug 2020

    Results information
    Results version number
    v1(current)
    This version publication date
    12 Mar 2021
    First version publication date
    12 Mar 2021
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    Sobi.Elocta-003
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT03103542
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Swedish Orphan Biovitrum AB
    Sponsor organisation address
    Tomtebodavägen 23A, Solna, Stockholm, Sweden, 11276
    Public contact
    Medical Information, Swedish Orphan Biovitrum AB , +468 6972000, medical.info@sobi.com
    Scientific contact
    Medical Information, Swedish Orphan Biovitrum AB , +468 6972000, medical.info@sobi.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?
    Yes
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    23 Oct 2020
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    04 Sep 2019
    Global end of trial reached?
    Yes
    Global end of trial date
    31 Aug 2020
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To describe the outcome of ITI treatment performed with rFVIIIFc within a timeframe of 60 weeks in patients who failed previous attempts at tolerization including use of immunosuppressants
    Protection of trial subjects
    This study was conducted in compliance with the protocol, the International Conference on Harmonization (ICH) Guideline for Good Clinical Practice (GCP), applicable regulatory requirements, and in accordance with the latest revision of the Ethical Principles for Medical Research Involving Human Subjects (the Declaration of Helsinki). The volume of blood taken from the patients complied with the European Commission guidance,the protocol states that the study-related blood loss should not exceed 3% of the total blood volume during a period of 4 weeks and should not exceed 1% at any single time. Local and/or regional guidelines regarding blood draw volumes were also considered.
    Background therapy
    None
    Evidence for comparator
    NA
    Actual start date of recruitment
    17 Oct 2017
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    No
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Canada: 3
    Country: Number of subjects enrolled
    United States: 1
    Country: Number of subjects enrolled
    Slovenia: 1
    Country: Number of subjects enrolled
    Sweden: 1
    Country: Number of subjects enrolled
    United Kingdom: 3
    Country: Number of subjects enrolled
    Germany: 4
    Country: Number of subjects enrolled
    Ireland: 3
    Worldwide total number of subjects
    16
    EEA total number of subjects
    9
    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)
    11
    Adolescents (12-17 years)
    4
    Adults (18-64 years)
    1
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Recruitment was open at 18 sites in 9 countries in Northern America and Europe. 11 sites in 7 countries recruited patients. It was initially planned to enroll 20 patients but due to recruitment challenges and a changing treatment landscape the recruitment was stopped after enrolling 16 patients. Recruitment was open from Aug 2017 to Nov 2019.

    Pre-assignment
    Screening details
    After informed consent was provided, patients underwent study specific screening procedures. During the 4- to 6-week screening period, patients continued with their usual treatment regimen in accordance with the local standard of care. Patients who met all inclusion and no exclusion criteria specified by the protocol were enrolled into the study.

    Pre-assignment period milestones
    Number of subjects started
    18 [1]
    Number of subjects completed
    16

    Pre-assignment subject non-completion reasons
    Reason: Number of subjects
    Screening Failure: 2
    Notes
    [1] - The number of subjects reported to have started the pre-assignment period are not the same as the worldwide number enrolled in the trial. It is expected that these numbers will be the same.
    Justification: 18 patients entered the screening period for the study although only 16 of these were eventually enrolled.
    Period 1
    Period 1 title
    Overall (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Not applicable
    Blinding used
    Not blinded

    Arms
    Arm title
    rFVIIIFc
    Arm description
    All enrolled 16 patients
    Arm type
    Experimental

    Investigational medicinal product name
    rFVIIIFc
    Investigational medicinal product code
    EMEA/H/C/003964
    Other name
    Elocta, Eloctate
    Pharmaceutical forms
    Powder and solvent for solution for injection
    Routes of administration
    Intravenous use
    Dosage and administration details
    During the ITI period the initial rFVIIIFc dose administered was 200 IU/kg/day, which could be given as once daily, or divided in two doses per day. If FVIII:C levels rose above 200 IU/dL already at a low-titer inhibitor (< 5 BU/mL), and before all three tolerance criteria had been confirmed, the dose were to be decreased according to investigator judgment to maintain the peak FVIII:C levels between 100-200 IU/dL. During the initial part of the tapering period the rFVIIIFc dose administered were to be adjusted according to investigator judgment based on the FVIII:C results to maintain the peak FVIII:C levels between 100-200 IU/dL, with an aim to taper the FVIII:C levels to reach prophylactic levels as judged by the investigator after 16 weeks. During the follow-up period, the prophylaxis regimen were to be adjusted based on clinical response, and with an aim to keep FVIII:C levels ≥ 1 IU/dL at all time points according to investigator judgment and local practice.

    Number of subjects in period 1
    rFVIIIFc
    Started
    16
    Completed
    9
    Not completed
    7
         Physician decision
    2
         Consent withdrawn by subject
    1
         Adverse event, non-fatal
    2
         Unspecified
    2

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Overall
    Reporting group description
    -

    Reporting group values
    Overall Total
    Number of subjects
    16 16
    Age categorical
    Age at baseline
    Units: Subjects
        Children (2-11 years)
    11 11
        Adolescents (12-17 years)
    4 4
        Adults (18-64 years)
    1 1
    Age continuous
    Age at baseline
    Units: years
        median (full range (min-max))
    7.5 (3 to 46) -
    Gender categorical
    Gender
    Units: Subjects
        Female
    0 0
        Male
    16 16
    Demography - Race
    Units: Subjects
        White
    15 15
        Asian
    0 0
        Black or African American
    1 1
        American Indian or Alaska Native
    0 0
    Hemophilia history - severity
    Units: Subjects
        Mild
    0 0
        Moderate
    0 0
        Severe
    16 16
    Hemophilia history - Family history of Inhibitors
    Units: Subjects
        Yes
    7 7
        No
    5 5
        Unknown
    4 4
    Number of previous ITI Treatments
    Units: Subjects
        1 Treatment
    10 10
        2 Treatments
    4 4
        3 Treatments
    2 2
    Inhibitor History - Historical Peak Titre Level
    Units: BU/ml
        median (full range (min-max))
    127.4 (8 to 3000) -
    Inhibitor history - Age at Inhibitor development
    Units: years
        arithmetic mean (standard deviation)
    1.9 ± 3.6 -

    End points

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    End points reporting groups
    Reporting group title
    rFVIIIFc
    Reporting group description
    All enrolled 16 patients

    Primary: ITI success

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    End point title
    ITI success [1]
    End point description
    ITI success, defined as achieving all 3 of the following criteria: • Negative titer for inhibitor (<0.6 BU/mL by the Nijmegen-modified Bethesda assay) at 2 consecutive visits • FVIII incremental recovery (IR) >66% of the expected IR at 2 consecutive visits • FVIII half-life (t½) ≥7 hours
    End point type
    Primary
    End point timeframe
    60 weeks
    Notes
    [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: This is an observational study presenting results using descriptive statistics
    End point values
    rFVIIIFc
    Number of subjects analysed
    16
    Units: Subjects
        ITI Success
    1
        Partial Success
    2
        ITI failure
    6
        Not determinable due to withdrawal during the ITI
    7
    No statistical analyses for this end point

    Secondary: Time to ITI success

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    End point title
    Time to ITI success
    End point description
    Time to tolerization (i.e. ITI success) of ITI performed with rFVIIIFc within a timeframe of 60 weeks in patients who failed previous attempts at tolerization including use of immunosuppressants. For the subset of patients who were classified as partial success at the end of the ITI period, the time to fulfillment of the criteria for partial success was also analyzed descriptively.
    End point type
    Secondary
    End point timeframe
    60 weeks
    End point values
    rFVIIIFc
    Number of subjects analysed
    3
    Units: weeks
    arithmetic mean (standard deviation)
        Time to ITI Success
    46.71 ± 0
        Time to Partial Success
    38.76 ± 15.05
    No statistical analyses for this end point

    Secondary: Occurrence of relapse during a 48-week period following successful ITI treatment

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    End point title
    Occurrence of relapse during a 48-week period following successful ITI treatment
    End point description
    Relapse was defined as a positive inhibitor (≥0.6 BU/mL) on 2 consecutive assessments and incremental recovery ≤66 % of the expected incremental recovery on 2 consecutive assessments.
    End point type
    Secondary
    End point timeframe
    48 weeks
    End point values
    rFVIIIFc
    Number of subjects analysed
    1
    Units: subjects
        relaps criteria met
    0
    No statistical analyses for this end point

    Secondary: Adverse Events

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    End point title
    Adverse Events
    End point description
    All observed adverse events. (AE=adverse event, SAE=serious adverse event, TEAE=treatment emergent adverse event)
    End point type
    Secondary
    End point timeframe
    SAEs - approx 166 weeks AEs - approx 110 weeks
    End point values
    rFVIIIFc
    Number of subjects analysed
    16
    Units: Number of events
        TEAEs
    188
        Serious AEs
    21
        Serious TEAEs
    18
        Non-serious TEAEs
    170
        Related TEAEs
    2
        Mild AEs
    145
        Moderate AEs
    42
        Severe AEs
    4
        AEs Leading to Withdrawal
    3
        AEs Leading to Death
    0
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    SAEs: From signature of the informed consent form to the safety follow-up visit (approximately 116 weeks). Non-serious AEs: From the time of first dose of IMP to the safety follow-up visit (approximately 110 weeks).
    Adverse event reporting additional description
    The investigator were to report all directly observed adverse events, and all adverse events spontaneously reported by the patient. In addition, each patient were to be questioned about AEs at each study visit.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    22
    Reporting groups
    Reporting group title
    Overall
    Reporting group description
    AEs are reported on overall level. Please note the difference in the reporting period of SAEs and non-serious AEs (SAEs also collected during screening period). 18 patients entered screening, 16 patients were eventually enrolled and are included in the analysis. 188 TEAEs (18 serious; 170 non-serious) were reported in all 16 patients. 3 SAEs occurred during the screening period (PTs Tonsillitis, Vascular device infection and Hemarthrosis). 2 SAEs (PTs Brachiocephalic vein thrombosis and Vena cava thrombosis) were considered related to ITI treatment. 3 SAEs in 2 patients (PTs Device related infection, Haemorrhage and Haemarthrosis) led to withdrawal. The most frequently reported AE was Infections and infestations (42 events in 11 patients), followed by Injury, poisoning and procedural complications (28 events in 7 patients), Musculoskeletal and connective tissue disorders (28 events in 11 patients) and Gastrointestinal disorders (15 events in 8 patient).

    Serious adverse events
    Overall
    Total subjects affected by serious adverse events
         subjects affected / exposed
    7 / 16 (43.75%)
         number of deaths (all causes)
    0
         number of deaths resulting from adverse events
    0
    Vascular disorders
    Brachiocephalic vein thrombosis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Vena cava thrombosis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Thrombosis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Nervous system disorders
    Headache
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Blood and lymphatic system disorders
    Immune thrombocytopenic purpura
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Spontaneous haemorrhage
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Renal and urinary disorders
    Haematuria
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Musculoskeletal and connective tissue disorders
    Haemarthrosis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Infections and infestations
    Tonsillitis
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences causally related to treatment / all
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    Vascular device infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Device related infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 5
         deaths causally related to treatment / all
    0 / 0
    Device related sepsis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Staphylococcal infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Product issues
    Thrombosis in device
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 0%
    Non-serious adverse events
    Overall
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    16 / 16 (100.00%)
    Vascular disorders
    Haemorrhage
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    General disorders and administration site conditions
    Catheter site irritation
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Gait disturbance
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Influenza like illness
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Peripheral swelling
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    4
    pyrexia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Immune system disorders
    Seasonal allergy
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    4 / 16 (25.00%)
         occurrences all number
    4
    Epistaxis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Oropharyngeal pain
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Rhinorrhoea
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Psychiatric disorders
    Anxiety
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Autism spectrum disorder
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Product issues
    Thrombosis in device
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Device damage
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Investigations
    Activated partial thromboplastin time prolonged
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Blood alkaline phosphatase increased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Blood urine present
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Haematocrit decreased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Haemoglobin decreased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Human rhinovirus test positive
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Protein urine present
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Red blood cell count decreased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Tri-iodothyronine free increased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Urine ketone body present
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    White blood cell count decreased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Injury, poisoning and procedural complications
    Arthropod bite
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Contusion
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    15
    Fall
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    4
    Skin abrasion
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Skin laceration
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Thermal burn
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Tongue injury
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Traumatic haematoma
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Traumatic haemorrhage
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Nervous system disorders
    Dizziness
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Headache
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    7
    Jugular vein occlusion
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Migraine
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Blood and lymphatic system disorders
    Anaemia
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Iron deficiency anaemia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Lymphadenopathy
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Spontaneous haemorrhage
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Ear and labyrinth disorders
    Ear pain
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Eye disorders
    Visual impairment
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Gastrointestinal disorders
    Abdominal pain
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Abdominal pain lower
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Abdominal pain upper
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Anal incontinence
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Constipation
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Diarrhoea
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Lip ulceration
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Loose tooth
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Mouth ulceration
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Tooth development disorder
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Vomiting
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    3
    Skin and subcutaneous tissue disorders
    Acne
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Dermatitis contact
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Eczema
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    3
    Onychomadesis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Petechiae
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Red man syndrome
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Renal and urinary disorders
    Haematuria
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Proteinuria
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    9
    Arthropathy
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    3
    Back pain
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Growing pains
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Haemarthrosis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Joint swelling
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Mobility decreased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Musculoskeletal chest pain
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    3
    Pain in extremity
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    4
    Posture abnormal
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Soft tissue swelling
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Infections and infestations
    Adenovirus infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Conjunctivitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Fungal skin infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Gastroenteritis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Gastrointestinal infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Impetigo
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Influenza
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Nasopharyngitis
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    10
    Rhinitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Tinea infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Upper respiratory tract infection
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    4
    Varicella
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Viral infection
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    5
    Viral upper respiratory tract infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Metabolism and nutrition disorders
    Vitamin D deficiency
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    26 Feb 2018
    • to consolidate the feedback received from various regulatory authorities and ethics committees • to decrease the patient burden (for examples changes in the PK samplings schedule, visit schedule and the possibility of home visits and study medication home deliveries) • to adjust the definition of relapse to be more in line with clinical praxis and increase patient retention • to clarify the instructions for concomitant use of bypassing agents • add emicizumab as an exclusion criterion/criterion for withdrawal • to facilitate reading and avoid misinterpretation

    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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