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    Clinical Trial Results:
    Open-Label, Multiple-Dose, Efficacy, Safety, and Tolerability Study of Eteplirsen in Subjects with Duchenne Muscular Dystrophy who Participated in Study 4658-us-201

    Summary
    EudraCT number
    2016-005001-39
    Trial protocol
    Outside EU/EEA  
    Global end of trial date
    16 Aug 2017

    Results information
    Results version number
    v1(current)
    This version publication date
    08 Sep 2019
    First version publication date
    08 Sep 2019
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    4658-us-202
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT01540409
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Sarepta Therapeutics Inc.
    Sponsor organisation address
    215 First Street, Cambridge, United States, MA 02142
    Public contact
    Medical Director, Sarepta Therapeutics, Inc., +1 888-727-3782, clinicaltrials@sarepta.com
    Scientific contact
    Medical Director, Sarepta Therapeutics, Inc., +1 888-727-3782, clinicaltrials@sarepta.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    Yes
    EMA paediatric investigation plan number(s)
    EMEA-001722-PIP01-14
    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
    16 Aug 2017
    Is this the analysis of the primary completion data?
    No
    Global end of trial reached?
    Yes
    Global end of trial date
    16 Aug 2017
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective of this study was to assess the efficacy, safety, and tolerability of treatment with eteplirsen in Duchenne muscular dystrophy (DMD) subjects who have successfully completed Study 4658-us-201.
    Protection of trial subjects
    Written informed consent from each patient or patient’s parent(s) or legal guardian(s), if applicable, and written assent from each patient, if applicable, were obtained before any study-specific screening or baseline period evaluations were performed. The anonymity of participating patients will be maintained to the extent required by applicable laws and in accordance with current HIPAA standards. This study was designed and monitored in accordance with Sponsor procedures, which complied with the ethical principles of Good Clinical Practice (GCP) as required by the major regulatory authorities, and in accordance with the Declaration of Helsinki.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    27 Feb 2012
    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
    United States: 12
    Worldwide total number of subjects
    12
    EEA total number of subjects
    0
    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)
    12
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    0
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    The study was conducted at 12 centers in the United States. Overall, 12 subjects who completed parent study 4658-us-201 (NCT01396239) were enrolled between July 2011 and February 2012 in this extension study (4658-us-202; NCT01540409). A 4-week open label period (Week 24-28) was observed between the parent and extension study.

    Pre-assignment
    Screening details
    Subjects who received placebo in 4658-us-201 study were randomized in 1:1 ratio in this extension study to receive either eteplirsen 30 or 50 milligram per kilogram (mg/kg) and, those who received eteplirsen 30 or 50 mg/kg in 4658-us-201 received same treatment in this extension study.

    Period 1
    Period 1 title
    Overall Study (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Not applicable
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Eteplirsen 30 mg/kg
    Arm description
    Subjects who received 30 mg/kg eteplirsen or placebo once weekly, intravenous (IV) infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 30 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.
    Arm type
    Experimental

    Investigational medicinal product name
    Eteplirsen
    Investigational medicinal product code
    AVI-4658
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Subjects received 30 mg/kg eteplirsen IV infusion once weekly.

    Arm title
    Eteplirsen 50 mg/kg
    Arm description
    Subjects who received 50 mg/kg eteplirsen or placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 50 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.
    Arm type
    Experimental

    Investigational medicinal product name
    Eteplirsen
    Investigational medicinal product code
    AVI-4658
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Subjects received 50 mg/kg eteplirsen IV infusion once weekly.

    Number of subjects in period 1
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg
    Started
    6
    6
    Completed
    6
    6

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Eteplirsen 30 mg/kg
    Reporting group description
    Subjects who received 30 mg/kg eteplirsen or placebo once weekly, intravenous (IV) infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 30 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Reporting group title
    Eteplirsen 50 mg/kg
    Reporting group description
    Subjects who received 50 mg/kg eteplirsen or placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 50 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Reporting group values
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg Total
    Number of subjects
    6 6 12
    Age categorical
    Units: Subjects
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    9.2 ( 0.75 ) 8.8 ( 1.47 ) -
    Gender categorical
    Units: Subjects
        Female
    0 0 0
        Male
    6 6 12
    Region of Enrollment
    Units: Subjects
        United States
    6 6 12

    End points

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    End points reporting groups
    Reporting group title
    Eteplirsen 30 mg/kg
    Reporting group description
    Subjects who received 30 mg/kg eteplirsen or placebo once weekly, intravenous (IV) infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 30 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Reporting group title
    Eteplirsen 50 mg/kg
    Reporting group description
    Subjects who received 50 mg/kg eteplirsen or placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 50 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Subject analysis set title
    Placebo to Eteplirsen
    Subject analysis set type
    Intention-to-treat
    Subject analysis set description
    Subjects who received eteplirsen matched placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), followed by 30 or 50 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Subject analysis set title
    Eteplirsen-Treated Subjects
    Subject analysis set type
    Full analysis
    Subject analysis set description
    All subjects who received eteplirsen treatment in the parent study 4658-us-201 (NCT01396239) and in this extension study.

    Primary: Change From Baseline in the 6 Minute Walk Test (6MWT) at Week 240

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    End point title
    Change From Baseline in the 6 Minute Walk Test (6MWT) at Week 240 [1]
    End point description
    This study used a modified version of the 6MWT test procedure described in American Thoracic Society (ATS) 2002 guidelines, specifically adapted for patients with DMD. The subject was asked to walk a set course of 25 meters for 6 minutes (timed) and the distance walked in meters was recorded. Increases from baseline in 6MWT distance are indicative of improvement and decreases from baseline indicate worsening. Baseline here corresponds to the baseline in the parent study (4658-us-201, NCT01396239). The Intent-to-Treat Population (ITT) population included all subjects randomized into parent study 4658-us-201. Here, “Number of Subjects analysed” signifies subjects evaluable for this endpoint. Results are reported below in 2 reporting groups based on evaluation period (Week 240) as applicable for this endpoint.
    End point type
    Primary
    End point timeframe
    Parent Baseline and Week 240
    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: Summaries were descriptive and no formal statistical tests were done.
    End point values
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg
    Number of subjects analysed
    4
    3
    Units: Meters
        arithmetic mean (standard deviation)
    -199.0 ( 113.25 )
    -258.0 ( 175.65 )
    No statistical analyses for this end point

    Primary: Change From Baseline in the Percentage of Dystrophin Positive Fibers (PDPF) at Week 48

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    End point title
    Change From Baseline in the Percentage of Dystrophin Positive Fibers (PDPF) at Week 48 [2]
    End point description
    Dystrophin expression as assessed by percent dystrophin positive fibers was measured by immunohistochemistry (IHC) technique using primary anti-dystrophin antibody. Percent change from baseline is the arithmetic difference of the treatment time point minus baseline divided by baseline calculated for individual subjects. Baseline here corresponds to the baseline in the parent study (4658-us-201, NCT01396239). The ITT population included all subjects randomized into parent study 4658-us-201. Results are reported below in 3 reporting groups of placebo to eteplirsen, eteplirsen 30 mg/kg, eteplirsen 50 mg/kg, respectively, based on evaluation period (Week 48) as applicable for this endpoint.
    End point type
    Primary
    End point timeframe
    Parent Baseline and Week 48
    Notes
    [2] - 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: Summaries were descriptive and no formal statistical tests were done.
    End point values
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg Placebo to Eteplirsen
    Number of subjects analysed
    4
    4
    4
    Units: Percentage Fibers
        arithmetic mean (standard deviation)
    51.69 ( 7.089 )
    42.93 ( 13.433 )
    37.70 ( 12.602 )
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Parent Baseline up to 240 weeks (cumulative Study 4658-us-201 + 4658-us-202)
    Adverse event reporting additional description
    Only treatment-emergent adverse events with an onset data on or after the date of first dose of study drug were reported. Relatedness of serious adverse events to study medication was determined by the Investigator.
    Assessment type
    Non-systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    14.0
    Reporting groups
    Reporting group title
    Eteplirsen 30 mg/kg
    Reporting group description
    Subjects who received 30 mg/kg eteplirsen or placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 30 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Reporting group title
    Eteplirsen 50 mg/kg
    Reporting group description
    Subjects who received 50 mg/kg eteplirsen or placebo once weekly, IV infusion for 24 weeks in the parent study 4658-us-201 (NCT01396239), continued the same treatment with 50 mg/kg eteplirsen once weekly for 212 weeks (up to Week 240) in this extension study.

    Serious adverse events
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg
    Total subjects affected by serious adverse events
         subjects affected / exposed
    4 / 6 (66.67%)
    2 / 6 (33.33%)
         number of deaths (all causes)
    0
    0
         number of deaths resulting from adverse events
    0
    0
    Injury, poisoning and procedural complications
    Tibia fracture
    Additional description: Not related to study medication. All events are related to patients falling.
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Femur Fracture
    Additional description: Not related to study medication. All events are related to patients falling.
    alternative dictionary used: MedDRA 14.0
         subjects affected / exposed
    3 / 6 (50.00%)
    1 / 6 (16.67%)
         occurrences causally related to treatment / all
    0 / 3
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Acute respiratory failure
    Additional description: Not related to study medication.
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Musculoskeletal and connective tissue disorders
    Scoliosis
    Additional description: Not related to study medication.
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Eteplirsen 30 mg/kg Eteplirsen 50 mg/kg
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    6 / 6 (100.00%)
    6 / 6 (100.00%)
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Skin papilloma
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Vascular disorders
    Haematoma
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Flushing
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    3
    2
    Catheter site pain
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    3
    Infusion site extravasation
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    2
    Device occlusion
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Infusion site haematoma
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Oedema peripheral
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    7
    0
    Thrombosis in device
         subjects affected / exposed
    2 / 6 (33.33%)
    1 / 6 (16.67%)
         occurrences all number
    3
    1
    Application site erythema
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Application site pruritus
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Catheter site haematoma
         subjects affected / exposed
    0 / 6 (0.00%)
    2 / 6 (33.33%)
         occurrences all number
    0
    3
    Catheter site haemorrhage
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Catheter site inflammation
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Catheter site related reaction
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Chest pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Influenza like illness
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Infusion site pain
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Infusion site rash
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Injection site pain
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Irritability
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Malaise
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Non-cardiac chest pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Pain
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    2
    Swelling
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Disease progression
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Infusion site urticaria
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Immune system disorders
    Hypersensitivity
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Seasonal allergy
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Reproductive system and breast disorders
    Pelvic pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Testicular pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Respiratory, thoracic and mediastinal disorders
    Oropharyngeal pain
         subjects affected / exposed
    4 / 6 (66.67%)
    4 / 6 (66.67%)
         occurrences all number
    5
    15
    Nasal congestion
         subjects affected / exposed
    5 / 6 (83.33%)
    2 / 6 (33.33%)
         occurrences all number
    11
    3
    Cough
         subjects affected / exposed
    2 / 6 (33.33%)
    4 / 6 (66.67%)
         occurrences all number
    2
    12
    Epistaxis
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    4
    Pharyngeal erythema
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Rhinorrhoea
         subjects affected / exposed
    0 / 6 (0.00%)
    3 / 6 (50.00%)
         occurrences all number
    0
    6
    Sleep apnoea syndrome
         subjects affected / exposed
    3 / 6 (50.00%)
    0 / 6 (0.00%)
         occurrences all number
    3
    0
    Upper respiratory tract congestion
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Productive cough
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Respiratory disorder
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Sinus congestion
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Sneezing
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Upper-airway cough syndrome
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Psychiatric disorders
    Anxiety disorder
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Insomnia
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Agitation
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Investigations
    Activated partial thromboplastin time prolonged
         subjects affected / exposed
    0 / 6 (0.00%)
    4 / 6 (66.67%)
         occurrences all number
    0
    4
    C-reactive protein increased
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    4
    2
    Blood glucose increased
         subjects affected / exposed
    2 / 6 (33.33%)
    1 / 6 (16.67%)
         occurrences all number
    3
    1
    Blood creatine phosphokinase increased
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Body height below normal
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Activated partial thromboplastin time abnormal
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Blood creatinine increased
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Blood urea increased
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Lymphocyte count decreased
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Neutrophil count increased
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    3
    Red blood cells urine positive
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    White blood cell count decreased
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Wound healing normal
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Injury, poisoning and procedural complications
    Procedural pain
         subjects affected / exposed
    5 / 6 (83.33%)
    6 / 6 (100.00%)
         occurrences all number
    8
    11
    Contusion
         subjects affected / exposed
    4 / 6 (66.67%)
    4 / 6 (66.67%)
         occurrences all number
    9
    12
    Arthropod bite
         subjects affected / exposed
    3 / 6 (50.00%)
    2 / 6 (33.33%)
         occurrences all number
    4
    2
    Excoriation
         subjects affected / exposed
    2 / 6 (33.33%)
    3 / 6 (50.00%)
         occurrences all number
    2
    11
    Joint injury
         subjects affected / exposed
    2 / 6 (33.33%)
    1 / 6 (16.67%)
         occurrences all number
    2
    1
    Joint sprain
         subjects affected / exposed
    0 / 6 (0.00%)
    3 / 6 (50.00%)
         occurrences all number
    0
    3
    Muscle strain
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    2
    Fall
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Foot fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Incision site haemorrhage
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Incision site pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Arthropod sting
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Back injury
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Burns first degree
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Cardiac function disturbance postoperative
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Compression fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Concussion
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Head injury
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Laceration
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Limb injury
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Lip injury
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Lower limb fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Nail injury
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Post procedural haematoma
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Postoperative respiratory distress
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Radius fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Sunburn
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Thermal burn
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Tibia fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Humerus fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Scratch
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Torus fracture
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Ulna fracture
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Congenital, familial and genetic disorders
    Cryptorchism
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Cardiac disorders
    Tachycardia
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    3
    0
    Nervous system disorders
    Headache
         subjects affected / exposed
    4 / 6 (66.67%)
    5 / 6 (83.33%)
         occurrences all number
    31
    12
    Balance disorder
         subjects affected / exposed
    2 / 6 (33.33%)
    3 / 6 (50.00%)
         occurrences all number
    2
    3
    Dizziness
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Psychomotor hyperactivity
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Sinus headache
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Somnolence
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Syncope
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Blood and lymphatic system disorders
    Anaemia
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Ear and labyrinth disorders
    Cerumen impaction
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Motion sickness
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Tympanic membrane disorder
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Eye disorders
    Cataract
         subjects affected / exposed
    0 / 6 (0.00%)
    2 / 6 (33.33%)
         occurrences all number
    0
    2
    Cataract subcapsular
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Conjunctivitis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Erythema of eyelid
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Hypermetropia
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Gastrointestinal disorders
    Vomiting
         subjects affected / exposed
    5 / 6 (83.33%)
    4 / 6 (66.67%)
         occurrences all number
    8
    6
    Abdominal pain upper
         subjects affected / exposed
    1 / 6 (16.67%)
    3 / 6 (50.00%)
         occurrences all number
    2
    7
    Dyspepsia
         subjects affected / exposed
    3 / 6 (50.00%)
    1 / 6 (16.67%)
         occurrences all number
    3
    3
    Abdominal pain
         subjects affected / exposed
    0 / 6 (0.00%)
    2 / 6 (33.33%)
         occurrences all number
    0
    3
    Constipation
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    2
    Diarrhoea
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    7
    Nausea
         subjects affected / exposed
    2 / 6 (33.33%)
    3 / 6 (50.00%)
         occurrences all number
    2
    7
    Oral pain
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    3
    Abdominal discomfort
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    7
    1
    Dental caries
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Dysphagia
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Flatulence
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Food poisoning
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Haemorrhoids
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Lip swelling
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Retained deciduous tooth
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Tooth impacted
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Toothache
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Gastritis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Tooth disorder
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Skin and subcutaneous tissue disorders
    Dermatitis contact
         subjects affected / exposed
    2 / 6 (33.33%)
    1 / 6 (16.67%)
         occurrences all number
    2
    1
    Rash
         subjects affected / exposed
    3 / 6 (50.00%)
    1 / 6 (16.67%)
         occurrences all number
    4
    1
    Ecchymosis
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    2
    Erythema
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    3
    Papule
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    4
    1
    Alopecia
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Dermatitis bullous
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Ingrowing nail
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    2
    1
    Intertrigo
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Keloid scar
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Nail discolouration
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Nail dystrophy
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Petechiae
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Pruritus
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Rash papular
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Skin erosion
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Urticaria
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    3
    Urticaria thermal
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Renal and urinary disorders
    Proteinuria
         subjects affected / exposed
    2 / 6 (33.33%)
    4 / 6 (66.67%)
         occurrences all number
    2
    5
    Glycosuria
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Hypercalciuria
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Polyuria
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Pollakiuria
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Endocrine disorders
    Goitre
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Growth hormone deficiency
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Cushingoid
         subjects affected / exposed
    0 / 6 (0.00%)
    2 / 6 (33.33%)
         occurrences all number
    0
    2
    Musculoskeletal and connective tissue disorders
    Pain in extremity
         subjects affected / exposed
    4 / 6 (66.67%)
    4 / 6 (66.67%)
         occurrences all number
    11
    15
    Arthralgia
         subjects affected / exposed
    5 / 6 (83.33%)
    4 / 6 (66.67%)
         occurrences all number
    8
    9
    Back pain
         subjects affected / exposed
    6 / 6 (100.00%)
    3 / 6 (50.00%)
         occurrences all number
    13
    8
    Muscle spasms
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    3
    Musculoskeletal pain
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    4
    3
    Myalgia
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    2
    Muscular weakness
         subjects affected / exposed
    0 / 6 (0.00%)
    3 / 6 (50.00%)
         occurrences all number
    0
    4
    Bone pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Musculoskeletal chest pain
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Neck pain
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Scoliosis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Tendon disorder
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Tendonitis
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Foot deformity
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Infections and infestations
    Nasopharyngitis
         subjects affected / exposed
    4 / 6 (66.67%)
    5 / 6 (83.33%)
         occurrences all number
    6
    10
    Upper respiratory tract infection
         subjects affected / exposed
    2 / 6 (33.33%)
    4 / 6 (66.67%)
         occurrences all number
    9
    13
    Gastroenteritis viral
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    2
    3
    Hordeolum
         subjects affected / exposed
    0 / 6 (0.00%)
    3 / 6 (50.00%)
         occurrences all number
    0
    7
    Post procedural cellulitis
         subjects affected / exposed
    1 / 6 (16.67%)
    1 / 6 (16.67%)
         occurrences all number
    1
    1
    Rhinitis
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Viral infection
         subjects affected / exposed
    1 / 6 (16.67%)
    2 / 6 (33.33%)
         occurrences all number
    1
    2
    Candidiasis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Gastroenteritis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Incision site infection
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    2
    Pharyngitis streptococcal
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Pneumonia
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Sinusitis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Tinea capitis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Tinea pedis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Viral upper respiratory tract infection
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Influenza
         subjects affected / exposed
    0 / 6 (0.00%)
    3 / 6 (50.00%)
         occurrences all number
    0
    3
    Folliculitis
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Abscess
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Abscess limb
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Bacterial disease carrier
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Localised infection
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Paraspinal abscess
         subjects affected / exposed
    0 / 6 (0.00%)
    1 / 6 (16.67%)
         occurrences all number
    0
    1
    Pharyngitis
         subjects affected / exposed
    1 / 6 (16.67%)
    0 / 6 (0.00%)
         occurrences all number
    1
    0
    Metabolism and nutrition disorders
    Hypokalaemia
         subjects affected / exposed
    2 / 6 (33.33%)
    2 / 6 (33.33%)
         occurrences all number
    2
    2
    Dehydration
         subjects affected / exposed
    2 / 6 (33.33%)
    1 / 6 (16.67%)
         occurrences all number
    2
    1
    Obesity
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0
    Vitamin D deficiency
         subjects affected / exposed
    2 / 6 (33.33%)
    0 / 6 (0.00%)
         occurrences all number
    2
    0

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    20 Apr 2012
    Amendment 1 • Text suggesting that dosing adjustments might be made via protocol amendment was removed from the protocol as the Sponsor did not intend to change the dosing regimen. • A brief high-level summary of safety data from the recently completed parent study, Study 4658-us-201, was added. • The protocol was corrected to indicate that blood for biomarker assessments should be drawn at the satellite sites once the patient has been transferred to their satellite site. • The protocol was corrected to specify that brief physical examinations should be performed every week when the patient receives study medication. In addition, full physical examinations are performed at the central site at the times specified in the Schedule of Events. • Guidelines for the timing of drug administration, and for taking planned drug holidays to accommodate scheduling conflicts, were added to the protocol to improve the clarity of the document and provide increased convenience for the patients, respectively. • The Week 44 assessments (Week 72 for combined 201/202 studies) fell during the winter holidays, and were therefore moved to Week 46 (Week 74 for combined 201/202 studies) because it was anticipated that travel to the central site would be difficult during this time.
    04 Oct 2012
    Amendment 2 • Instructions for eteplirsen administration were clarified for consistency with the study’s Pharmacy Manual. • The option of inserting an implanted venous access port for eteplirsen administration was added.
    26 Feb 2013
    Amendment 3 • Removed the collection of blood samples for ELISPOT analyses at Weeks 56, 68, and 80 (Weeks 84, 96, and 108 for combined 201/202 studies) because no immune response has been observed in samples collected to date and all boys have been expressing dystrophin since Week 48 (Week 76 for combined 201/202 studies). • The statistical analyses were updated.
    16 May 2013
    Amendment 4 • The study was extended from 80 weeks to 164 weeks of treatment.
    03 Feb 2014
    Amendment 5 • PK sample collection was added to Week 124 assessments (Week 152 for combined 201/202 studies). • The option of receiving at-home infusions of study drug by a visiting nurse after Week 124 (Week 152 for combined 201/202 studies) was added.
    21 May 2014
    Amendment 6 • A second, optional biopsy was added at Week 132 (Week 160 for combined 201/202 studies) for patients who consent to this procedure. The purpose of this optional biopsy is gain additional data on eteplirsen-induced dystrophin expression after more than 2 years of eteplirsen treatment.
    14 Aug 2014
    Amendment 7 • Extended the study an additional 48 weeks (End of Study = Week 212 [Week 240 for combined 201/202 studies]) • Rescheduled timing for optional muscle biopsy from Week 132 (Protocol Version 06) to between Week 140 and Week 152 (to between Week 168 and Week 180 for combined 201/202 studies) • Updated name of investigational product to “eteplirsen injection” from AVI-4658 Concentrate for Injection” • Changed infusion time from a minimum of 60 minutes to 35 to 60 minutes • Allowed decrease of the postinfusion observation period from 60 minutes to 30 minutes • Added end date (Week 46 [Week 74 for combined 201/202 studies]) for ELISPOT collection • Removed urine cystatin C from laboratory assessments • Updated Schedule of Events table so that ECHO, ECG, and height could be collected on either Day 1 or Day 2 at functional assessment visits after Week 92 (Week 120 for combined 201/202 studies)
    08 Dec 2015
    Amendment 8 • Duration of study was extended from a total of 212 weeks to a total of 236 weeks of treatment to permit continued administration of eteplirsen until it becomes commercially available. • Defined the primary treatment period as the period from baseline through Week 212 (Week 240 for combined 201/202 studies), after which efficacy assessments were discontinued. • Added collection of blood and urine samples at Week 212 (Week 240 for combined 201/202 studies) for the determination of eteplirsen concentrations and PK. • Added a SFU visit to occur 4 weeks after the last eteplirsen infusion if patients do not continue eteplirsen after study completion or discontinuation.
    01 Jul 2016
    Amendment 9 • The study duration was extended from 236 weeks (264 weeks for combined 201/202 studies) to 284 weeks (312 weeks for combined 201/202 studies), plus a 4-week SFU visit. The period following the Week 212 (combined Week 240) was defined as the Safety Extension period, during which patients continue to receive weekly eteplirsen infusions and undergo safety assessments. • Added a full physical examination to the SFU visit.

    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

    Online references

    http://www.ncbi.nlm.nih.gov/pubmed/23907995
    http://www.ncbi.nlm.nih.gov/pubmed/26573217
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