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    Clinical Trial Results:
    Multicentre, randomised, open label, non-inferiority active-controlled trial to evaluate the efficacy and safety of deferiprone compared to deferasirox in paediatric patients aged from 1 month to less than 18 years of age affected by transfusion-dependent haemoglobinopathies

    Summary
    EudraCT number
    2012-000353-31
    Trial protocol
    IT   Outside EU/EEA   GR   GB  
    Global end of trial date
    21 Sep 2017

    Results information
    Results version number
    v1(current)
    This version publication date
    11 Oct 2019
    First version publication date
    11 Oct 2019
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    DEEP-2
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT01825512
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Consorzio per Valutazioni Biologiche e Farmacologiche
    Sponsor organisation address
    Via Nicolò Putignani 178, Bari, Italy, 70122
    Public contact
    Donato Bonifazi, Consorzio per Valutazioni Biologiche e Farmacologiche Via Nicolò Putignani 178 70122 Bari-Italy, +39 0809751974, donatobonifazi@cvbf.net
    Scientific contact
    Mariagrazia Felisi, Consorzio per Valutazioni Biologiche e Farmacologiche Via Luigi Porta 14 27100 Pavia-Italy, +39 0382.25075, mariagraziafelisi@cvbf.net
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    Yes
    EMA paediatric investigation plan number(s)
    EMEA-001126-PIP01-10
    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
    19 Sep 2018
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    21 Sep 2017
    Global end of trial reached?
    Yes
    Global end of trial date
    21 Sep 2017
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To assess the non-inferiority of Deferiprone compared to Deferasirox in terms of changes in ferritin levels and cardiac iron concentration in paediatric patients affected by hereditary haemoglobinopaties requiring chronic transfusions and chelation.
    Protection of trial subjects
    Study procedures were compliant with the Convention for the Protection of Individuals with regard to Automatic Processing of Personal Data (Strasbourg, 28.I.1981). All laboratory specimens, evaluation forms, reports, video recordings, and other records that leave the site have been identified only by the patient sequential number to maintain subject confidentiality. During the trial, at each visit, all the assessments have been conducted with a constant attention to the minimisation of pain and distress to the patient. The sponsor obtained favourable opinion/approval to conduct the study from the appropriate regulatory agency in accordance with any applicable country-specific regulatory requirements prior to a site initiating the study in that country. Information Document was provided and written consent was obtained from the legal guardian for each subject before participation in the study. Children took part in the information process under the responsibility of parents and the investigator according to their age and maturity level.
    Background therapy
    None
    Evidence for comparator
    Deferasirox is the only oral chelator already on the market for the treatment of chronic iron overload in patients with beta-thalassemia aged 2 years and older.
    Actual start date of recruitment
    17 Mar 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
    United Kingdom: 26
    Country: Number of subjects enrolled
    Italy: 62
    Country: Number of subjects enrolled
    Tunisia: 59
    Country: Number of subjects enrolled
    Egypt: 229
    Country: Number of subjects enrolled
    Albania: 40
    Country: Number of subjects enrolled
    Greece: 11
    Country: Number of subjects enrolled
    Cyprus: 8
    Worldwide total number of subjects
    435
    EEA total number of subjects
    107
    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)
    15
    Children (2-11 years)
    275
    Adolescents (12-17 years)
    145
    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 recruitment is started on March 2014 and finished on July 2016. 23 clinical centres were involved in 7 EU and non-EU countries: Albania (2), Cyprus (1), Greece (1), Egypt (3), Italy (12), Tunisia (1), UK (3).

    Pre-assignment
    Screening details
    Screening period (day -28 to –7): Patients on their standard chelator schedule have been screened for eligibility Washout period (day –6 to –1)

    Pre-assignment period milestones
    Number of subjects started
    435
    Number of subjects completed
    390

    Pre-assignment subject non-completion reasons
    Reason: Number of subjects
    Any study drug dose assumed: 3
    Reason: Number of subjects
    Consent withdrawn by subject: 5
    Reason: Number of subjects
    Lost to Follow-up: 20
    Reason: Number of subjects
    Not meeting inclusion criteria: 17
    Period 1
    Period 1 title
    Treatment (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Deferiprone
    Arm description
    Experimental arm in which patients are administered deferiprone 80 mg/mL oral solution
    Arm type
    Experimental

    Investigational medicinal product name
    Deferiprone
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Oral solution
    Routes of administration
    Oral use
    Dosage and administration details
    Patients administered DFP at 75-100 mg/kg/day for seven days per week. In patients aged less than 6 years the dose has been defined according to the results of the PK Study (Study DEEP-1, EudraCT n. 2012-000658-67). DFP daily dose did not exceed 100 mg/kg. The investigational drug has been provided as 80 mg/mL oral solution packaged in 250 mL amber polyethylene terephthalate bottles with threaded neck. White polypropylene child-resistant caps with foam liners have been used as closures. Administration devices (CE marked) that facilitate accurate measurement of appropriate dose volumes were provided: graduated syringe (10 mL in steps of 0.2 mL) and agraduated measuring cup (30 mL in steps of 2.5 mL).

    Arm title
    Deferasirox
    Arm description
    Control arm in which patients were administered deferasirox dispersible tablets
    Arm type
    Active comparator

    Investigational medicinal product name
    Deferasirox
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Orodispersible tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Patients have been enrolled in the control arm at a DFX starting dose which depends on patient current therapy at screening. For all naïve patients and patients on Deferiprone at screening the starting Deferasirox dose was 20 mg/kg body weight. If the patient’s chelation therapy at screening was Deferoxamine, the starting dose of Deferasirox was numerically half that of the Deferoxamine dose (e.g. a patient receiving 40 mg/kg/day of Deferoxamine for 5 days per week (or equivalent) could be transferred to a starting dose of 20 mg/kg/day of Deferrasirox) but, in any case, to a starting dose not inferior to 20 mg/kg/day. If the patient’s chelation therapy at screening is Deferasirox, the patient starting dose of DFX was his/her current posology as long as this did not exceed 40 mg/kg.

    Number of subjects in period 1 [1]
    Deferiprone Deferasirox
    Started
    193
    197
    Completed
    140
    170
    Not completed
    53
    27
         Consent withdrawn by subject
    12
    7
         Adverse event, non-fatal
    26
    8
         missing data
    2
    1
         Lost to follow-up
    11
    8
         Protocol deviation
    2
    3
    Notes
    [1] - The number of subjects reported to be in the baseline period are not the same as the worldwide number enrolled in the trial. It is expected that these numbers will be the same.
    Justification: The number of subjects enrolled in the trial (N=435) differs from the number of subjects in the baseline period (N=390) because 45 enrolled subjects did not assume the study drugs

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Deferiprone
    Reporting group description
    Experimental arm in which patients are administered deferiprone 80 mg/mL oral solution

    Reporting group title
    Deferasirox
    Reporting group description
    Control arm in which patients were administered deferasirox dispersible tablets

    Reporting group values
    Deferiprone Deferasirox Total
    Number of subjects
    193 197 390
    Age categorical
    Units: Subjects
        <6
    59 58 117
        >=6 and < 10
    47 47 94
        >=10
    87 92 179
    Age continuous
    Units: months
        arithmetic mean (standard deviation)
    111.4 ( 55.17 ) 113.8 ( 57.24 ) -
    Gender categorical
    Units: Subjects
        Female
    80 93 173
        Male
    113 104 217
    Disease
    Units: Subjects
        beta-Thalassemia major
    175 177 352
        Sickle Cell Syndrome
    12 15 27
        Thalassodrepanocytosis
    3 2 5
        Other Haemoglobinopathy
    3 3 6

    End points

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    End points reporting groups
    Reporting group title
    Deferiprone
    Reporting group description
    Experimental arm in which patients are administered deferiprone 80 mg/mL oral solution

    Reporting group title
    Deferasirox
    Reporting group description
    Control arm in which patients were administered deferasirox dispersible tablets

    Primary: percentage of patients successfully chelated, as assessed by serum ferritin levels and cardiac MRI T2*

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    End point title
    percentage of patients successfully chelated, as assessed by serum ferritin levels and cardiac MRI T2*
    End point description
    End point type
    Primary
    End point timeframe
    Ferritin and MRI levels were measured at baseline (V3) and at V15 after 1 year of completed protocol.
    End point values
    Deferiprone Deferasirox
    Number of subjects analysed
    125
    146
    Units: 271
        YES
    69
    80
        NO
    56
    66
    Statistical analysis title
    Non-inferiority efficacy analysis
    Comparison groups
    Deferiprone v Deferasirox
    Number of subjects included in analysis
    271
    Analysis specification
    Pre-specified
    Analysis type
    non-inferiority
    Method
    CI
    Parameter type
    treatment success rate
    Point estimate
    -12.5
    Confidence interval
         level
    95%
         sides
    1-sided
         lower limit
    -12.5
         upper limit
    -

    Secondary: Ferritin level

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    End point title
    Ferritin level
    End point description
    End point type
    Secondary
    End point timeframe
    end of study - baseline
    End point values
    Deferiprone Deferasirox
    Number of subjects analysed
    137
    166
    Units: ng/mL
        arithmetic mean (standard error)
    -397.583 ( 121.794 )
    -398.184 ( 110.619 )
    Statistical analysis title
    GLM Analysis
    Comparison groups
    Deferiprone v Deferasirox
    Number of subjects included in analysis
    303
    Analysis specification
    Pre-specified
    Analysis type
    non-inferiority
    P-value
    = 0.997
    Method
    ANCOVA
    Parameter type
    Mean difference (final values)
    Point estimate
    0.601
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -323.58
         upper limit
    324.781
    Variability estimate
    Standard error of the mean
    Dispersion value
    164.734

    Secondary: Cardiac MRI T2*

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    End point title
    Cardiac MRI T2*
    End point description
    End point type
    Secondary
    End point timeframe
    end of study - baseline
    End point values
    Deferiprone Deferasirox
    Number of subjects analysed
    49
    59
    Units: ms
        arithmetic mean (standard error)
    0.488 ( 1.284 )
    1.121 ( 1.169 )
    Statistical analysis title
    GLM Analysis
    Comparison groups
    Deferiprone v Deferasirox
    Number of subjects included in analysis
    108
    Analysis specification
    Pre-specified
    Analysis type
    non-inferiority
    P-value
    = 0.717
    Method
    ANCOVA
    Parameter type
    Mean difference (final values)
    Point estimate
    -0.633
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -4.085
         upper limit
    2.819
    Variability estimate
    Standard error of the mean
    Dispersion value
    1.741

    Secondary: Liver MRI

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    End point title
    Liver MRI
    End point description
    End point type
    Secondary
    End point timeframe
    end of study - baseline
    End point values
    Deferiprone Deferasirox
    Number of subjects analysed
    46
    60
    Units: mg/g
        arithmetic mean (standard error)
    -0.848 ( 0.887 )
    -2.975 ( 0.776 )
    Statistical analysis title
    GLM model
    Comparison groups
    Deferiprone v Deferasirox
    Number of subjects included in analysis
    106
    Analysis specification
    Pre-specified
    Analysis type
    non-inferiority
    P-value
    = 0.074
    Method
    ANCOVA
    Parameter type
    Mean difference (final values)
    Point estimate
    2.128
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -0.213
         upper limit
    4.468
    Variability estimate
    Standard error of the mean
    Dispersion value
    1.18

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    From Baseline (V3) to the end of treatment (V15)
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    21.0
    Reporting groups
    Reporting group title
    Safety population
    Reporting group description
    -

    Reporting group title
    Deferiprone
    Reporting group description
    -

    Reporting group title
    Deferasirox
    Reporting group description
    -

    Serious adverse events
    Safety population Deferiprone Deferasirox
    Total subjects affected by serious adverse events
         subjects affected / exposed
    27 / 390 (6.92%)
    13 / 193 (6.74%)
    14 / 197 (7.11%)
         number of deaths (all causes)
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    Injury, poisoning and procedural complications
    Testicular injury
         subjects affected / exposed
    1 / 390 (0.26%)
    1 / 193 (0.52%)
    0 / 197 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Surgical and medical procedures
    Splenectomy
         subjects affected / exposed
    1 / 390 (0.26%)
    1 / 193 (0.52%)
    0 / 197 (0.00%)
         occurrences causally related to treatment / all
    1 / 1
    1 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Nervous system disorders
    Seizure
         subjects affected / exposed
    1 / 390 (0.26%)
    1 / 193 (0.52%)
    0 / 197 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Blood and lymphatic system disorders
    Agranulocytosis
         subjects affected / exposed
    3 / 390 (0.77%)
    3 / 193 (1.55%)
    0 / 197 (0.00%)
         occurrences causally related to treatment / all
    3 / 3
    3 / 3
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Neutropenia
         subjects affected / exposed
    2 / 390 (0.51%)
    2 / 193 (1.04%)
    0 / 197 (0.00%)
         occurrences causally related to treatment / all
    2 / 2
    2 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Sickle cell anaemia with crisis
         subjects affected / exposed
    2 / 390 (0.51%)
    0 / 193 (0.00%)
    2 / 197 (1.02%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    2 / 390 (0.51%)
    1 / 193 (0.52%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 1
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Chest pain
         subjects affected / exposed
    2 / 390 (0.51%)
    0 / 193 (0.00%)
    2 / 197 (1.02%)
         occurrences causally related to treatment / all
    0 / 3
    0 / 0
    0 / 3
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Gait disturbance
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Hepatobiliary disorders
    Hypertransaminasaemia
         subjects affected / exposed
    3 / 390 (0.77%)
    2 / 193 (1.04%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    3 / 3
    2 / 2
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Renal and urinary disorders
    Acute kidney injury
         subjects affected / exposed
    2 / 390 (0.51%)
    0 / 193 (0.00%)
    2 / 197 (1.02%)
         occurrences causally related to treatment / all
    1 / 2
    0 / 0
    1 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Musculoskeletal and connective tissue disorders
    Pain in extremity
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Infections and infestations
    Gastroenteritis
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    1 / 1
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Meningitis meningococcal
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Herpangina
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Pneumonia
         subjects affected / exposed
    3 / 390 (0.77%)
    2 / 193 (1.04%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    1 / 3
    1 / 2
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Subcutaneous abscess
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Urinary tract infection
         subjects affected / exposed
    2 / 390 (0.51%)
    1 / 193 (0.52%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 1
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Herpes virus infection
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Impetigo
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Upper respiratory tract infection
         subjects affected / exposed
    1 / 390 (0.26%)
    0 / 193 (0.00%)
    1 / 197 (0.51%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 4%
    Non-serious adverse events
    Safety population Deferiprone Deferasirox
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    241 / 390 (61.79%)
    152 / 193 (78.76%)
    89 / 197 (45.18%)
    Blood and lymphatic system disorders
    Neutropenia
         subjects affected / exposed
    29 / 390 (7.44%)
    18 / 193 (9.33%)
    11 / 197 (5.58%)
         occurrences all number
    41
    26
    15
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    60 / 390 (15.38%)
    28 / 193 (14.51%)
    32 / 197 (16.24%)
         occurrences all number
    96
    40
    56
    Gastrointestinal disorders
    Abdominal pain
         subjects affected / exposed
    28 / 390 (7.18%)
    20 / 193 (10.36%)
    8 / 197 (4.06%)
         occurrences all number
    33
    24
    9
    Vomiting
         subjects affected / exposed
    41 / 390 (10.51%)
    33 / 193 (17.10%)
    8 / 197 (4.06%)
         occurrences all number
    52
    42
    10
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    31 / 390 (7.95%)
    15 / 193 (7.77%)
    16 / 197 (8.12%)
         occurrences all number
    46
    21
    25
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    28 / 390 (7.18%)
    23 / 193 (11.92%)
    5 / 197 (2.54%)
         occurrences all number
    33
    28
    5
    Infections and infestations
    Pharyngitis
         subjects affected / exposed
    24 / 390 (6.15%)
    15 / 193 (7.77%)
    9 / 197 (4.57%)
         occurrences all number
    29
    18
    11

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    03 Feb 2014
    - It has been included as follows: serum creatinine must be assessed in duplicate (for the assessment of inclusion/exclusion criteria only) - It has been included as follows: serum transamninases, biliribin and alkaline phosphatase will be checked before the initiation of treatrment, every 2 weeks during the first month and monthly thereafter
    10 Feb 2015
    1. "Pharmacokinetics” have been modified to limit the number of patients involved in this assessment. 2.“Exclusion criteria”: The exclusion of female lactating patients has been added to avoid risk to breast-feeding infant. 3. “Dose Adjustments” allows the increase of IMPs in situations of stable ferritin levels (> 1500). 4. “Scale down adjustment for DFP and DFX (safety reasons)” has been revised. 5. “Visit schedule and evaluations” has been revised to include ferritin, haematology/biochemistry and CHQ questionnaire assessments also in case of patient withdrawal. 6.“Pregnancy test” has been revised with the inclusion of the procedures allowed for contraception. 7. “Urinalysis” has been revised specifying the frequency of the assessment during the first month after initiation or modification of therapy. 8.“Neutrophil count and Neutropenia management” has been integrated giving precise information with different degree of severity: Neutropenia/Agranulocytosis. 9.“Concomitant medications” has been revised including the list of drug commonly associated with neutropenia. 10. “INTERRUPTION OF TREATMENT” has been revised to include worsening of cardiac MRI T2* values and prolonged IMP suspension (> 4 weeks) as additional criteria leading to premature withdrawal of the patient. 11. “Sample size and power on cardiac MRI T2*”: the number of patients according to the different proposed scenarios (DFX/DFP success, non inferiority margin, power) has been re-calculated and the correct numbers are reported. 12. “Sample size and power on cardiac MRI T2* (percentage of successfully chelated patients)”: the number of patients according to the different proposed scenarios (DFX/DFP success, non inferiority margin, power) has been re-calculated and the correct numbers are reported. 13.“Instructions for rapid notification of Neutropenia” has been added to detail the procedure for the notification.
    10 Dec 2015
    1. “Inclusion Criteria”: as new PK/dosing data of deferiprone in this age group (Study DEEP-1, EudraCT n. 2012-000658-67) are available, the inclusion criterion “for patients aged from 1 month to less than 6 years: known intolerance or contraindication to DFO” has been modified in order to allow children aged from 1 month to less than 6 years without known intolerance or contraindication to deferoxamine to be included in this study. 2. The dropout rate has been increased from 10% to 20% according to a reliable evaluation of the percentage of patients able to complete the study. 3. “Serum Creatinine” and “Urinalysis”: the frequency of the assessment [weekly (± 7 days) during the first month after initiation or modification of therapy] has been revised.

    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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