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    Clinical Trial Results:
    Efficacy and safety of 72-hour infusion of Prostacyclin (1 ng/kg/min) in patients with COVID-19 induced respiratory failure – a multicentre randomized, placebo-controlled, blinded, investigator-initiated trial

    Summary
    EudraCT number
    2020-001296-33
    Trial protocol
    DK  
    Global end of trial date
    26 Apr 2021

    Results information
    Results version number
    v1(current)
    This version publication date
    15 Jun 2022
    First version publication date
    15 Jun 2022
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    COMBAT-COVID-19
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT04420741
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Rigshospitalet
    Sponsor organisation address
    Blegdamsvej 9, Copenhagen, Denmark, DK-2100
    Public contact
    Pär Johansson, Section for Transfusion Medicine, Capital Region Blood Bank, Copenhagen University Hospital, +45 35452030, per.johansson@regionh.dk
    Scientific contact
    Pär Johansson, Section for Transfusion Medicine, Capital Region Blood Bank, Copenhagen University Hospital, 35452030 35452030, per.johansson@regionh.dk
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    28 Apr 2022
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    26 Apr 2021
    Global end of trial reached?
    Yes
    Global end of trial date
    26 Apr 2021
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective is to investigate whether continuous infusion of iloprost at a dose of 1 ng/kg/min for 72-hours reduces the severity of respiratory failure in the ICU as compared to placebo.
    Protection of trial subjects
    Patients included in this trial is admitted to the ICU with COVÌD19 requiring respiratory support, therefore these patients will receive the best possible care and monitored closely during their hospital stay.
    Background therapy
    Standard of care for treatment of COVID19
    Evidence for comparator
    Crystalloids are the recommended volume therapy for patients with septic. We have therefore chosen that the placebo should be saline 0.9 % (NaCl) to maintain blinding in the trial as iloprost is diluted in saline. Patients receiving placebo will receive an equal volume of fluid administered in the same way as the iloprost infusion.
    Actual start date of recruitment
    01 May 2020
    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
    Denmark: 80
    Worldwide total number of subjects
    80
    EEA total number of subjects
    80
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    34
    From 65 to 84 years
    46
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Patients are recruited in the periode fra June 2020 to January 2021 in one of the 5 ICU2 in the Capital Region of Denmark.

    Pre-assignment
    Screening details
    Patients are subject for screening if they are 18 years old or above and admitted to an ICU with confirmed COVID19 infection requirering mechanical ventilation. However patients can only be included if souble thrombomodulin is 4 ng/mL or above.

    Period 1
    Period 1 title
    Overall trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator, Monitor, Data analyst, Assessor
    Blinding implementation details
    The trial is double-blinded with saline 0.9 % (NaCl) as placebo to maintain blinding. iloprost is diluted in saline and therefore both solutions are colorless fluids. Patients receiving placebo will receive an equal volume of fluid administered in the same way as the iloprost infusion. The preparation of trial medication will be done by an unblinded nurse, outside the ICU´s, who will be responsible for preparing the investigational drug so that it can be administered in blinded fashion.

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Intervention arm
    Arm description
    Iloprost (Ilomedin®) is a marketed product which will be administered in this trial as the IMP.
    Arm type
    Experimental

    Investigational medicinal product name
    Ilomedin
    Investigational medicinal product code
    Other name
    Prostacyclin
    Pharmaceutical forms
    Solution for solution for infusion
    Routes of administration
    Infusion
    Dosage and administration details
    All patients will receive 72-hour continuous infusion of either active investigational drug or placebo. Patients on active treatment will receive continuous infusion of 1.0 ng/kg/min iloprost. The infusion volume of the active investigational drug and placebo will be 72 ml per 24h.

    Arm title
    Placebo arm
    Arm description
    Saline 0.9% is used as comparator
    Arm type
    Placebo

    Investigational medicinal product name
    Saline 0.9%
    Investigational medicinal product code
    Other name
    sodium chloride
    Pharmaceutical forms
    Solution for infusion
    Routes of administration
    Infusion
    Dosage and administration details
    All patients will receive 72-hour continuous infusion of either active investigational drug or placebo. Patients on placebo will receive continuous infusion equivalent to iloprost. The infusion volume of the active investigational drug and placebo will be 72 ml per 24h.

    Number of subjects in period 1
    Intervention arm Placebo arm
    Started
    41
    39
    Completed
    41
    39

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Intervention arm
    Reporting group description
    Iloprost (Ilomedin®) is a marketed product which will be administered in this trial as the IMP.

    Reporting group title
    Placebo arm
    Reporting group description
    Saline 0.9% is used as comparator

    Reporting group values
    Intervention arm Placebo arm Total
    Number of subjects
    41 39 80
    Age categorical
    Units: Subjects
        In utero
    0 0 0
        Preterm newborn infants (gestational age < 37 wks)
    0 0 0
        Newborns (0-27 days)
    0 0 0
        Infants and toddlers (28 days-23 months)
    0 0 0
        Children (2-11 years)
    0 0 0
        Adolescents (12-17 years)
    0 0 0
        Adults (18-64 years)
    16 18 34
        From 65-84 years
    25 21 46
        85 years and over
    0 0 0
    Gender categorical
    Units: Subjects
        Female
    11 16 27
        Male
    30 23 53

    End points

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    End points reporting groups
    Reporting group title
    Intervention arm
    Reporting group description
    Iloprost (Ilomedin®) is a marketed product which will be administered in this trial as the IMP.

    Reporting group title
    Placebo arm
    Reporting group description
    Saline 0.9% is used as comparator

    Primary: Days alive without mechanical care

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    End point title
    Days alive without mechanical care
    End point description
    Number of days alive and without mechanical ventilation in the ICU for the intention to treat population
    End point type
    Primary
    End point timeframe
    Number of days from baseline to dag 28
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
    median (standard deviation)
        Number of free days
    16 ± 12
    5 ± 10
    Statistical analysis title
    Primary endpoint
    Statistical analysis description
    for the ITT population
    Comparison groups
    Intervention arm v Placebo arm
    Number of subjects included in analysis
    80
    Analysis specification
    Pre-specified
    Analysis type
    other
    P-value
    ≤ 0.05
    Method
    Wilcoxon (Mann-Whitney)
    Confidence interval

    Secondary: Mortality day 28

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    End point title
    Mortality day 28
    End point description
    Number of deaths from baseline to day 28
    End point type
    Secondary
    End point timeframe
    At day 28
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Number
        Number of deaths
    9
    17
    No statistical analyses for this end point

    Secondary: Mortality day 90

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    End point title
    Mortality day 90
    End point description
    Number of deaths from baseline to day 90
    End point type
    Secondary
    End point timeframe
    Day 90
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Number
        Number of deaths
    13
    19
    No statistical analyses for this end point

    Secondary: Days alive without vasopressor day 28

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    End point title
    Days alive without vasopressor day 28
    End point description
    Number of days alive and without vasopressor in the ICU
    End point type
    Secondary
    End point timeframe
    Number of days from baseline to dag 28
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
        Number of free days
    22
    13
    No statistical analyses for this end point

    Secondary: Days alive without vasopressor day 90

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    End point title
    Days alive without vasopressor day 90
    End point description
    Number of days alive and without vasopressor in the ICU
    End point type
    Secondary
    End point timeframe
    Number of days from baseline to dag 90
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
        Number of free days
    84
    59
    No statistical analyses for this end point

    Secondary: Days alive without renal replacement therapy day 28

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    End point title
    Days alive without renal replacement therapy day 28
    End point description
    Number of days alive and without RRT in the ICU
    End point type
    Secondary
    End point timeframe
    Number of days from baseline to dag 28
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
        Number of free days
    28
    21
    No statistical analyses for this end point

    Secondary: Days alive without renal replacement therapy day 90

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    End point title
    Days alive without renal replacement therapy day 90
    End point description
    Number of days alive and without RRT in the ICU
    End point type
    Secondary
    End point timeframe
    Number of days from baseline to dag 90
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
        Number of free days
    90
    79
    No statistical analyses for this end point

    Secondary: Serious adverse events

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    End point title
    Serious adverse events
    End point description
    End point type
    Secondary
    End point timeframe
    Number of events from baseline to dag 7
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Number
        SAE
    1
    5
    No statistical analyses for this end point

    Secondary: Serious adverse reaction

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    End point title
    Serious adverse reaction
    End point description
    End point type
    Secondary
    End point timeframe
    Number of reactions from baseline to dag 7
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Events
        Reactions
    0
    0
    No statistical analyses for this end point

    Secondary: Days alive without mechanical care day 90

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    End point title
    Days alive without mechanical care day 90
    End point description
    Number of days alive and without mechanical ventilation in the ICU
    End point type
    Secondary
    End point timeframe
    Number of days from baseline to dag 90
    End point values
    Intervention arm Placebo arm
    Number of subjects analysed
    41
    39
    Units: Days
        Number of free days
    77
    13
    No statistical analyses for this end point

    Adverse events

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    Adverse events information [1]
    Timeframe for reporting adverse events
    SAE and SAR are collected from baseline to day 7
    Adverse event reporting additional description
    Only selected serious adverse events and serious adverse reaction are collected as these patients are severily ill. Therefore, recording of all AE and SAEs in the CRF will not add valuable information to the patient’s safety in this trial and will make it difficult be distinguish the real safety signal and those sight of the significant reactions
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    none
    Dictionary version
    0
    Reporting groups
    Reporting group title
    Overall trail
    Reporting group description
    -

    Notes
    [1] - There are no non-serious adverse events recorded for these results. It is expected that there will be at least one non-serious adverse event reported.
    Justification: Only certain SAE is reported in this trial due to the severity ilness of the incluted patients
    Serious adverse events
    Overall trail
    Total subjects affected by serious adverse events
         subjects affected / exposed
    6 / 80 (7.50%)
         number of deaths (all causes)
    32
         number of deaths resulting from adverse events
    0
    Vascular disorders
    Bleeding
    Additional description: Bleeding events requiring more than 2 RBCs within 24 hours or ongoing bleeding
         subjects affected / exposed
    2 / 80 (2.50%)
         occurrences causally related to treatment / all
    0 / 2
         deaths causally related to treatment / all
    0 / 2
    limb ischaemia
         subjects affected / exposed
    1 / 80 (1.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Gastrointestinal ischaemia
         subjects affected / exposed
    1 / 80 (1.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Deep vein thrombosis
         subjects affected / exposed
    1 / 80 (1.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Cardiac disorders
    Myocardial ischaemia
         subjects affected / exposed
    1 / 80 (1.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Overall trail
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    0 / 80 (0.00%)

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? No

    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/34813414
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