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    Clinical Trial Results:
    A trial investigating ultra-long-acting basal insulins’ flexibility around multiple spontaneous exercise sessions in people with type 1 diabetes: a head to head comparison of 2nd generation insulin Glargine U300 (IGlar-U300) to insulin Degludec U100 (IDeg-U100)

    Summary
    EudraCT number
    2019-003209-89
    Trial protocol
    AT  
    Global end of trial date
    13 Dec 2021

    Results information
    Results version number
    v1(current)
    This version publication date
    19 Jul 2023
    First version publication date
    19 Jul 2023
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    ULTRAFLEXI1
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Other trial identifiers
    DRKS: DRKS00018065
    Sponsors
    Sponsor organisation name
    Medical University of Graz
    Sponsor organisation address
    Neue Stiftingtalstrasse 6, Graz, Austria,
    Public contact
    Mag. Alexander Müller (Project Management), Medical University of Graz, alexander.mueller@medunigraz.at
    Scientific contact
    Prof. Dr. Harald Sourij (Principal Investigator), Medical University of Graz, ha.sourij@medunigraz.at
    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
    01 Mar 2023
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    13 Dec 2021
    Global end of trial reached?
    Yes
    Global end of trial date
    13 Dec 2021
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    Primary objective To compare time spent in hypoglycaemia (< 3.9 mmol/L [<70 mg/dL]) for the 6 x 24-hour post-exercise period around multiple spontaneous exercise sessions (3 times per week spread over 2 weeks for each trial arm) on either a regular (100%) or 75% IGlar-U300 and IDeg-U100 dose
    Protection of trial subjects
    Adverse events, hypoglycaemic episodes (also defined as a safety outcome), laboratory safety variables (hematology, biochemistry, coagulation, urinalysis), physical examination, vital signs, and electrocardiogram will be recorded during the study period. pre-, during- and post-exercise sessions blood glucose will be measured and carbohydrates will be given if necessary
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    01 Oct 2019
    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
    Austria: 25
    Worldwide total number of subjects
    25
    EEA total number of subjects
    25
    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)
    25
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Subjects will be recruited from the participant database kept at the trial site

    Pre-assignment
    Screening details
    Screening Visit: oral and written infos. After signing IC at the screening Visit participants will be screened for eligibility. They perform a cardiopulmonary exercise test to determine the peak oxygen uptake. They get applicated a blinded CGM device. Based on randomization of the type of insulin they will be titrated. Discussion of all procedures.

    Period 1
    Period 1 title
    Time spent in hypoglycaemia Ideg 100%
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Arm title
    IDeg-U100 100% regular dose
    Arm description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the regular 100% dosage of the insulin IDeg-U100.
    Arm type
    Active comparator

    Investigational medicinal product name
    Ideg-U100
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Participants receive a phone call from the research team at 08.00 that contains the information to inject at 10.00 a regular basal insulin dose of randomized insulin and dosage. The exercise sessions will be performed at 18:00 at the trial unit center. Based on the randomization of the type of basal insulin, participants will be titrated to IGlar-U300 or IDeg-U100 over a maximum titration period of 4 weeks to achieve a morning fasted blood glucose concentration of 80 - 130 mg/dL (4.4 – 7.2 mmol/L) over 3 consecutive days. For both basal insulins, the first dose is 0.3 IU/kg body weight. Participants will administer IGlar-U300 and IDeg-U100 as a subcutaneous injection into a lifted skin fold on the surface of the abdomen or thigh.

    Number of subjects in period 1
    IDeg-U100 100% regular dose
    Started
    25
    Completed
    25
    Period 2
    Period 2 title
    Time spent in hypoglycaemia Ideg 75%
    Is this the baseline period?
    No
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Arm title
    IDeg-U100 75% reduced dose
    Arm description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the reduced 75% dosage of the insulin IDeg-U100.
    Arm type
    Experimental

    Investigational medicinal product name
    IDeg-U100
    Investigational medicinal product code
    Other name
    Tresiba
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Participants receive a phone call from the research team at 08.00 that contains the information to inject at 10.00 a reduced basal insulin dose of randomized insulin and dosage. The exercise sessions will be performed at 18:00 at the trial unit center. Based on the randomization of the type of basal insulin, participants will be titrated to IGlar-U300 or IDeg-U100 over a maximum titration period of 4 weeks to achieve a morning fasted blood glucose concentration of 80 - 130 mg/dL (4.4 – 7.2 mmol/L) over 3 consecutive days. For both basal insulins, the first dose is 0.3 IU/kg body weight. Participants will administer IGlar-U300 and IDeg-U100 as a subcutaneous injection into a lifted skin fold on the surface of the abdomen or thigh.

    Number of subjects in period 2
    IDeg-U100 75% reduced dose
    Started
    25
    Completed
    25
    Period 3
    Period 3 title
    Time spent in hypoglycaemia Iglar 100%
    Is this the baseline period?
    No
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Arm title
    IGlar-U300 100% regular dose
    Arm description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the regular 100% dosage of the insulin IGlar-U300.
    Arm type
    Experimental

    Investigational medicinal product name
    IGlar-U300
    Investigational medicinal product code
    Other name
    Toujeo
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Participants receive a phone call from the research team at 08.00 that contains the information to inject at 10.00 a regular basal insulin dose of randomized insulin and dosage. The exercise sessions will be performed at 18:00 at the trial unit center. Based on the randomization of the type of basal insulin, participants will be titrated to IGlar-U300 or IDeg-U100 over a maximum titration period of 4 weeks to achieve a morning fasted blood glucose concentration of 80 - 130 mg/dL (4.4 – 7.2 mmol/L) over 3 consecutive days. For both basal insulins, the first dose is 0.3 IU/kg body weight. Participants will administer IGlar-U300 and IDeg-U100 as a subcutaneous injection into a lifted skin fold on the surface of the abdomen or thigh.

    Number of subjects in period 3
    IGlar-U300 100% regular dose
    Started
    25
    Completed
    25
    Period 4
    Period 4 title
    Time spent in hypoglycaemia Iglar 75%
    Is this the baseline period?
    No
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Arm title
    IGlar-U300 75% reduced dose
    Arm description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the reduced 75% dosage of the insulin IGlar-U300.
    Arm type
    Experimental

    Investigational medicinal product name
    IGlar-U300
    Investigational medicinal product code
    Other name
    Toujeo
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Participants receive a phone call from the research team at 08.00 that contains the information to inject at 10.00 a reduced basal insulin dose of randomized insulin and dosage. The exercise sessions will be performed at 18:00 at the trial unit center. Based on the randomization of the type of basal insulin, participants will be titrated to IGlar-U300 or IDeg-U100 over a maximum titration period of 4 weeks to achieve a morning fasted blood glucose concentration of 80 - 130 mg/dL (4.4 – 7.2 mmol/L) over 3 consecutive days. For both basal insulins, the first dose is 0.3 IU/kg body weight. Participants will administer IGlar-U300 and IDeg-U100 as a subcutaneous injection into a lifted skin fold on the surface of the abdomen or thigh.

    Number of subjects in period 4
    IGlar-U300 75% reduced dose
    Started
    25
    Completed
    25

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Time spent in hypoglycaemia Ideg 100%
    Reporting group description
    -

    Reporting group values
    Time spent in hypoglycaemia Ideg 100% Total
    Number of subjects
    25 25
    Age categorical
    Units: Subjects
        In utero
    0 0
        Preterm newborn infants (gestational age < 37 wks)
    0 0
        Newborns (0-27 days)
    0 0
        Infants and toddlers (28 days-23 months)
    0 0
        Children (2-11 years)
    0 0
        Adolescents (12-17 years)
    0 0
        Adults (18-64 years)
    25 25
        From 65-84 years
    0 0
        85 years and over
    0 0
        Adults (18-65)
    0 0
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    41.4 ± 11.9 -
    Gender categorical
    Units: Subjects
        Female
    11 11
        Male
    14 14

    End points

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    End points reporting groups
    Reporting group title
    IDeg-U100 100% regular dose
    Reporting group description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the regular 100% dosage of the insulin IDeg-U100.
    Reporting group title
    IDeg-U100 75% reduced dose
    Reporting group description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the reduced 75% dosage of the insulin IDeg-U100.
    Reporting group title
    IGlar-U300 100% regular dose
    Reporting group description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the regular 100% dosage of the insulin IGlar-U300.
    Reporting group title
    IGlar-U300 75% reduced dose
    Reporting group description
    Out of a total of 24 training units, 25 participants performed 6 constant load exercise sessions with the reduced 75% dosage of the insulin IGlar-U300.

    Primary: Time below range <70mg/dL during 24h post exercise periods of six spontaneous exercise sessions in the four trial arms on either a regular (100%) or reduced (75%) IGlar-U300 and Ideg-U100 dose

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    End point title
    Time below range <70mg/dL during 24h post exercise periods of six spontaneous exercise sessions in the four trial arms on either a regular (100%) or reduced (75%) IGlar-U300 and Ideg-U100 dose
    End point description
    End point type
    Primary
    End point timeframe
    Data collection over a period of 19 months.
    End point values
    IDeg-U100 100% regular dose IDeg-U100 75% reduced dose IGlar-U300 100% regular dose IGlar-U300 75% reduced dose
    Number of subjects analysed
    25
    25
    25
    25
    Units: CGM Data, Blood Glucose
        arithmetic mean (standard deviation)
    4.37 ± 0.69
    2.55 ± 0.58
    2.71 ± 0.51
    2.28 ± 0.53
    Statistical analysis title
    Comparison of IGlar-U300 with Idee-U100
    Comparison groups
    IDeg-U100 100% regular dose v IDeg-U100 75% reduced dose v IGlar-U300 100% regular dose v IGlar-U300 75% reduced dose
    Number of subjects included in analysis
    100
    Analysis specification
    Pre-specified
    Analysis type
    non-inferiority
    P-value
    = 0.05
    Method
    Mixed models analysis
    Confidence interval

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    11.05.2020 - 13.12.2021
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    22.1
    Reporting groups
    Reporting group title
    insert a cannula in the antecubital vein
    Reporting group description
    The subject reports dizziness and discomfort during the placement of a venous access.

    Reporting group title
    cold/elevated temperature/cough
    Reporting group description
    -

    Reporting group title
    headaches/migraine
    Reporting group description
    -

    Reporting group title
    vaccination reaction (COVID)
    Reporting group description
    tiredness, headache, elevated temperature, prick pain

    Reporting group title
    bicycle accident
    Reporting group description
    While dismounting from the bicycle, the subject hit their head and had to be treated. (Leisure accident)

    Reporting group title
    nausea and dizziness after max. CPX text
    Reporting group description
    The subject felt nausea and dizziness at the end/ after a maximum cardiopulmonary exercise test (CPX).

    Reporting group title
    Hyperglycemia before visit
    Reporting group description
    The subject is in hyperglycemic conditions before the start of the visit.

    Serious adverse events
    insert a cannula in the antecubital vein cold/elevated temperature/cough headaches/migraine vaccination reaction (COVID) bicycle accident nausea and dizziness after max. CPX text Hyperglycemia before visit
    Total subjects affected by serious adverse events
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         number of deaths (all causes)
    0
    0
    0
    0
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    0
    0
    0
    0
    0
    Frequency threshold for reporting non-serious adverse events: 2.5%
    Non-serious adverse events
    insert a cannula in the antecubital vein cold/elevated temperature/cough headaches/migraine vaccination reaction (COVID) bicycle accident nausea and dizziness after max. CPX text Hyperglycemia before visit
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    1 / 1 (100.00%)
    5 / 5 (100.00%)
    2 / 2 (100.00%)
    4 / 4 (100.00%)
    1 / 1 (100.00%)
    1 / 1 (100.00%)
    1 / 1 (100.00%)
    Investigations
    insert a cannula in the antecubital vein
    alternative assessment type: Non-systematic
         subjects affected / exposed
    1 / 1 (100.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         occurrences all number
    1
    0
    0
    0
    0
    0
    0
    vaccination reaction (COVID)
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    4 / 4 (100.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         occurrences all number
    0
    0
    0
    4
    0
    0
    0
    nausea and dizziness after max. CPX text
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    1 / 1 (100.00%)
    0 / 1 (0.00%)
         occurrences all number
    0
    0
    0
    0
    0
    1
    0
    Injury, poisoning and procedural complications
    bicycle accident
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    1 / 1 (100.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         occurrences all number
    0
    0
    0
    0
    1
    0
    0
    Infections and infestations
    cold/elevated temperature/cough
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    5 / 5 (100.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         occurrences all number
    0
    5
    0
    0
    0
    0
    0
    headaches/migraine
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    2 / 2 (100.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
         occurrences all number
    0
    0
    2
    0
    0
    0
    0
    Metabolism and nutrition disorders
    Hyperglycemia before visit
    alternative assessment type: Non-systematic
         subjects affected / exposed
    0 / 1 (0.00%)
    0 / 5 (0.00%)
    0 / 2 (0.00%)
    0 / 4 (0.00%)
    0 / 1 (0.00%)
    0 / 1 (0.00%)
    1 / 1 (100.00%)
         occurrences all number
    0
    0
    0
    0
    0
    0
    1

    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/36516429
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