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    Clinical Trial Results:
    A phase 4, randomized, open label multi-centre clinical study to evaluate efficacy of Isoprinosine® in female subjects with low-grade cervical dysplasia caused by HrHPV.

    Summary
    EudraCT number
    2017-004235-36
    Trial protocol
    CZ  
    Global end of trial date
    02 Sep 2020

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

    Trial information

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    Trial identification
    Sponsor protocol code
    EWO-ISO-2017/2
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Ewopharma AG
    Sponsor organisation address
    Vordergasse 43, Schauffhausen, Switzerland, CH-8200
    Public contact
    Global medical affairs department, Ewopharma International s.r.o., 00421 259429825, e.salapova@ewopharma.com
    Scientific contact
    Global medical affairs department, Ewopharma International s.r.o., 00421 259429825, e.salapova@ewopharma.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    31 Jan 2022
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    02 Sep 2020
    Global end of trial reached?
    Yes
    Global end of trial date
    02 Sep 2020
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To evaluate whether the treatment with IAD contributes to the regression of low grade lesions ASC-US or LSIL (CIN I) cervical lesions associated with HrHPV infection.
    Protection of trial subjects
    Safety and rights of subjects were protected, and the study was conducted in accordance with the protocol. Any other study agreements, International Council for Harmonization (ICH) Good Clinical Practice (GCP), IECs, and all applicable regulatory requirements were met.
    Background therapy
    N/A, Wait-and-watch approach as a standard of care until progression or spontaneous regression of intraepithelial lesion.
    Evidence for comparator
    -
    Actual start date of recruitment
    17 Dec 2018
    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
    Czechia: 171
    Worldwide total number of subjects
    171
    EEA total number of subjects
    171
    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)
    171
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Czech Republic was the only country to participate. The study was initiated on 17 Dec 2018 (First Patient In) and completed on 02 Sep 2020 (Last Patient Out). Subjects were randomly assigned between 26 November 2018 to 11 March 2020 into two groups.

    Pre-assignment
    Screening details
    Pre-screening took up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before Screening (V1). Randomization was performed in 1:1 ratio (study group (IAD) : control group (wait-and-watch as SOC)); stratification by smoking >10 cigarettes/day. 597 subjects were screened, 171 subjects were enrolled.

    Period 1
    Period 1 title
    Overall trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Study Group
    Arm description
    IAD treatment started after randomization on Day 1. On each treatment cycle, subjects received IAD 3x1g (3x2 tablets 500mg daily) for 2 weeks followed by 2 weeks without treatment and this had to be repeated until the End of Study (V4, i.e., 6 cycles of treatment) or progression. In case of withdrawal for any reason a follow up phone call had to be performed for safety.
    Arm type
    Experimental

    Investigational medicinal product name
    Isoprinosine®
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Name of Finished Product: Isoprinosine®, Name of Active Ingredient: Inosine acedoben dimepranol. IAD formulation is a white to off-white tablet containing the active ingredient Inosine acedoben dimepranol (500 mg) and excipients (mannitol, wheat starch, povidone, and magnesium stearate). The dosage established for one treatment cycle was 3x1g (3x2 tablets 500 mg daily) for 2 weeks (14 days) followed by 2 weeks (14 days) without treatment and this had to be repeated until the end of study or progression. Study treatment had to be taken approximately at the same time every day. No regimen modifications were established for this study. However, the only modification could have been the discontinuation of treatment according to the investigator’s criteria.

    Arm title
    Control Group
    Arm description
    Control group - Wait-and-watch: There is no treatment for HrHPV infection so far, and standard of care is wait-and-watch approach till progression or spontaneous regression of intraepithelial lesions.
    Arm type
    No intervention

    Investigational medicinal product name
    No investigational medicinal product assigned in this arm
    Number of subjects in period 1
    Study Group Control Group
    Started
    84
    87
    Completed
    79
    84
    Not completed
    5
    3
         Consent withdrawn by subject
    2
    -
         Adverse event, non-fatal
    1
    -
         Other
    -
    1
         Progression
    2
    2

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Study Group
    Reporting group description
    IAD treatment started after randomization on Day 1. On each treatment cycle, subjects received IAD 3x1g (3x2 tablets 500mg daily) for 2 weeks followed by 2 weeks without treatment and this had to be repeated until the End of Study (V4, i.e., 6 cycles of treatment) or progression. In case of withdrawal for any reason a follow up phone call had to be performed for safety.

    Reporting group title
    Control Group
    Reporting group description
    Control group - Wait-and-watch: There is no treatment for HrHPV infection so far, and standard of care is wait-and-watch approach till progression or spontaneous regression of intraepithelial lesions.

    Reporting group values
    Study Group Control Group Total
    Number of subjects
    84 87 171
    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)
    84 87 171
        From 65-84 years
    0 0 0
        85 years and over
    0 0 0
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    30.9 ( 6.9 ) 32.1 ( 7.5 ) -
    Gender categorical
    Units: Subjects
        Female
    84 87 171
        Male
    0 0 0
    Smoking status
    Units: Subjects
        Never
    46 51 97
        Current
    33 32 65
        Former
    5 4 9
    Race
    Units: Subjects
        Caucasian
    84 87 171
        Other
    0 0 0

    End points

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    End points reporting groups
    Reporting group title
    Study Group
    Reporting group description
    IAD treatment started after randomization on Day 1. On each treatment cycle, subjects received IAD 3x1g (3x2 tablets 500mg daily) for 2 weeks followed by 2 weeks without treatment and this had to be repeated until the End of Study (V4, i.e., 6 cycles of treatment) or progression. In case of withdrawal for any reason a follow up phone call had to be performed for safety.

    Reporting group title
    Control Group
    Reporting group description
    Control group - Wait-and-watch: There is no treatment for HrHPV infection so far, and standard of care is wait-and-watch approach till progression or spontaneous regression of intraepithelial lesions.

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Primary analysis

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Primary analysis
    End point description
    Primary variable (regression) as a derived composite variable defined as negativity of both cytological and histological tests. It was a combination of PAP smear test, histological test and COBAS® HPV test. Summary statistics were calculated by treatment group and by study visit for each component of the primary endpoint. The analysis of the primary variable reflected the restriction on the randomisation implied by the stratification by study centre. The two-sided 95% CI for the treatment difference was calculated using stratified Newcombe CI for proportion differences with the Cochran-Mantel-Haenszel weights. The adjusted effect was obtained by weighted average of stratum specific rate differences. Primary analysis was done in Full Analysis Set (FAS), which was as complete as possible and the closest to the intention-to-treat ideal according to ICH E9. Subject was excluded from FAS if she failed in inclusion criterion No. 2 or 3 or there was no data post randomisation available
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    81
    87
    Units: Totals
    12
    27
    Statistical analysis title
    Primary Variable Analysis (FAS population)
    Statistical analysis description
    The analysis of the primary variable reflected the restriction on the randomisation implied by the stratification by study centre. The two-sided 95% CI for the treatment difference was calculated using stratified Newcombe CI for proportion differences with the Cochran-Mantel-Haenszel weights. The adjusted effect was obtained by weighted average of stratum specific rate differences.
    Comparison groups
    Control Group v Study Group
    Number of subjects included in analysis
    168
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    Method
    Parameter type
    Treatment difference (%)
    Point estimate
    -14.8
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -27
         upper limit
    -2.1
    Statistical analysis title
    Primary Variable: Logistic Model (FAS population)
    Statistical analysis description
    The treatment-by-centre interaction was analysed by using of logistic model with logit link function used with the goal to gain supporting arguments
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    168
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.8997 [1]
    Method
    Chi-squared
    Confidence interval
    Notes
    [1] - p-value for treatment = 0.0118, p-value for centre was 0.0679

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Secondary analysis

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Secondary analysis
    End point description
    Primary variable (regression) as a derived composite variable defined as negativity of both cytological and histological tests. It was a combination of PAP smear test, histological test and COBAS® HPV test. Summary statistics were calculated by treatment group and by study visit for each component of the primary endpoint. The analysis of the primary variable reflected the restriction on the randomisation implied by the stratification by study centre. The two-sided 95% CI for the treatment difference was calculated using stratified Newcombe CI for proportion differences with the Cochran-Mantel-Haenszel weights. The adjusted effect was obtained by weighted average of stratum specific rate differences. Secondary analysis of the primary variable was done in Per-Protocol analyses set (PPS) defined as all subjects from the FAS population without any major protocol deviation as defined in section 12 of the study protocol, except for a lack of the ICF completion.
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    75
    81
    Units: Totals
    12
    24
    Statistical analysis title
    Primary Variable Analysis (PPS population)
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    156
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    Method
    Parameter type
    Treatment difference (%)
    Point estimate
    -12
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -24.7
         upper limit
    1.2

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≥35 years

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≥35 years
    End point description
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    30
    39
    Units: Totals
    7
    10
    Statistical analysis title
    Primary Variable: Subgroup analysis, Age ā‰„35 years
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Age ≥35 years.
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    69
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.825
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≥35 years, with exclusions

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≥35 years, with exclusions
    End point description
    Age ≥35 years, excluded cases with HPV-type change
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    29
    37
    Units: Totals
    7
    10
    Statistical analysis title
    Age ā‰„35 years, excluded cases with HPV-type change
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Age ≥35 years, excluded cases with HPV-type change.
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    66
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.79
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≤40 years, with exclusion due to worsening of PAP Smear test

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Age ≤40 years, with exclusion due to worsening of PAP Smear test
    End point description
    Age ≤40 years, excluded cases with PAP Smear test getting worse during Visit 1,2,3
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    48
    50
    Units: Totals
    11
    23
    Statistical analysis title
    Age ā‰¤40 years, with exclusion due PAP Smear test
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Age ≤40 years, excluded cases with PAP Smear test getting worse during Visit 1,2,3
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    98
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.029
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Negativity of COBAS® test on Visit 4

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Negativity of COBAS® test on Visit 4
    End point description
    Negativity of COBAS® test on Visit 4, 9 subjects in which COBAS® test detected change of the HPV type excluded from FAS
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    74
    83
    Units: Totals
        Negative
    20
    35
        Positive
    54
    48
    Statistical analysis title
    Negativity of COBASĀ® test on Visit 4
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Negativity of COBAS® test on Visit 4, 9 subjects in which COBAS® test detected change of the HPV type excluded from FAS
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    157
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.065
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Negativity of PAP-Smear test on Visit 4

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Negativity of PAP-Smear test on Visit 4
    End point description
    Negativity of PAP-Smear test on Visit 4, 49 subjects in PAP-Smear test detected change of the HPV type excluded from FAS
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    51
    66
    Units: Totals
        Negative
    15
    31
        Positive
    36
    35
    Statistical analysis title
    Negativity of PAP-Smear test on Visit 4
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    117
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.0059
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Ongoing diagnosis related to immune system function

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Ongoing diagnosis related to immune system function
    End point description
    Ongoing diagnosis related to immune system function: Asthma, Asthma bronchiale, Crohns disease, Diabetes mellitus, Diabetes mellitus II, Fatigue, Fatigue states, Fatigue syndrome, Hyperthyreosis, Hypothyreosis, Hypothyroidism, Hypothyrreosa, Chronic gastritis, Chronic rhinitis, Systemic mycosis; 24 cases excluded from FAS
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    69
    75
    Units: Totals
    12
    23
    Statistical analysis title
    Ongoing diagnosis related to immune system functio
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Ongoing diagnosis related to immune system function, 24 cases excluded from FAS
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    144
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.064
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Ongoing allergies and diagnosis related to immune system function

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Ongoing allergies and diagnosis related to immune system function
    End point description
    Ongoing allergies and diagnosis related to immune system function, 35 cases excluded from FAS
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    64
    71
    Units: Totals
    11
    22
    Statistical analysis title
    Allergies and diagnosis related to immune system
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Ongoing allergies and diagnosis related to immune system function, 35 cases excluded from FAS
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    135
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.062
    Method
    Chi-squared
    Confidence interval

    Primary: Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Exclusion due to use of oral contraceptive and ongoing diagnosis related to immune system function

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    End point title
    Proportion of subjects with regression of low grade lesions LSIL (CIN I) in 6 months after randomization - Subgroup analyses, Exclusion due to use of oral contraceptive and ongoing diagnosis related to immune system function
    End point description
    Use of Oral contraceptives and with ongoing diagnosis related to immune system function excluded from FAS
    End point type
    Primary
    End point timeframe
    From pre-screening (Up to 12 months from cytological confirmed ASC-US or LSIL, or histologically confirmed CIN 1, or both before V1) to End of Study Visit (V4).
    End point values
    Study Group Control Group
    Number of subjects analysed
    43
    51
    Units: Totals
    10
    19
    Statistical analysis title
    Exclusion due to oral contraceptive use
    Statistical analysis description
    Although subgroup analyses were not planned initially, the analysis of the primary outcome was repeated for some groups in order to obtain a better knowledge of drug efficacy versus the non-intervention approach. This was an analysis of regression in FAS population, Use of Oral contraceptives and with ongoing diagnosis related to immune system function excluded from FAS
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    94
    Analysis specification
    Post-hoc
    Analysis type
    superiority
    P-value
    = 0.143
    Method
    Chi-squared
    Confidence interval

    Secondary: Proportion of subjects with HrHPV negative cervical samples assessed by COBAS test between IAD treatment group and control group - Visit 4

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    End point title
    Proportion of subjects with HrHPV negative cervical samples assessed by COBAS test between IAD treatment group and control group - Visit 4
    End point description
    The analysis was done for both Visit 3 and Visit 4 separately. Analyses population: Full Analysis Set (FAS), which was as complete as possible and the closest to the intention-to-treat ideal according to ICH E9. Subject was excluded from FAS if she failed in inclusion criterion No. 2 or 3 or there was no data post randomisation available
    End point type
    Secondary
    End point timeframe
    From Screening to Visit 4 (End of Study).
    End point values
    Study Group Control Group
    Number of subjects analysed
    80
    86
    Units: Totals
    20
    35
    Statistical analysis title
    Negative COBASĀ® Test at Visit 4
    Comparison groups
    Study Group v Control Group
    Number of subjects included in analysis
    166
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    Method
    Parameter type
    Treatment difference (%)
    Point estimate
    -14.3
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -27.8
         upper limit
    0

    Secondary: The overall safety and tolerability of IAD as assessed by evaluating of adverse events and serious adverse events (SAE) reported during the course of the study

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    End point title
    The overall safety and tolerability of IAD as assessed by evaluating of adverse events and serious adverse events (SAE) reported during the course of the study
    End point description
    AEs coded by MedDRA were listed and summarised by treatment group. Counts of patients experiencing AE were presented by MedDRA System Organ Class (SOC), MedDRA Preferred Term (PT), causality and severity. Summary of AEs is presented here.
    End point type
    Secondary
    End point timeframe
    AE data collection begun after a subject signed the ICF and continued until study completion (V4, completers) or until completion of safety follow up (performed for withdrawals only as phone call after 14 days after withdrawal).
    End point values
    Study Group Control Group
    Number of subjects analysed
    84
    87
    Units: Totals
        Any AE
    17
    14
        Related
    4
    0
        Severe Intensity
    0
    1
        Serious AE
    1
    1
        Death= an AE with fatal outcome
    0
    0
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    AE data collection begun after a subject signed the ICF and continued until study completion (V4, completers) or until completion of safety follow up (performed for withdrawals only as phone call after 14 days after withdrawal).
    Assessment type
    Non-systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    23.0
    Reporting groups
    Reporting group title
    Study Group
    Reporting group description
    IAD treatment started after randomization on Day 1. On each treatment cycle, subjects received IAD 3x1g (3x2 tablets 500mg daily) for 2 weeks followed by 2 weeks without treatment and this had to be repeated until the End of Study (V4, i.e., 6 cycles of treatment) or progression. In case of withdrawal for any reason a follow up phone call had to be performed for safety.

    Reporting group title
    Control Group
    Reporting group description
    Control group - Wait-and-watch: There is no treatment for HrHPV infection so far, and standard of care is wait-and-watch approach till progression or spontaneous regression of intraepithelial lesions.

    Serious adverse events
    Study Group Control Group
    Total subjects affected by serious adverse events
         subjects affected / exposed
    1 / 84 (1.19%)
    1 / 87 (1.15%)
         number of deaths (all causes)
    0
    0
         number of deaths resulting from adverse events
    0
    0
    Injury, poisoning and procedural complications
    Meniscus injury
         subjects affected / exposed
    0 / 84 (0.00%)
    1 / 87 (1.15%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Abdominal pain upper
         subjects affected / exposed
    1 / 84 (1.19%)
    0 / 87 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 3%
    Non-serious adverse events
    Study Group Control Group
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    10 / 84 (11.90%)
    4 / 87 (4.60%)
    Nervous system disorders
    Headache
         subjects affected / exposed
    3 / 84 (3.57%)
    0 / 87 (0.00%)
         occurrences all number
    4
    0
    Infections and infestations
    Nasopharyngitis
         subjects affected / exposed
    4 / 84 (4.76%)
    1 / 87 (1.15%)
         occurrences all number
    4
    1
    Tonsillitis
         subjects affected / exposed
    3 / 84 (3.57%)
    0 / 87 (0.00%)
         occurrences all number
    3
    0
    Vulvovaginal mycotic infection
         subjects affected / exposed
    0 / 84 (0.00%)
    3 / 87 (3.45%)
         occurrences all number
    0
    3

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    26 Sep 2018
    Protocol Version 3, dated 20 Aug 2018, Amendment 1 Considering the immunomodulatory effects of the tested product Isoprinosine, exclusion of patients with HIV infection was recommended by CZ RA during review of the initial clinical trial application. Examination for HIV antibodies level during screening in order to exclude patients with positive results was requested by CZ RA. Following changes were made to the original Protocol: 1. Exclusion criterion 1: ASC-H was added 2. Exclusion criterion 12: HIV Positive Subjects 3. Exclusion criterion 13: Subjects with liver disorder (severe liver function impairment, AST and ALT value greater than 3 times the upper limit of normal 4. HIV test was added to the Table 1: Schedule of assessment at the V1- Screening visit 5. HIV test was added to the visit schedule and Assessment to the screening period describing Screening visit V1 6. Other administrative and minor formatting changes were made.
    29 Mar 2019
    Protocol Version 4, dated 25 Feb 2019, Amendment 2 Summary of significant changes: 1. Inclusion criterion 1: Upper age limit was changed from 40 years to 47 years 2. Inclusion criterion 2: Cytologically confirmed ASC-US/LSIL within the last 24 weeks before randomisation was changed to: Cytologically confirmed ASC-US/LSIL or histologically confirmed CIN1 or both within the last 12 month before the screening (V1) visit. In case the cytological examination was not done or was negative in pre-screening period, histologically confirmed CIN 1 will prevail. 3. Exclusion criterion 2: Subjects participating in any clinical trial within 3 months before enrolment was changed to: Subjects using any investigational drug within 3 months before enrolment. 4. Exclusion criterion 7: abnormal serum creatinine at screening (V1) visit was changed to: increase of serum creatinine at screening (V1) visit assessed as clinically significant by investigator. 5. Exclusion criterion 11: Subject with a history of gout, hyperuricaemia, urolithiasis was changed to: Subjects with a history of gout, urolithiasis and clinically significant hyperuricemia assessed by investigator at the V1. 6. Address of EU Legal Representative of Sponsor was changed from Hlavná 13, 831 01 Bratislava, Slovakia to Prokopa Veľkého 52, 811 04 Bratislava, Slovakia.

    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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