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    Clinical Trial Results:
    A Phase 3, Global, Multicenter, Randomized, Open-Label Study to Investigate the Safety and Efficacy of Sofosbuvir/Velpatasvir/GS-9857 Fixed-Dose Combination for 12 Weeks and Sofosbuvir/Velpatasvir for 12 Weeks in Direct-Acting Antiviral-Experienced Subjects with Chronic HCV Infection who Have Not Received an NS5A Inhibitor

    Summary
    EudraCT number
    		 2015-003167-10
    Trial protocol
    		 DE   FR   GB  
    Global end of trial date
    18 Jan 2017

    Results information
    Results version number
    		 v1(current)
    This version publication date
    01 Feb 2018
    First version publication date
    01 Feb 2018
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    GS-US-367-1170
    Additional study identifiers
    ISRCTN number
    		 -
    US NCT number
    		 NCT02639247
    WHO universal trial number (UTN)
    		 -
    Sponsors
    Sponsor organisation name
    Gilead Sciences
    Sponsor organisation address
    333 Lakeside Drive, Foster City, CA, United States, 94404
    Public contact
    Clinical Trials Mailbox, Gilead Sciences International Ltd., GileadClinicalTrials@gilead.com
    Scientific contact
    Clinical Trials Mailbox, Gilead Sciences International Ltd., GileadClinicalTrials@gilead.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
    18 Jan 2017
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    05 Oct 2016
    Global end of trial reached?
    Yes
    Global end of trial date
    18 Jan 2017
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective of the study was to evaluate the efficacy, safety, and tolerability of treatment with sofosbuvir/velpatasvir/voxilaprevir (Vosevi®; SOF/VEL/VOX) fixed-dose combination (FDC) for 12 weeks and of sofosbuvir/velpatasvir (Epclusa®; SOF/VEL) FDC for 12 weeks in direct-acting antiviral (DAA)-experienced adults with chronic hepatitis C virus (HCV) infection with or without cirrhosis who have not received prior treatment with a regimen containing an inhibitor of the HCV NS5A protein.
    Protection of trial subjects
    The protocol and consent/assent forms were submitted by each investigator to a duly constituted Independent Ethics Committee (IEC) or Institutional Review Board (IRB) for review and approval before study initiation. All revisions to the consent/assent forms (if applicable) after initial IEC/IRB approval were submitted by the investigator to the IEC/IRB for review and approval before implementation in accordance with regulatory requirements. This study was conducted in accordance with recognized international scientific and ethical standards, including but not limited to the International Conference on Harmonization guideline for Good Clinical Practice (ICH GCP) and the original principles embodied in the Declaration of Helsinki.
    Background therapy
    		 -
    Evidence for comparator
    		 -
    Actual start date of recruitment
    23 Dec 2015
    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: 12
    Country: Number of subjects enrolled
    France: 45
    Country: Number of subjects enrolled
    Germany: 24
    Country: Number of subjects enrolled
    Canada: 38
    Country: Number of subjects enrolled
    Australia: 23
    Country: Number of subjects enrolled
    United States: 188
    Country: Number of subjects enrolled
    New Zealand: 3
    Worldwide total number of subjects
    333
    EEA total number of subjects
    81
    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)
    284
    From 65 to 84 years
    48
    85 years and over
    1

    Subject disposition

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    Recruitment
    Recruitment details
    		 Participants were enrolled across 101 study sites in North America, Europe, and Asia Pacific. The first participant was screened on 23 December 2015. The last study visit occurred on 18 January 2017.

    Pre-assignment
    Screening details
    		 397 participants were screened.

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

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    		 SOF/VEL/VOX 12 Weeks
    Arm description
    		 SOF/VEL/VOX (400/100/100 mg) fixed-dose combination (FDC) tablet orally once daily for 12 weeks
    Arm type
    		 Experimental

    Investigational medicinal product name
    SOF/VEL/VOX
    Investigational medicinal product code
    Other name
    Vosevi®, GS-7977/GS-5816/GS-9857
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    400/100/100 mg FDC tablet administered orally once daily with food

    Arm title
    		 SOF/VEL 12 Weeks
    Arm description
    		 SOF/VEL (400/100 mg) FDC tablet orally once daily for 12 weeks
    Arm type
    		 Experimental

    Investigational medicinal product name
    SOF/VEL
    Investigational medicinal product code
    Other name
    Epclusa®, GS-7977/GS-5816
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    400/100 mg FDC tablet administered orally once daily without regard to food

    Number of subjects in period 1
    		SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Started
    182
    151
    Completed
    177
    149
    Not completed
    5
    2
         Withdrew Consent
    -
    1
         Death
    2
    -
         Protocol Violation
    1
    -
         Lost to follow-up
    2
    1

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    SOF/VEL/VOX 12 Weeks
    Reporting group description
    		 SOF/VEL/VOX (400/100/100 mg) fixed-dose combination (FDC) tablet orally once daily for 12 weeks

    Reporting group title
    SOF/VEL 12 Weeks
    Reporting group description
    		 SOF/VEL (400/100 mg) FDC tablet orally once daily for 12 weeks

    Reporting group values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks Total
    Number of subjects
    		 182 151 333
    Age categorical
    Units: Subjects
    Age continuous
    Safety Analysis Set: all participants who received at least 1 dose of study drug
    Units: years
        arithmetic mean (standard deviation)
    		 57 ( 9.0 ) 57 ( 7.3 ) -
    Gender categorical
    Units: Subjects
        Female
    		 39 37 76
        Male
    		 143 114 257
    Race/Ethnicity
    Units: Subjects
        White
    		 160 131 291
        Black or African American
    		 16 13 29
        Asian
    		 2 4 6
        Other
    		 2 1 3
        American Indian or Alaska Native
    		 2 0 2
        Native Hawaiian or Pacific Islander
    		 0 2 2
    Race/Ethnicity
    Units: Subjects
        Hispanic or Latino
    		 19 8 27
        Not Hispanic or Latino
    		 163 143 306
    IL28b Status
    The CC, CT, and TT alleles are different forms of the IL28b gene.
    Units: Subjects
        CC
    		 33 29 62
        CT
    		 107 95 202
        TT
    		 42 27 69
    HCV RNA Category
    Units: Subjects
        < 800,000 IU/mL
    		 46 38 84
        ≥ 800,000 IU/mL
    		 136 113 249
    HCV RNA
    Units: log10 IU/mL
        arithmetic mean (standard deviation)
    		 6.3 ( 0.56 ) 6.3 ( 0.66 ) -

    End points

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    End points reporting groups
    Reporting group title
    SOF/VEL/VOX 12 Weeks
    Reporting group description
    		 SOF/VEL/VOX (400/100/100 mg) fixed-dose combination (FDC) tablet orally once daily for 12 weeks

    Reporting group title
    SOF/VEL 12 Weeks
    Reporting group description
    		 SOF/VEL (400/100 mg) FDC tablet orally once daily for 12 weeks

    Primary: Percentage of Participants With Sustained Virologic Response (SVR) 12 Weeks After Discontinuation of Therapy (SVR12)

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    End point title
    		 Percentage of Participants With Sustained Virologic Response (SVR) 12 Weeks After Discontinuation of Therapy (SVR12) [1]
    End point description
    SVR12 is defined as HCV RNA < the lower limit of quantitation (LLOQ) at 12 weeks after stopping study treatment. Full Analysis Set (FAS) included all randomized or enrolled participants who took at least 1 dose of study drug.
    End point type
    Primary
    End point timeframe
    Posttreatment Week 12
    Notes
    [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: The statistical analysis of this primary endpoint is provided in the attachment.
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: percentage of participants
        number (confidence interval 95%)
    97.8 (94.5 to 99.4)
    90.1 (84.1 to 94.3)
    Attachments
    		 Primary_Endpoint_StatsAnalysis
    No statistical analyses for this end point

    Primary: Percentage of Participants Who Permanently Discontinue Study Drug Due to an Adverse Event

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    End point title
    		 Percentage of Participants Who Permanently Discontinue Study Drug Due to an Adverse Event [2]
    End point description
    Safety Analysis Set included participants who took at least 1 dose of study drug.
    End point type
    Primary
    End point timeframe
    Up to 12 weeks
    Notes
    [2] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: No statistical analysis was planned or performed.
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: percentage of participants
        number (not applicable)
    0
    0.7
    No statistical analyses for this end point

    Secondary: Percentage of Participants With SVR at 4 and 24 Weeks After Discontinuation of Therapy (SVR4 and SVR24)

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    End point title
    		 Percentage of Participants With SVR at 4 and 24 Weeks After Discontinuation of Therapy (SVR4 and SVR24)
    End point description
    SVR4 and SVR24 are defined as HCV RNA < LLOQ at 4 and 24 weeks after stopping study treatment, respectively. Full Analysis Set.
    End point type
    Secondary
    End point timeframe
    Posttreatment Weeks 4 and 24
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: percentage of participants
    number (confidence interval 95%)
        SVR4
    98.4 (95.3 to 99.7)
    91.4 (85.7 to 95.3)
        SVR24
    97.8 (94.5 to 99.4)
    90.1 (84.1 to 94.3)
    No statistical analyses for this end point

    Secondary: Percentage of Participants With HCV RNA < LLOQ On Treatment

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    End point title
    		 Percentage of Participants With HCV RNA < LLOQ On Treatment
    End point description
    Full Analysis Set
    End point type
    Secondary
    End point timeframe
    Weeks 1, 2, 4, 8 and 12
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: percentage of participants
    number (confidence interval 95%)
        Week 1
    15.9 (10.9 to 22.1)
    17.2 (11.6 to 24.2)
        Week 2
    62.6 (55.2 to 69.7)
    56.3 (48.0 to 64.3)
        Week 4
    88.5 (82.9 to 92.7)
    90.7 (84.9 to 94.8)
        Week 8
    100.0 (98.0 to 100.0)
    98.7 (95.3 to 99.8)
        Week 12
    98.9 (96.1 to 99.9)
    99.3 (96.3 to 100.0)
    No statistical analyses for this end point

    Secondary: Change From Baseline in HCV RNA

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    End point title
    		 Change From Baseline in HCV RNA
    End point description
    Participants in the Full Analysis Set with available data were analyzed.
    End point type
    Secondary
    End point timeframe
    Weeks 1, 2, 4, 8, and 12
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: log10 IU/mL
    arithmetic mean (standard deviation)
        Change at Wk 1 (SOF/VEL/VOX:N=181, SOF/VEL:N=148)
    -4.29 ( 0.627 )
    -4.17 ( 0.651 )
        Change at Wk 2 (SOF/VEL/VOX:N=180, SOF/VEL:N=151)
    -4.93 ( 0.604 )
    -4.78 ( 0.677 )
        Change at Wk 4 (SOF/VEL/VOX:N=182, SOF/VEL:N=151)
    -5.13 ( 0.561 )
    -5.06 ( 0.66 )
        Change at Wk 8 (SOF/VEL/VOX:N=182, SOF/VEL:N=150)
    -5.17 ( 0.562 )
    -5.08 ( 0.759 )
        Change at Wk 12 (SOF/VEL/VOX:N=180, SOF/VEL:N=150)
    -5.17 ( 0.559 )
    -5.09 ( 0.727 )
    No statistical analyses for this end point

    Secondary: Percentage of Participants With Virologic Failure

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    End point title
    		 Percentage of Participants With Virologic Failure
    End point description
    - On-treatment virologic failure: -- Breakthrough (confirmed HCV RNA ≥ LLOQ after having previously had HCV RNA < LLOQ while on treatment), or -- Rebound (confirmed > 1 log10 IU/mL increase in HCV RNA from nadir while on treatment), or -- Non-response (HCV RNA persistently ≥ LLOQ through 8 weeks of treatment) - Virologic relapse: -- Confirmed HCV RNA ≥ LLOQ during the posttreatment period having achieved HCV RNA < LLOQ at last on-treatment visit.
    End point type
    Secondary
    End point timeframe
    Up to Posttreatment Week 24
    End point values
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Number of subjects analysed
    182
    151
    Units: percentage of participants
        number (not applicable)
    0.5
    9.9
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Up to 12 weeks plus 30 days
    Adverse event reporting additional description
    Safety Analysis Set: all participants who received at least 1 dose of study drug
    Assessment type
    		 Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    		 MedDRA
    Dictionary version
    19.0
    Reporting groups
    Reporting group title
    SOF/VEL/VOX 12 Weeks
    Reporting group description
    		 SOF/VEL/VOX (400/100/100 mg) fixed-dose combination (FDC) tablet orally once daily for 12 weeks

    Reporting group title
    SOF/VEL 12 Weeks
    Reporting group description
    		 SOF/VEL (400/100 mg) FDC tablet orally once daily for 12 weeks

    Serious adverse events
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Total subjects affected by serious adverse events
         subjects affected / exposed
    4 / 182 (2.20%)
    4 / 151 (2.65%)
         number of deaths (all causes)
    1
    0
         number of deaths resulting from adverse events
    Injury, poisoning and procedural complications
    Road traffic accident
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 151 (0.66%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Toxicity to various agents
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 151 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 1
    0 / 0
    Cardiac disorders
    Angina unstable
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 151 (0.66%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac failure congestive
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 151 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nervous system disorders
    Cerebrovascular accident
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 151 (0.66%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Abdominal hernia
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 151 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Musculoskeletal and connective tissue disorders
    Intervertebral disc protrusion
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 151 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Lumbar spinal stenosis
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 151 (0.66%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    		 SOF/VEL/VOX 12 Weeks SOF/VEL 12 Weeks
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    111 / 182 (60.99%)
    88 / 151 (58.28%)
    Nervous system disorders
    Headache
         subjects affected / exposed
    50 / 182 (27.47%)
    43 / 151 (28.48%)
         occurrences all number
    55
    43
    General disorders and administration site conditions
    Fatigue
         subjects affected / exposed
    43 / 182 (23.63%)
    43 / 151 (28.48%)
         occurrences all number
    43
    45
    Asthenia
         subjects affected / exposed
    10 / 182 (5.49%)
    9 / 151 (5.96%)
         occurrences all number
    11
    9
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    36 / 182 (19.78%)
    7 / 151 (4.64%)
         occurrences all number
    41
    7
    Nausea
         subjects affected / exposed
    22 / 182 (12.09%)
    12 / 151 (7.95%)
         occurrences all number
    25
    13
    Abdominal pain
         subjects affected / exposed
    3 / 182 (1.65%)
    9 / 151 (5.96%)
         occurrences all number
    3
    12
    Psychiatric disorders
    Insomnia
         subjects affected / exposed
    12 / 182 (6.59%)
    3 / 151 (1.99%)
         occurrences all number
    12
    3
    Irritability
         subjects affected / exposed
    4 / 182 (2.20%)
    8 / 151 (5.30%)
         occurrences all number
    4
    8
    Musculoskeletal and connective tissue disorders
    Back pain
         subjects affected / exposed
    12 / 182 (6.59%)
    8 / 151 (5.30%)
         occurrences all number
    12
    8

    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
    For support, Contact us.
    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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