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Study to Evaluate the Efficacy and Safety of Filgotinib in Participants With Active Ankylosing Spondylitis Who Have an Inadequate Response to Biologic Disease-Modifying Antirheumatic Drug Therapy (SEALION1-IR)

Primary Purpose

Ankylosing Spondylitis

Status
Withdrawn
Phase
Phase 3
Locations
Study Type
Interventional
Intervention
Filgotinib
Placebo to Match Filgotinib
Sponsored by
Gilead Sciences
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Ankylosing Spondylitis

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Key Inclusion Criteria:

  • Ambulatory male or female individuals who are ≥ 18 years of age (≥ 20 years of age in Japan) on the day of signing informed consent
  • Have had inadequate response or intolerance to at least 1 and not more than 3 biologic disease-modifying antirheumatic drugs (bioDMARDs) administered for the treatment of ankylosing spondylitis (AS) or inflammatory arthritis
  • Have an established diagnosis of radiographic axial spondyloarthritis (SpA)/ AS by a rheumatologist (or other specialist with expertise in diagnosing AS)

  • Meet Assessment of SpondyloArthritis international Society (ASAS) classification criteria for axial SpA with radiographic sacroiliitis on imaging at screening as follows:

    • History of back pain ≥ 3 months and age at onset of back pain < 45 years, AND
    • Radiographic sacroiliitis Grade ≥ 2 bilaterally or Grade 3-4 unilaterally, AND
    • ≥ 1 SpA feature (refer to protocol; inflammatory back pain, arthritis, heel enthesitis, uveitis anterior, dactylitis, psoriasis, inflammatory bowel disease (IBD), good response to nonsteroidal anti-inflammatory drugs (NSAIDs), family history of SpA, historically positive human leukocyte antigen B27 (HLA-B27), elevated C-reactive protein (CRP))

  • Have active AS at screening and Day 1 as defined by:

    • Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) ≥ 4, AND
    • Spinal pain ≥ 4 (based on BASDAI question 2)
  • Have a history of inadequate response or intolerance to NSAIDs for the treatment of AS
  • If using allowed conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), NSAID, or corticosteroid therapy, must have been on stable doses (as outlined in protocol) prior to Day 1

Key Exclusion Criteria:

  • Prior exposure to a Janus kinase (JAK) inhibitor > 2 doses
  • Total ankylosis of the spine
  • Any active/recent infection, as specified in the protocol
  • Diagnosis of fibromyalgia

  • Any musculoskeletal disorder other than AS that would interfere with assessment of study parameters, as per judgement of investigator

    • Note: Prior history of reactive or other types of inflammatory arthritis is permitted if there is documentation of change in diagnosis to AS or additional diagnosis of AS
  • Any history of an inflammatory arthritis with onset age before 16 years old

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Sites / Locations

    Arms of the Study

    Arm 1

    Arm 2

    Arm 3

    Arm 4

    Arm 5

    Arm Type

    Experimental

    Experimental

    Placebo Comparator

    Experimental

    Experimental

    Arm Label

    Filgotinib 200 mg (Main Study - Blinded)

    Filgotinib 100 mg (Main Study - Blinded)

    Placebo (Main Study - Blinded)

    Filgotinib 200 mg (LTE)

    Filgotinib 100 mg (LTE)

    Arm Description

    Participants will receive filgotinib 200 mg + placebo to match (PTM) filgotinib 100 mg for up to 16 weeks.

    Participants will receive filgotinib 100 mg + PTM filgotinib 200 mg for up to 16 weeks.

    Participants will receive PTM filgotinib 200 mg + PTM filgotinib 100 mg for up to 16 weeks.

    Before study-wide unblinding, participants will receive filgotinib 200 mg + PTM filgotinib 100 mg. After study-wide unblinding, participants will receive filgotinib 200 mg.

    Before study-wide unblinding, participants will receive filgotinib 100 mg + PTM filgotinib 200 mg. After study-wide unblinding, participants will receive filgotinib 100 mg.

    Outcomes

    Primary Outcome Measures

    Proportion of Participants Who Achieve an Assessment of SpondyloArthritis international Society 40% Improvement (ASAS40) Response at Week 16
    The ASAS40 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from Bath Ankylosing Spondylitis Functional Index (BASFI) score), and inflammation (derived from morning stiffness questions from Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)). The ASAS40 is achieved if there is an improvement of ≥ 40% and ≥ 2 units in at least 3 domains on a scale of 10 with no worsening in the remaining domain.

    Secondary Outcome Measures

    Proportion of Participants Who Achieve an ASAS40 Response
    The ASAS40 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), and inflammation (derived from morning stiffness questions from BASDAI). The ASAS40 is achieved if there is an improvement of ≥ 40% and ≥ 2 units in at least 3 domains on a scale of 10 with no worsening in the remaining domain.
    Proportion of Participants Who Achieve an Assessment of SpondyloArthritis international Society 20% Improvement (ASAS20) Response
    The ASAS20 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), and inflammation (derived from morning stiffness questions from BASDAI).The ASAS20 is achieved if there is an improvement of ≥ 20% and ≥ 1 units in at least 3 domains on a scale of 10 with no worsening of ≥ 20% and ≥ 1 unit in the remaining domain.
    Proportion of Participants who achieve Ankylosing Spondylitis Disease Activity Score (ASDAS) Low Disease Activity (LDA) (ie, ASDAS < 2.1) at Week 16
    ASDAS is a composite score of 5 domains: total back pain, peripheral pain and/or swelling, duration of morning stiffness (derived from BASDAI questionnaire), participant's global assessment of disease activity, and serum high-sensitivity C-reactive protein (hsCRP). The ASDAS has a continuous scale from 0 with no defined upper end. A lower score indicate lower disease activity. ASDAS LDA is achieved when ASDAS < 2.1.
    Proportion of Participants Who Achieve an ASAS 5/6 Response
    The ASAS 5/6 is achieved when at least 20% improvement in at least 5 out of 6 domains. The 6 domains to use are: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), inflammation (derived from morning stiffness questions from BASDAI), lateral spinal flexion (Bath Ankylosing Spondylitis Metrology Index (BASMI) question 1), and hsCRP.
    Change from Baseline in the Individual Components of the ASAS Core Set
    ASAS core set consists of 6 assessment domains: (1) participant's global assessment of disease activity, (2) spinal pain (derived from the spinal pain questionnaire), (3) function (derived from BASFI score), (4) inflammation (derived from morning stiffness questions from BASDAI), (5) hsCRP, (for these 5 domains, a lower score indicate lower disease activity) and (6) lateral spinal flexion (BASMI question 1) (for this 6th domain; a higher score indicate lower disease activity).
    Proportion of Participants Who Achieve a Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) 50% Improvement Response
    BASDAI consists of 6 items asking participants to report their fatigue, spinal pain, peripheral arthritis, enthesitis, intensity, and duration of morning stiffness during the past week on a 0 to 10 numeric rating scale. The total score ranges 0-10; scores of 4 or greater suggest suboptimal control of disease. BASDAI 50% improvement is achieved when a decrease in BASDAI versus baseline by at least 50%.
    Change From Baseline in ASDAS
    ASDAS is a composite score of 5 domains: total back pain, peripheral pain and/or swelling, duration of morning stiffness (derived from BASDAI questionnaire), participant's global assessment of disease activity, and hsCRP. The ASDAS has a continuous scale from 0 with no defined upper end. A lower score indicates lower disease activity.
    Change From Baseline in BASDAI
    BASDAI consists of 6 items asking participants to report their fatigue, spinal pain, peripheral arthritis, enthesitis, intensity, and duration of morning stiffness during the past week on a 0 to 10 numeric rating scale. The total score ranges 0-10; scores of 4 or greater suggest suboptimal control of disease.
    Change From Baseline in Bath Ankylosing Spondylitis Functional Index (BASFI)
    The BASFI evaluates physical function in AS. The instrument consists of 10 items, rated on a 0 to 10 numeric rating scale (NRS), where 0 represents "easy" and 10 represents "impossible." Among the 10 items, 8 items evaluate basic activities of daily living (putting on socks, bending, reaching up, 2 items on getting up, standing, climbing steps, and looking over shoulder) and 2 items assess participants' ability to cope with everyday life (physically demanding activities and full day's activities). The total score ranges 0-10, and the higher the score, the higher the functional impairment.
    Change From Baseline in Bath Ankylosing Spondylitis Metrology Index (BASMI) (Linear Score)
    The BASMI combines 5 measures: lateral spinal flexion, tragus-to-wall distance, lumbar flexion (modified Schober index), maximal intermalleolar distance, and cervical rotation. The BASMI will be scored using a linear function that will quantify the mobility of the axial skeleton and allow for objective assessment of clinically significant changes in spinal movement. The total score ranges 0-10, and the higher the score, the more severe the participant's limitation on movement.
    Change From Baseline in Chest Expansion
    Chest expansion will be measured during maximal inspiration and maximal forced expiration at the fourth intercostal space.
    Change From Baseline in Occiput-to-wall Distance
    Occiput-to-wall distance is measured twice with the participant's heels and back rested against the wall. The chin should be at usual carrying level and the participant takes maximal effort to touch the head against the wall. The distance between the occiput and the wall is assessed and the better of the 2 assessments is to be reported.
    Change From Baseline in Maastricht Ankylosing Spondylitis Enthesitis Score (MASES), in Participants With Enthesitis at Baseline
    MASES is based on enthesitis grading of 13 body sites. The MASES is the sum of all site scores and ranges from 0-13. The higher the score, the higher the presence of enthesitis.
    Change From Baseline in Ankylosing Spondylitis Quality of Life (ASQoL)
    The ASQoL assesses health-related quality of life in AS participants. The questionnaire consists of 18 yes/no questions. A single point will be assigned for each "yes" response, resulting in a total score between 0 and 18, with lower scores indicating a better quality of life.
    Change From Baseline in Assessment of SpondyloArthritis international Society Health Index (ASAS HI)
    The ASAS HI is a 17-item patient-reported outcome measure to assess the impact of interventions for spondyloarthritis (SpA), including axial SpA. Each item consists of a question with a binary response of either "I agree" (scored as 1) or "I do not agree" (scored as 0). The scoring is performed by summing the number of "yes" answers. The total sum of the ASAS HI ranges 0-17, with a lower score indicating a better health status.
    Change From Baseline in Physical Component Summary (PCS) Score of the 36-Item Short-Form Survey (SF-36) Version 2
    The SF-36 Version 2 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health perceptions, mental health, social functioning, vitality, and 2 component scores (Mental Component Summary (MCS) score and PCS). MCS consists of social functioning, vitality, mental health, and role-emotional. PCS consists of physical functioning, bodily pain, role-physical, and general health perceptions. Each domain will be scored by summing the individual items and transforming the scores into a 0 to 100 scale with higher scores indicating better health status or functioning.
    Change From Baseline in Mental Component Summary (MCS) Score of the SF-36 Version 2
    The SF-36 Version 2 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health perceptions, mental health, social functioning, vitality, and 2 component scores (MCS and PCS). MCS consists of social functioning, vitality, mental health, and role-emotional. PCS consists of physical functioning, bodily pain, role-physical, and general health perceptions. Each domain will be scored by summing the individual items and transforming the scores into a 0 to 100 scale with higher scores indicating better health status or functioning.
    Change from Baseline in Functional Assessment of Chronic Illness Therapy - Fatigue Scale (FACIT-Fatigue)
    The FACIT-Fatigue measures an individual's level of fatigue during their usual daily activities during the past week. It consists of 13 questions on a 5-point Likert scale, with 0 indicating "not at all" and 4 indicating "very much". Negatively stated items are reversed and the total score ranges 0-52. Low scores indicate more severe fatigue than high scores.
    Change From Baseline in Work Productivity and Activity Impairment for Ankylosing Spondylitis (WPAI-AS)
    The WPAI-AS is a questionnaire developed to measure impairments in work activities in participants with AS. The questionnaire consists of 6 questions (currently employed, work time missed due to AS, work time missed due to other reasons, hours actually worked, degree AS affected productivity while working [0-10 NRS; with 0 indicating no effect and 10 indicating AS completely prevented the participant from working], and degree AS affected productivity in regular unpaid activities [0-10 NRS; with 0 indicating no effect and 10 indicating AS completely prevented the participant's daily activities]). The recall period for questions 2 through 6 is 7 days. Four main outcomes (expressed in percentages) can be obtained from the WPAI-AS: percentage of work time missed due to AS, percentage of impairment due to AS, percentage of overall work impairment due to AS, and percentage of activity impairment due to AS. Higher numbers indicate greater impairment and less productivity.
    Change From Baseline in EuroQol 5 Dimensions 5 Levels (EQ-5D-5L)
    The EQ-5D-5L is a standard measure of health-related quality of life. The tool consists of the EQ-5D-5L descriptive system and the EQ visual analogue scale (VAS). The descriptive part comprises 5 dimensions (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). Each of these 5 dimensions has 5 levels (no problem, slight problems, moderate problems, severe problems, and extreme problems). Results for each of the 5 dimensions are combined into a 5-digit number to describe the participant's health state. The VAS records the participant's health on a 0-100 mm VAS scale, with 0 indicating "the worst health you can imagine" and 100 indicating "the best health you can imagine." Higher scores of EQ VAS indicate better health.

    Full Information

    First Posted
    July 20, 2020
    Last Updated
    January 7, 2021
    Sponsor
    Gilead Sciences
    Collaborators
    Galapagos NV
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    1. Study Identification

    Unique Protocol Identification Number
    NCT04483687
    Brief Title
    Study to Evaluate the Efficacy and Safety of Filgotinib in Participants With Active Ankylosing Spondylitis Who Have an Inadequate Response to Biologic Disease-Modifying Antirheumatic Drug Therapy
    Acronym
    SEALION1-IR
    Official Title
    A Phase 3, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Filgotinib in Subjects With Active Ankylosing Spondylitis Who Have an Inadequate Response to Biologic Disease-Modifying Antirheumatic Drug Therapy
    Study Type
    Interventional

    2. Study Status

    Record Verification Date
    January 2021
    Overall Recruitment Status
    Withdrawn
    Why Stopped
    Development program terminated
    Study Start Date
    December 2020 (Anticipated)
    Primary Completion Date
    January 2023 (Anticipated)
    Study Completion Date
    September 2024 (Anticipated)

    3. Sponsor/Collaborators

    Responsible Party, by Official Title
    Sponsor
    Name of the Sponsor
    Gilead Sciences
    Collaborators
    Galapagos NV

    4. Oversight

    Studies a U.S. FDA-regulated Drug Product
    Yes
    Studies a U.S. FDA-regulated Device Product
    No
    Data Monitoring Committee
    Yes

    5. Study Description

    Brief Summary
    The primary objective of this study is to evaluate the effect of filgotinib versus placebo on signs and symptoms of active ankylosing spondylitis (AS), evaluated by Assessment of SpondyloArthritis international Society 40% improvement (ASAS40) response at Week 16 in participants with active AS who have an inadequate response to biologic disease-modifying antirheumatic drug therapy.
    Detailed Description
    The study consists of 2 parts: Main Study (screening through Week 16) and Long-Term Extension (LTE) (up to 1.5 years after Week 16). Participants who permanently discontinue treatment in the Main Study will not be eligible for the Long-Term extension.

    6. Conditions and Keywords

    Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
    Ankylosing Spondylitis

    7. Study Design

    Primary Purpose
    Treatment
    Study Phase
    Phase 3
    Interventional Study Model
    Parallel Assignment
    Masking
    ParticipantInvestigator
    Allocation
    Randomized
    Enrollment
    0 (Actual)

    8. Arms, Groups, and Interventions

    Arm Title
    Filgotinib 200 mg (Main Study - Blinded)
    Arm Type
    Experimental
    Arm Description
    Participants will receive filgotinib 200 mg + placebo to match (PTM) filgotinib 100 mg for up to 16 weeks.
    Arm Title
    Filgotinib 100 mg (Main Study - Blinded)
    Arm Type
    Experimental
    Arm Description
    Participants will receive filgotinib 100 mg + PTM filgotinib 200 mg for up to 16 weeks.
    Arm Title
    Placebo (Main Study - Blinded)
    Arm Type
    Placebo Comparator
    Arm Description
    Participants will receive PTM filgotinib 200 mg + PTM filgotinib 100 mg for up to 16 weeks.
    Arm Title
    Filgotinib 200 mg (LTE)
    Arm Type
    Experimental
    Arm Description
    Before study-wide unblinding, participants will receive filgotinib 200 mg + PTM filgotinib 100 mg. After study-wide unblinding, participants will receive filgotinib 200 mg.
    Arm Title
    Filgotinib 100 mg (LTE)
    Arm Type
    Experimental
    Arm Description
    Before study-wide unblinding, participants will receive filgotinib 100 mg + PTM filgotinib 200 mg. After study-wide unblinding, participants will receive filgotinib 100 mg.
    Intervention Type
    Drug
    Intervention Name(s)
    Filgotinib
    Other Intervention Name(s)
    GS-6034, GLPG0634
    Intervention Description
    Tablets administered orally once daily
    Intervention Type
    Drug
    Intervention Name(s)
    Placebo to Match Filgotinib
    Intervention Description
    Tablets administered orally once daily
    Primary Outcome Measure Information:
    Title
    Proportion of Participants Who Achieve an Assessment of SpondyloArthritis international Society 40% Improvement (ASAS40) Response at Week 16
    Description
    The ASAS40 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from Bath Ankylosing Spondylitis Functional Index (BASFI) score), and inflammation (derived from morning stiffness questions from Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)). The ASAS40 is achieved if there is an improvement of ≥ 40% and ≥ 2 units in at least 3 domains on a scale of 10 with no worsening in the remaining domain.
    Time Frame
    Week 16
    Secondary Outcome Measure Information:
    Title
    Proportion of Participants Who Achieve an ASAS40 Response
    Description
    The ASAS40 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), and inflammation (derived from morning stiffness questions from BASDAI). The ASAS40 is achieved if there is an improvement of ≥ 40% and ≥ 2 units in at least 3 domains on a scale of 10 with no worsening in the remaining domain.
    Time Frame
    Up to Week 12
    Title
    Proportion of Participants Who Achieve an Assessment of SpondyloArthritis international Society 20% Improvement (ASAS20) Response
    Description
    The ASAS20 calculation involves the analysis of 4 domains: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), and inflammation (derived from morning stiffness questions from BASDAI).The ASAS20 is achieved if there is an improvement of ≥ 20% and ≥ 1 units in at least 3 domains on a scale of 10 with no worsening of ≥ 20% and ≥ 1 unit in the remaining domain.
    Time Frame
    Up to Week 16
    Title
    Proportion of Participants who achieve Ankylosing Spondylitis Disease Activity Score (ASDAS) Low Disease Activity (LDA) (ie, ASDAS < 2.1) at Week 16
    Description
    ASDAS is a composite score of 5 domains: total back pain, peripheral pain and/or swelling, duration of morning stiffness (derived from BASDAI questionnaire), participant's global assessment of disease activity, and serum high-sensitivity C-reactive protein (hsCRP). The ASDAS has a continuous scale from 0 with no defined upper end. A lower score indicate lower disease activity. ASDAS LDA is achieved when ASDAS < 2.1.
    Time Frame
    Week 16
    Title
    Proportion of Participants Who Achieve an ASAS 5/6 Response
    Description
    The ASAS 5/6 is achieved when at least 20% improvement in at least 5 out of 6 domains. The 6 domains to use are: participant's global assessment of disease activity, spinal pain (derived from the spinal pain questionnaire), function (derived from BASFI score), inflammation (derived from morning stiffness questions from BASDAI), lateral spinal flexion (Bath Ankylosing Spondylitis Metrology Index (BASMI) question 1), and hsCRP.
    Time Frame
    Up to Week 16
    Title
    Change from Baseline in the Individual Components of the ASAS Core Set
    Description
    ASAS core set consists of 6 assessment domains: (1) participant's global assessment of disease activity, (2) spinal pain (derived from the spinal pain questionnaire), (3) function (derived from BASFI score), (4) inflammation (derived from morning stiffness questions from BASDAI), (5) hsCRP, (for these 5 domains, a lower score indicate lower disease activity) and (6) lateral spinal flexion (BASMI question 1) (for this 6th domain; a higher score indicate lower disease activity).
    Time Frame
    Baseline and up to Week 16
    Title
    Proportion of Participants Who Achieve a Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) 50% Improvement Response
    Description
    BASDAI consists of 6 items asking participants to report their fatigue, spinal pain, peripheral arthritis, enthesitis, intensity, and duration of morning stiffness during the past week on a 0 to 10 numeric rating scale. The total score ranges 0-10; scores of 4 or greater suggest suboptimal control of disease. BASDAI 50% improvement is achieved when a decrease in BASDAI versus baseline by at least 50%.
    Time Frame
    Up to Week 16
    Title
    Change From Baseline in ASDAS
    Description
    ASDAS is a composite score of 5 domains: total back pain, peripheral pain and/or swelling, duration of morning stiffness (derived from BASDAI questionnaire), participant's global assessment of disease activity, and hsCRP. The ASDAS has a continuous scale from 0 with no defined upper end. A lower score indicates lower disease activity.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in BASDAI
    Description
    BASDAI consists of 6 items asking participants to report their fatigue, spinal pain, peripheral arthritis, enthesitis, intensity, and duration of morning stiffness during the past week on a 0 to 10 numeric rating scale. The total score ranges 0-10; scores of 4 or greater suggest suboptimal control of disease.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Bath Ankylosing Spondylitis Functional Index (BASFI)
    Description
    The BASFI evaluates physical function in AS. The instrument consists of 10 items, rated on a 0 to 10 numeric rating scale (NRS), where 0 represents "easy" and 10 represents "impossible." Among the 10 items, 8 items evaluate basic activities of daily living (putting on socks, bending, reaching up, 2 items on getting up, standing, climbing steps, and looking over shoulder) and 2 items assess participants' ability to cope with everyday life (physically demanding activities and full day's activities). The total score ranges 0-10, and the higher the score, the higher the functional impairment.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Bath Ankylosing Spondylitis Metrology Index (BASMI) (Linear Score)
    Description
    The BASMI combines 5 measures: lateral spinal flexion, tragus-to-wall distance, lumbar flexion (modified Schober index), maximal intermalleolar distance, and cervical rotation. The BASMI will be scored using a linear function that will quantify the mobility of the axial skeleton and allow for objective assessment of clinically significant changes in spinal movement. The total score ranges 0-10, and the higher the score, the more severe the participant's limitation on movement.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Chest Expansion
    Description
    Chest expansion will be measured during maximal inspiration and maximal forced expiration at the fourth intercostal space.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Occiput-to-wall Distance
    Description
    Occiput-to-wall distance is measured twice with the participant's heels and back rested against the wall. The chin should be at usual carrying level and the participant takes maximal effort to touch the head against the wall. The distance between the occiput and the wall is assessed and the better of the 2 assessments is to be reported.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Maastricht Ankylosing Spondylitis Enthesitis Score (MASES), in Participants With Enthesitis at Baseline
    Description
    MASES is based on enthesitis grading of 13 body sites. The MASES is the sum of all site scores and ranges from 0-13. The higher the score, the higher the presence of enthesitis.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Ankylosing Spondylitis Quality of Life (ASQoL)
    Description
    The ASQoL assesses health-related quality of life in AS participants. The questionnaire consists of 18 yes/no questions. A single point will be assigned for each "yes" response, resulting in a total score between 0 and 18, with lower scores indicating a better quality of life.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Assessment of SpondyloArthritis international Society Health Index (ASAS HI)
    Description
    The ASAS HI is a 17-item patient-reported outcome measure to assess the impact of interventions for spondyloarthritis (SpA), including axial SpA. Each item consists of a question with a binary response of either "I agree" (scored as 1) or "I do not agree" (scored as 0). The scoring is performed by summing the number of "yes" answers. The total sum of the ASAS HI ranges 0-17, with a lower score indicating a better health status.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Physical Component Summary (PCS) Score of the 36-Item Short-Form Survey (SF-36) Version 2
    Description
    The SF-36 Version 2 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health perceptions, mental health, social functioning, vitality, and 2 component scores (Mental Component Summary (MCS) score and PCS). MCS consists of social functioning, vitality, mental health, and role-emotional. PCS consists of physical functioning, bodily pain, role-physical, and general health perceptions. Each domain will be scored by summing the individual items and transforming the scores into a 0 to 100 scale with higher scores indicating better health status or functioning.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Mental Component Summary (MCS) Score of the SF-36 Version 2
    Description
    The SF-36 Version 2 is a health-related survey that assesses participant's quality of life and consists of 36 questions covering 8 health domains: physical functioning, bodily pain, role limitations due to physical problems and emotional problems, general health perceptions, mental health, social functioning, vitality, and 2 component scores (MCS and PCS). MCS consists of social functioning, vitality, mental health, and role-emotional. PCS consists of physical functioning, bodily pain, role-physical, and general health perceptions. Each domain will be scored by summing the individual items and transforming the scores into a 0 to 100 scale with higher scores indicating better health status or functioning.
    Time Frame
    Baseline and up to Week 16
    Title
    Change from Baseline in Functional Assessment of Chronic Illness Therapy - Fatigue Scale (FACIT-Fatigue)
    Description
    The FACIT-Fatigue measures an individual's level of fatigue during their usual daily activities during the past week. It consists of 13 questions on a 5-point Likert scale, with 0 indicating "not at all" and 4 indicating "very much". Negatively stated items are reversed and the total score ranges 0-52. Low scores indicate more severe fatigue than high scores.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in Work Productivity and Activity Impairment for Ankylosing Spondylitis (WPAI-AS)
    Description
    The WPAI-AS is a questionnaire developed to measure impairments in work activities in participants with AS. The questionnaire consists of 6 questions (currently employed, work time missed due to AS, work time missed due to other reasons, hours actually worked, degree AS affected productivity while working [0-10 NRS; with 0 indicating no effect and 10 indicating AS completely prevented the participant from working], and degree AS affected productivity in regular unpaid activities [0-10 NRS; with 0 indicating no effect and 10 indicating AS completely prevented the participant's daily activities]). The recall period for questions 2 through 6 is 7 days. Four main outcomes (expressed in percentages) can be obtained from the WPAI-AS: percentage of work time missed due to AS, percentage of impairment due to AS, percentage of overall work impairment due to AS, and percentage of activity impairment due to AS. Higher numbers indicate greater impairment and less productivity.
    Time Frame
    Baseline and up to Week 16
    Title
    Change From Baseline in EuroQol 5 Dimensions 5 Levels (EQ-5D-5L)
    Description
    The EQ-5D-5L is a standard measure of health-related quality of life. The tool consists of the EQ-5D-5L descriptive system and the EQ visual analogue scale (VAS). The descriptive part comprises 5 dimensions (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). Each of these 5 dimensions has 5 levels (no problem, slight problems, moderate problems, severe problems, and extreme problems). Results for each of the 5 dimensions are combined into a 5-digit number to describe the participant's health state. The VAS records the participant's health on a 0-100 mm VAS scale, with 0 indicating "the worst health you can imagine" and 100 indicating "the best health you can imagine." Higher scores of EQ VAS indicate better health.
    Time Frame
    Baseline and up to Week 16

    10. Eligibility

    Sex
    All
    Minimum Age & Unit of Time
    18 Years
    Accepts Healthy Volunteers
    No
    Eligibility Criteria
    Key Inclusion Criteria: Ambulatory male or female individuals who are ≥ 18 years of age (≥ 20 years of age in Japan) on the day of signing informed consent Have had inadequate response or intolerance to at least 1 and not more than 3 biologic disease-modifying antirheumatic drugs (bioDMARDs) administered for the treatment of ankylosing spondylitis (AS) or inflammatory arthritis Have an established diagnosis of radiographic axial spondyloarthritis (SpA)/ AS by a rheumatologist (or other specialist with expertise in diagnosing AS) Meet Assessment of SpondyloArthritis international Society (ASAS) classification criteria for axial SpA with radiographic sacroiliitis on imaging at screening as follows: History of back pain ≥ 3 months and age at onset of back pain < 45 years, AND Radiographic sacroiliitis Grade ≥ 2 bilaterally or Grade 3-4 unilaterally, AND ≥ 1 SpA feature (refer to protocol; inflammatory back pain, arthritis, heel enthesitis, uveitis anterior, dactylitis, psoriasis, inflammatory bowel disease (IBD), good response to nonsteroidal anti-inflammatory drugs (NSAIDs), family history of SpA, historically positive human leukocyte antigen B27 (HLA-B27), elevated C-reactive protein (CRP)) Have active AS at screening and Day 1 as defined by: Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) ≥ 4, AND Spinal pain ≥ 4 (based on BASDAI question 2) Have a history of inadequate response or intolerance to NSAIDs for the treatment of AS If using allowed conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), NSAID, or corticosteroid therapy, must have been on stable doses (as outlined in protocol) prior to Day 1 Key Exclusion Criteria: Prior exposure to a Janus kinase (JAK) inhibitor > 2 doses Total ankylosis of the spine Any active/recent infection, as specified in the protocol Diagnosis of fibromyalgia Any musculoskeletal disorder other than AS that would interfere with assessment of study parameters, as per judgement of investigator Note: Prior history of reactive or other types of inflammatory arthritis is permitted if there is documentation of change in diagnosis to AS or additional diagnosis of AS Any history of an inflammatory arthritis with onset age before 16 years old Note: Other protocol defined Inclusion/Exclusion criteria may apply.
    Overall Study Officials:
    First Name & Middle Initial & Last Name & Degree
    Gilead Study Director
    Organizational Affiliation
    Gilead Sciences
    Official's Role
    Study Director

    12. IPD Sharing Statement

    Plan to Share IPD
    No

    Learn more about this trial

    Study to Evaluate the Efficacy and Safety of Filgotinib in Participants With Active Ankylosing Spondylitis Who Have an Inadequate Response to Biologic Disease-Modifying Antirheumatic Drug Therapy

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