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Long-Term Safety and Efficacy Study of Peginterferon Beta-1a

A Dose-Frequency Blinded, Multicenter, Extension Study to Determine the Long-Term Safety and Efficacy of PEGylated Interferon Beta-1a (BIIB017) in Subjects With Relapsing Multiple Sclerosis

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01332019
Acronym
ATTAIN
Enrollment
1077
Registered
2011-04-08
Start date
2011-04-30
Completion date
2015-10-31
Last updated
2017-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Relapsing Multiple Sclerosis

Keywords

Subcutaneous, Extension, Interferon, MS, PEGylated, Injectable, SC, PEG, peginterferon beta-1a, Relapsing

Brief summary

The primary objective of this study is to evaluate the long-term safety and tolerability of peginterferon beta-1a (BIIB017) in participants originally treated in Study 105MS301 (NCT00906399) who continue peginterferon beta-1a treatment. The secondary objective of this study is to describe long-term multiple sclerosis (MS) outcomes in participants originally treated in Study 105MS301 (NCT00906399) who continue peginterferon beta-1a treatment.

Interventions

Administered as specified in the treatment arm

Sponsors

Biogen
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * Must have completed the study treatment and visit schedule through Week 96 in Study 105MS301 (NCT00906399). Key

Exclusion criteria

* Subjects exceeding more than 6 weeks since completion of the Week 96 visit of Study 105MS301 (NCT00906399). * Subjects with any clinically significant laboratory abnormalities, malignancies, cardiac, endocrinologic, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, renal, or other major disease * Pregnant or nursing women. NOTE: Other protocol-defined Inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsup to 4 yearsAE: any untoward medical occurrence that did not necessarily have a causal relationship with study treatment. SAE: any untoward medical occurrence that at any dose: resulted in death; in the view of the Investigator, placed the participant at immediate risk of death (a life threatening event); required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity; resulted in a congenital anomaly/birth defect; any other medically important event that, in the opinion of the Investigator, could have jeopardized the participant or may have required intervention to prevent one of the other outcomes listed in the definition above. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing.
Number of Participants With Potentially Clinically Significant Hematology Laboratory Abnormalitiesup to 4 yearsData collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing.
Number of Participants With Shifts From Baseline: Liver Function Laboratory ValuesBaseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 yearsShift to low includes normal to low, high to low, and unknown to low. Shift to high includes normal to high, low to high, and unknown to high. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. ALT=alanine aminotransferase; AST=aspartate aminotransferase; GGT=gamma-glutamyl transferase.
Number of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBaseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 yearsShift to low includes normal to low, high to low, and unknown to low. Shift to high includes normal to high, low to high, and unknown to high. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. TSH=thyroid stimulating hormone.
Number of Participants With Shifts From Baseline: UrinalysisBaseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 yearsShift to low includes normal to low, high to low, and unknown to low. Shift to high/positive includes normal to high/positive, low to high/positive, negative to high/positive, and unknown to high/positive. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. Pos=positive; RBC=red blood cells; WBC=white blood cells.

Secondary

MeasureTime frameDescription
Number of New Active LesionsWeek 48, Week 96The number of new active lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Number of New T1 Hypointense LesionsWeek 48, Week 96The total number of new T1 hypointense lesions as assessed by MRI.
Number of Gd-Enhancing LesionsBaseline (start of 105MS302), Week 48, Week 96The number of Gd-enhancing lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Volume of T2 Hyperintense LesionsBaseline (start of 105MS302), Week 48, Week 96The volume of T2 hyperintense lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Volume of T1 Hypointense LesionsBaseline (start of 105MS302), Week 48, Week 96The volume of T1 hypointense lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Volume of Gd-Enhancing LesionsBaseline (start of 105MS302), Week 48, Week 96The volume of Gd-enhancing lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Percentage Change of Whole Brain VolumeBaseline (start of 105MS302), Week 48, Week 96Percentage change of whole brain volume as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Change From Baseline in EQ-5D Visual Analogue Scale (VAS)Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168The EQ-5D VAS records the participant's self-rated health on a scale from 0-100 where 100 is the 'best imaginable health state' and 0 is the 'worst imaginable health state.' The scale was normalized to a scale of 0 to 1, with higher values indicating a better health state. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Change From Baseline in Expanded Disability Status Scale (EDSS)Baseline (start of 105MS302), Weeks 12, 24, 48, 72, 96, 120, 144, 168Change from Baseline in disability as measured by the Expanded Disability Status Scale (EDSS). The EDSS measures the disability status of people with multiple sclerosis on a scale that ranges from 0 to 10. The range of main categories include (0) = normal neurologic exam; to (5) = ambulatory without aid or rest for 200 meters; disability severe enough to impair full daily activities; to (10) = death due to MS. Data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Time to Sustained Disability ProgressionWeeks 12, 24, 28, 72, 96, 120, 144, 168Estimated proportion of participants with progression and time to progression based on the Kaplan-Meier product limit method. Sustained disability progression is defined as: at least a 1.0 point increase on the EDSS from 105MS302 baseline EDSS ≥ 1.0 that is sustained for 24 weeks, or at least a 1.5 point increase on the EDSS from 105MS302 baseline EDSS = 0 that is sustained for 24 weeks. The EDSS measures the disability status of people with multiple sclerosis on a scale that ranges from 0 to 10. The range of main categories include (0) = normal neurologic exam; to (5) = ambulatory without aid or rest for 200 meters; disability severe enough to impair full daily activities; to (10) = death due to MS. Participants were censored at the time of withdrawal/switch/A3 effective date if they withdrew from study, switched to alternative MS medication, or Amendment 3 took effect without a progression.
Change From Baseline in Symbol Digit Modalities Test (SDMT)Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168SDMT is a screening test for cognitive impairment. Participants are given 90 seconds in which to pair specific numbers with given geometric figures using a key. Scores range from 0 (worst) to 110 (best).
Change From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreBaseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168The 29-item MSIS-29 is a disease-specific participant-reported outcome measure that has been developed and validated to examine the physical and psychological impact of MS from a patient's perspective; it measures 20 physical items and 9 psychological items. Responses use a 5-point Likert scale ranging from 1 to 5. All questions are to be answered. The physical well being assessment portion of the MSIS-29 consists of 20 questions in which participants rate the impact of MS on their day-to-day life during the past two weeks from 1=no impact to 5=extreme impact for a total score of 20-100. A lower total score indicates less physically-related impact while a higher total score indicates greater physically-related impact on a participant's functioning. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Change From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168The SF-12 is a multipurpose short form survey with 12 questions, all selected from the SF-36 Health Survey. The questions were combined, scored, and weighted to create two scales that provide glimpses into mental and physical functioning and overall health-related-quality of life. MCS computed using the scores of 12 questions and range from 0 to 100, where a 0 score indicates the lowest level of health and 100 indicates the highest level of health. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Change From Baseline in SF-12 Physical Component Score (PCS)Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168The SF-12 is a multipurpose short form survey with 12 questions, all selected from the SF-36 Health Survey. The questions were combined, scored, and weighted to create two scales that provide glimpses into mental and physical functioning and overall health-related-quality of life. PCS was computed using the scores of 12 questions and range from 0 to 100, where a 0 score indicates the lowest level of health and 100 indicates the highest level of health. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Number of Relapses Requiring IV Steroid Useup to 4 yearsObserved data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How tolerable or intolerable do you find the medication? answers were numerically rated from 1 (extremely intolerable) to 10 (extremely tolerable). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How convenient or inconvenient is it to take your medication as instructed? answers were numerically rated from 1 (extremely inconvenient) to 10 (extremely convenient). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How convenient or inconvenient is it to take your medication every 2 weeks? answers were numerically rated from 1 (extremely inconvenient) to 10 (extremely convenient). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Overall, how satisfied or dissatisfied are you with this medication? answers were numerically rated from 1 (extremely dissatisfied) to 10 (extremely satisfied). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How satisfied or dissatisfied are you with the injection frequency (every 2 weeks)? answers were numerically rated from 1 (extremely dissatisfied) to 10 (extremely satisfied). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How likely would you be to continue to use this medication? answers were numerically rated from 1 (extremely unlikely) to 10 (extremely likely). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This medication makes it easy for me to carry out my daily responsibilities (ie, going to work, doing household chores or caring for my family), answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement The twice a month dosing makes it more convenient for me to travel/vacation, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement The twice a month dosing enables me to be more spontaneous and flexible, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This medication improves my self-confidence and self-reliance, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement I am satisfied with the dosing frequency (2 times per month) of this medication answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Over the past 4 weeks, did you miss any of your injections? answer choices were given as none missed, miss 1 injection, or miss 2 injections. Data after Amendment 3 took effect are excluded.
Summary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1, Year 2, Year 3Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Main reason for missed injections? answer choices were given as medication side effects, injection pain, forget to take medication, tired of taking injections, don't think medication is working, or other. Data after Amendment 3 took effect are excluded.
Change From Baseline in Euro Quality of Life (EQ-5D) Index ScoreBaseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168The EQ-5D is a participant-answered questionnaire scoring 5 dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Scores of 1, 2, or 3 are possible responses for each of 5 questions (1=no problems, 2=some problems, 3=severe problems). A scoring formula developed by the EuroQol Group is then used to assign utility values for each participant's Health State Profile. A summary index score (EQ-5D index score) is derived from the 5 questions by conversion with this scoring formula and a table of scores. EQ-5D Summary Index values ranged from -0.6 (worst health state) to 1.00 (perfect health state). Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Annualized Relapse Rate (ARR)up to 4 yearsRelapses are defined as new or recurrent neurologic symptoms not associated with fever or infection, lasting at least 24 hours, and accompanied by new objective neurological findings upon examination by the examining neurologist. The annualized relapse rate is calculated as the total number of relapses occurred during the period for all participants, divided by the total number of person-years followed in the period.
Number of MS-Related Hospitalizationsup to 4 yearsObserved data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.
Percentage of Participants Who RelapsedUp to 4 yearsRelapses are defined as new or recurrent neurologic symptoms not associated with fever or infection, lasting at least 24 hours, and accompanied by new objective neurological findings upon examination by the examining neurologist. New or recurrent neurologic symptoms that occur less than 30 days following the onset of a relapse were considered part of the same relapse. Participants who did not experience a relapse prior to switching to alternative MS medications, withdrew from study, or Amendment 3 (A3) took effect were censored at the time of switch/withdrawal/A3 effective date.
Number of New or Newly Enlarging T2 Hyperintense LesionsWeek 48, Week 96The total number of new or newly enlarging T2 hyperintense lesions (from Study 105MS302 Baseline) as assessed by magnetic resonance imaging (MRI). Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Countries

Belgium, Bulgaria, Canada, Chile, Colombia, Croatia, Czechia, Estonia, France, Georgia, Germany, Greece, India, Latvia, Mexico, Netherlands, New Zealand, Peru, Poland, Romania, Russia, Serbia, Spain, Ukraine, United Kingdom, United States

Participant flow

Recruitment details

Study 105MS302 (NCT01332019) is an extension study and includes participants previously randomized to Study 105MS301 (NCT00906399). Only participants in Study 105MS301 who completed the study treatment and visit schedule through Week 96 were eligible for entry into this study.

Pre-assignment details

Participants continued BIIB017 at the same dosage regimen they were following during treatment year 2 of Study 105MS301: BIIB017 125 μg subcutaneously (SC) every 2 weeks (Q2W) or every 4 weeks (Q4W). A major change in study design was introduced in Amendment 3 of the protocol, which switched all ongoing subjects dosing Q4W to dosing Q2W.

Participants by arm

ArmCount
BIIB017 Q4W
125 µg BIIB017 administered by SC injection Q4W for at least 2 years and up to 4 years.
529
BIIB017 Q2W
125 µg BIIB017 administered by SC injection Q2W for at least 2 years and up to 4 years.
547
Total1,076

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event1322
Overall StudyDeath21
Overall StudyLost to Follow-up47
Overall StudyOther1618
Overall StudyPhysician Decision43
Overall StudyWas Not Dosed10
Overall StudyWithdrawal by Subject7371

Baseline characteristics

CharacteristicBIIB017 Q4WBIIB017 Q2WTotal
Age, Continuous38.1 years
STANDARD_DEVIATION 9.95
38.7 years
STANDARD_DEVIATION 9.59
38.4 years
STANDARD_DEVIATION 9.77
Age, Customized
20-29 years
131 participants107 participants238 participants
Age, Customized
30-39 years
165 participants180 participants345 participants
Age, Customized
40-49 years
150 participants172 participants322 participants
Age, Customized
50-59 years
80 participants83 participants163 participants
Age, Customized
60-65 years
3 participants5 participants8 participants
Gender
Female
378 Participants397 Participants775 Participants
Gender
Male
151 Participants150 Participants301 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
435 / 529438 / 547
serious
Total, serious adverse events
114 / 52991 / 547

Outcome results

Primary

Number of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEs

AE: any untoward medical occurrence that did not necessarily have a causal relationship with study treatment. SAE: any untoward medical occurrence that at any dose: resulted in death; in the view of the Investigator, placed the participant at immediate risk of death (a life threatening event); required inpatient hospitalization or prolongation of existing hospitalization; resulted in persistent or significant disability/incapacity; resulted in a congenital anomaly/birth defect; any other medically important event that, in the opinion of the Investigator, could have jeopardized the participant or may have required intervention to prevent one of the other outcomes listed in the definition above. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing.

Time frame: up to 4 years

Population: Safety population: all participants who received at least 1 dose of study drug. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsAny event471 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsSerious event113 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsEvent related to study treatment400 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsDiscontinuing study treatment due to an event18 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsModerate or severe event343 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsWithdrawing from study due to an event14 participants
BIIB017 Q4WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsSevere event74 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsWithdrawing from study due to an event23 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsSevere event73 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsAny event478 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsEvent related to study treatment399 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsSerious event90 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsDiscontinuing study treatment due to an event26 participants
BIIB017 Q2WNumber of Participants Experiencing Adverse Events (AEs) Serious AEs, and Discontinuations Due to AEsModerate or severe event348 participants
Primary

Number of Participants With Potentially Clinically Significant Hematology Laboratory Abnormalities

Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing.

Time frame: up to 4 years

Population: Safety population: all participants who received at least 1 dose of study drug and at least 1 post-baseline value for given parameter.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils < 1.5*10^9/L31 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes < 0.8*10^9/L41 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils ≤ 1*10^9/L8 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes < 0.5*10^9/L2 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils ≥ 12*10^9/L18 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes > 12*10^9/L0 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils ≥ 12*10^9/L18 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesPlatelet count ≤ 100*10^9/L3 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils < 1.5*10^9/L31 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesRed blood cells ≤ 3.3*10^12/L1 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils ≤ 1*10^9/L8 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesRed blood cells ≥ 6.8*10^12/L0 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesWhite blood cells ≥ 16.0*10^9/L13 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesHemoglobin ≤ 100 g/L33 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesPlatelet count ≥ 600*10^9/L2 participants
BIIB017 Q4WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesWhite blood cells < 3.0*10^9/L28 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesPlatelet count ≥ 600*10^9/L2 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils ≤ 1*10^9/L16 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils < 1.5*10^9/L84 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesSegmented neutrophils ≥ 12*10^9/L5 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils < 1.5*10^9/L83 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesHemoglobin ≤ 100 g/L35 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesPlatelet count ≤ 100*10^9/L11 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesWhite blood cells < 3.0*10^9/L86 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesWhite blood cells ≥ 16.0*10^9/L4 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes < 0.8*10^9/L62 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes < 0.5*10^9/L7 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesLymphocytes > 12*10^9/L0 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils ≤ 1*10^9/L15 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesTotal absolute neutrophils ≥ 12*10^9/L5 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesRed blood cells ≤ 3.3*10^12/L7 participants
BIIB017 Q2WNumber of Participants With Potentially Clinically Significant Hematology Laboratory AbnormalitiesRed blood cells ≥ 6.8*10^12/L0 participants
Primary

Number of Participants With Shifts From Baseline: Kidney Function and Other Blood Chemistry

Shift to low includes normal to low, high to low, and unknown to low. Shift to high includes normal to high, low to high, and unknown to high. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. TSH=thyroid stimulating hormone.

Time frame: Baseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 years

Population: Safety population: all participants who received at least 1 dose of study drug; n=number of participants whose baseline value was not low (or high) and who had at least 1 post-baseline value.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryPotassium: shift to low; n=527, 54413 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryCreatinine: shift to low; n=529, 5470 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryPotassium: shift to high; n=528, 54617 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBicarbonate: shift to low; n=523, 54049 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryChloride: shift to low; n=529, 5461 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBlood urea nitrogen: shift to low; n=529, 5460 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryChloride: shift to high; n=528, 5470 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBicarbonate: shift to high; n=529, 5440 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryGlucose: shift to low; n=522, 53954 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryCreatinine: shift to high; n=528, 54515 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryGlucose: shift to high; n=506, 513304 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistrySodium: shift to low; n=529, 5460 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryTSH: shift to low; n=515, 53347 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistrySodium: shift to high; n=524, 54439 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryTSH: shift to high; n=518, 53937 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBlood urea nitrogen: shift to high; n=527, 54316 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryTSH: shift to high; n=518, 53955 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryCreatinine: shift to low; n=529, 5471 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistrySodium: shift to low; n=529, 5463 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBlood urea nitrogen: shift to low; n=529, 5461 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryCreatinine: shift to high; n=528, 5458 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBicarbonate: shift to low; n=523, 54064 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBicarbonate: shift to high; n=529, 5440 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistrySodium: shift to high; n=524, 54446 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryPotassium: shift to low; n=527, 54421 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryPotassium: shift to high; n=528, 54620 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryChloride: shift to low; n=529, 5462 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryChloride: shift to high; n=528, 5473 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryGlucose: shift to low; n=522, 53951 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryGlucose: shift to high; n=506, 513311 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryTSH: shift to low; n=515, 53330 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Kidney Function and Other Blood ChemistryBlood urea nitrogen: shift to high; n=527, 54320 participants
Primary

Number of Participants With Shifts From Baseline: Liver Function Laboratory Values

Shift to low includes normal to low, high to low, and unknown to low. Shift to high includes normal to high, low to high, and unknown to high. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. ALT=alanine aminotransferase; AST=aspartate aminotransferase; GGT=gamma-glutamyl transferase.

Time frame: Baseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 years

Population: Safety population: all participants who received at least 1 dose of study drug; n=number of participants whose baseline value was not low (or high) and who had at least 1 post-baseline value.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesALT: shift to low; n=528, 5463 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesGGT: shift to low; n=529, 54516 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesGGT: shift to high; n=512, 52873 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAlkaline phosphatase: shift to high; n=516, 53628 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesLactate dehydrogenase: shift to high; n=524, 54118 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesALT: shift to high; n=487, 497119 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAST: shift to low; n=528, 54610 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAST: shift to high; n=514, 53075 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesTotal bilirubin: shift to low; n=512, 51794 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesTotal bilirubin: shift to high; n=511, 53522 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAlkaline phosphatase: shift to low; n=522, 5434 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesLactate dehydrogenase: shift to low; n=529, 5470 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAlkaline phosphatase: shift to low; n=522, 5435 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAST: shift to high; n=514, 530110 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesGGT: shift to low; n=529, 5456 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAlkaline phosphatase: shift to high; n=516, 53626 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesGGT: shift to high; n=512, 52897 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesTotal bilirubin: shift to low; n=512, 51776 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesLactate dehydrogenase: shift to high; n=524, 54130 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesALT: shift to low; n=528, 5463 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesTotal bilirubin: shift to high; n=511, 53516 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesALT: shift to high; n=487, 497153 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesLactate dehydrogenase: shift to low; n=529, 5470 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: Liver Function Laboratory ValuesAST: shift to low; n=528, 5468 participants
Primary

Number of Participants With Shifts From Baseline: Urinalysis

Shift to low includes normal to low, high to low, and unknown to low. Shift to high/positive includes normal to high/positive, low to high/positive, negative to high/positive, and unknown to high/positive. For participants who switched to alternative MS medications, data after switch and 14 days after last dose of study treatment are excluded. Data collected after Amendment 3 took effect were excluded for participants enrolled into study 105MS302 on every 4 week dosing, but not excluded for participants enrolled on every 2 week dosing. Pos=positive; RBC=red blood cells; WBC=white blood cells.

Time frame: Baseline (BIIB017 Treatment Baseline from Study 105MS301) up to 4 years

Population: Safety population: all participants who received at least 1 dose of study drug; n=number of participants whose baseline value was not low or high/positive and who had at least 1 post-baseline value.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisKetones: shift to high/pos; n=510, 53064 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisGlucose: shift to high/pos; n=521, 54228 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisProtein: shift to high/pos; n=380, 391270 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysispH: shift to high/pos; n=528, 5476 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisRBC: shift to high/pos; n=419, 402110 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisSpecific gravity: shift to high/pos; n=528,54713 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisWBC: shift to high/pos; n=472, 495116 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisColor: shift to high/pos; n=516, 52933 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisBilirubin: shift to high/pos; n=529, 5470 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisSpecific gravity: shift to low; n=525, 5452 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisNitrite: shift to high/pos; n=508, 51984 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisBlood: shift to high/pos; n=469, 495159 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysisUrobilinogen: shift to high/pos; n=529, 5467 participants
BIIB017 Q4WNumber of Participants With Shifts From Baseline: UrinalysispH: shift to low; n=529, 5470 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisUrobilinogen: shift to high/pos; n=529, 54613 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisSpecific gravity: shift to low; n=525, 5451 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisSpecific gravity: shift to high/pos; n=528,5473 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysispH: shift to low; n=529, 5470 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysispH: shift to high/pos; n=528, 5474 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisColor: shift to high/pos; n=516, 52936 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisGlucose: shift to high/pos; n=521, 54225 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisKetones: shift to high/pos; n=510, 53073 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisProtein: shift to high/pos; n=380, 391277 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisRBC: shift to high/pos; n=419, 402106 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisWBC: shift to high/pos; n=472, 495130 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisBilirubin: shift to high/pos; n=529, 5471 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisNitrite: shift to high/pos; n=508, 51994 participants
BIIB017 Q2WNumber of Participants With Shifts From Baseline: UrinalysisBlood: shift to high/pos; n=469, 495167 participants
Secondary

Annualized Relapse Rate (ARR)

Relapses are defined as new or recurrent neurologic symptoms not associated with fever or infection, lasting at least 24 hours, and accompanied by new objective neurological findings upon examination by the examining neurologist. The annualized relapse rate is calculated as the total number of relapses occurred during the period for all participants, divided by the total number of person-years followed in the period.

Time frame: up to 4 years

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment.

ArmMeasureValue (NUMBER)
BIIB017 Q4WAnnualized Relapse Rate (ARR)0.189 relapses per person-years
BIIB017 Q2WAnnualized Relapse Rate (ARR)0.142 relapses per person-years
Comparison: Based on negative binomial regression for each treatment group, with adjustment for EDSS (\<4 vs. \>=4), relapse rate (based on 1 year before 105MS301 and 105MS301), and age (\<40 vs. \>=40) at 105MS302 baseline.p-value: 0.020395% CI: [0.595, 0.957]negative binomial regression
Secondary

Change From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)

The SF-12 is a multipurpose short form survey with 12 questions, all selected from the SF-36 Health Survey. The questions were combined, scored, and weighted to create two scales that provide glimpses into mental and physical functioning and overall health-related-quality of life. MCS computed using the scores of 12 questions and range from 0 to 100, where a 0 score indicates the lowest level of health and 100 indicates the highest level of health. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Baseline; n=527, 54447.803 units on a scaleStandard Deviation 10.2111
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 24; n=514, 5350.396 units on a scaleStandard Deviation 7.5967
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 48; n=498, 5100.409 units on a scaleStandard Deviation 8.4442
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 72; n=474, 4910.242 units on a scaleStandard Deviation 9.3223
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 96; n=437, 452-0.141 units on a scaleStandard Deviation 9.4833
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 120; n=193, 205-1.223 units on a scaleStandard Deviation 10.4664
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 144; n=88, 980.346 units on a scaleStandard Deviation 8.6814
BIIB017 Q4WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 168; n=20, 26-0.451 units on a scaleStandard Deviation 8.8575
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 168; n=20, 260.294 units on a scaleStandard Deviation 9.7505
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Baseline; n=527, 54448.591 units on a scaleStandard Deviation 10.3624
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 96; n=437, 4520.014 units on a scaleStandard Deviation 8.8856
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 24; n=514, 535-0.734 units on a scaleStandard Deviation 8.3567
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 144; n=88, 980.110 units on a scaleStandard Deviation 8.0301
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 48; n=498, 510-0.690 units on a scaleStandard Deviation 8.3903
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 120; n=193, 2050.616 units on a scaleStandard Deviation 7.5313
BIIB017 Q2WChange From Baseline in 12-Item Short Form Health Survey (SF-12) Mental Component Score (MCS)Change at Week 72; n=474, 491-0.162 units on a scaleStandard Deviation 9.0676
Secondary

Change From Baseline in EQ-5D Visual Analogue Scale (VAS)

The EQ-5D VAS records the participant's self-rated health on a scale from 0-100 where 100 is the 'best imaginable health state' and 0 is the 'worst imaginable health state.' The scale was normalized to a scale of 0 to 1, with higher values indicating a better health state. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Baseline; n=527, 54277.07 units on a scaleStandard Deviation 17.623
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 24; n=511, 532-0.22 units on a scaleStandard Deviation 11.411
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 48; n=498, 508-0.81 units on a scaleStandard Deviation 12.828
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 72; n=472, 490-0.59 units on a scaleStandard Deviation 12.735
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 96; n=436, 450-1.10 units on a scaleStandard Deviation 14.266
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 120; n=193, 204-0.47 units on a scaleStandard Deviation 12.714
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 144; n=88, 97-0.31 units on a scaleStandard Deviation 14.247
BIIB017 Q4WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 168; n=21, 261.38 units on a scaleStandard Deviation 14.925
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 168; n=21, 260.46 units on a scaleStandard Deviation 12.602
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Baseline; n=527, 54277.33 units on a scaleStandard Deviation 18.348
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 96; n=436, 450-2.20 units on a scaleStandard Deviation 14.095
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 24; n=511, 532-0.98 units on a scaleStandard Deviation 12.064
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 144; n=88, 97-0.87 units on a scaleStandard Deviation 14.865
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 48; n=498, 508-0.93 units on a scaleStandard Deviation 12.719
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 120; n=193, 204-0.88 units on a scaleStandard Deviation 12.793
BIIB017 Q2WChange From Baseline in EQ-5D Visual Analogue Scale (VAS)Change at Week 72; n=472, 490-1.89 units on a scaleStandard Deviation 15.27
Secondary

Change From Baseline in Euro Quality of Life (EQ-5D) Index Score

The EQ-5D is a participant-answered questionnaire scoring 5 dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Scores of 1, 2, or 3 are possible responses for each of 5 questions (1=no problems, 2=some problems, 3=severe problems). A scoring formula developed by the EuroQol Group is then used to assign utility values for each participant's Health State Profile. A summary index score (EQ-5D index score) is derived from the 5 questions by conversion with this scoring formula and a table of scores. EQ-5D Summary Index values ranged from -0.6 (worst health state) to 1.00 (perfect health state). Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreBaseline; n=527, 5440.76 units on a scaleStandard Deviation 0.23
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 24; n=514, 5340.00 units on a scaleStandard Deviation 0.159
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 48; n=498, 510-0.01 units on a scaleStandard Deviation 0.159
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 72; n=472, 491-0.01 units on a scaleStandard Deviation 0.158
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 96; n=436, 452-0.01 units on a scaleStandard Deviation 0.156
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 120; n=193, 205-0.02 units on a scaleStandard Deviation 0.19
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 144; n=88, 980.00 units on a scaleStandard Deviation 0.169
BIIB017 Q4WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 168; n=21, 260.00 units on a scaleStandard Deviation 0.08
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 168; n=21, 260.02 units on a scaleStandard Deviation 0.137
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreBaseline; n=527, 5440.76 units on a scaleStandard Deviation 0.23
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 96; n=436, 452-0.01 units on a scaleStandard Deviation 0.195
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 24; n=514, 5340.00 units on a scaleStandard Deviation 0.171
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 144; n=88, 980.01 units on a scaleStandard Deviation 0.166
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 48; n=498, 5100.00 units on a scaleStandard Deviation 0.171
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 120; n=193, 2050.00 units on a scaleStandard Deviation 0.165
BIIB017 Q2WChange From Baseline in Euro Quality of Life (EQ-5D) Index ScoreChange at Week 72; n=472, 4910.00 units on a scaleStandard Deviation 0.179
Secondary

Change From Baseline in Expanded Disability Status Scale (EDSS)

Change from Baseline in disability as measured by the Expanded Disability Status Scale (EDSS). The EDSS measures the disability status of people with multiple sclerosis on a scale that ranges from 0 to 10. The range of main categories include (0) = normal neurologic exam; to (5) = ambulatory without aid or rest for 200 meters; disability severe enough to impair full daily activities; to (10) = death due to MS. Data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 12, 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 12; n=503, 5240.02 units on a scaleStandard Deviation 0.388
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 72; n=468, 4840.13 units on a scaleStandard Deviation 0.629
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 96; n=429, 4460.15 units on a scaleStandard Deviation 0.618
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Baseline; n=516, 5352.43 units on a scaleStandard Deviation 1.346
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 24; n=500, 5190.02 units on a scaleStandard Deviation 0.449
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 144; n=90, 980.23 units on a scaleStandard Deviation 0.72
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 120; n=187, 2050.19 units on a scaleStandard Deviation 0.7
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 168; n=21, 250.24 units on a scaleStandard Deviation 0.889
BIIB017 Q4WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 48; n=488, 4970.08 units on a scaleStandard Deviation 0.564
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 168; n=21, 250.18 units on a scaleStandard Deviation 0.454
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Baseline; n=516, 5352.35 units on a scaleStandard Deviation 1.299
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 12; n=503, 5240.00 units on a scaleStandard Deviation 0.45
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 24; n=500, 5190.00 units on a scaleStandard Deviation 0.486
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 48; n=488, 4970.03 units on a scaleStandard Deviation 0.51
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 96; n=429, 4460.09 units on a scaleStandard Deviation 0.563
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 120; n=187, 2050.10 units on a scaleStandard Deviation 0.538
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 144; n=90, 980.10 units on a scaleStandard Deviation 0.587
BIIB017 Q2WChange From Baseline in Expanded Disability Status Scale (EDSS)Change at Week 72; n=468, 4840.06 units on a scaleStandard Deviation 0.484
Secondary

Change From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical Score

The 29-item MSIS-29 is a disease-specific participant-reported outcome measure that has been developed and validated to examine the physical and psychological impact of MS from a patient's perspective; it measures 20 physical items and 9 psychological items. Responses use a 5-point Likert scale ranging from 1 to 5. All questions are to be answered. The physical well being assessment portion of the MSIS-29 consists of 20 questions in which participants rate the impact of MS on their day-to-day life during the past two weeks from 1=no impact to 5=extreme impact for a total score of 20-100. A lower total score indicates less physically-related impact while a higher total score indicates greater physically-related impact on a participant's functioning. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreBaseline; n=527, 54420.494 units on a scaleStandard Deviation 19.829
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 96; n=437, 4521.471 units on a scaleStandard Deviation 10.8997
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 48; n=498, 5100.462 units on a scaleStandard Deviation 10.7054
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 120; n=193, 2052.654 units on a scaleStandard Deviation 14.2983
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 144; n=88, 980.327 units on a scaleStandard Deviation 10.5888
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 24; n=513, 534-0.152 units on a scaleStandard Deviation 9.3332
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 168; n=20, 262.250 units on a scaleStandard Deviation 7.3292
BIIB017 Q4WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 72; n=474, 4910.937 units on a scaleStandard Deviation 11.5682
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 168; n=20, 26-0.288 units on a scaleStandard Deviation 13.5615
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreBaseline; n=527, 54420.218 units on a scaleStandard Deviation 19.0264
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 24; n=513, 5340.552 units on a scaleStandard Deviation 10.0147
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 48; n=498, 5100.545 units on a scaleStandard Deviation 10.6342
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 72; n=474, 4910.684 units on a scaleStandard Deviation 12.469
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 96; n=437, 4521.190 units on a scaleStandard Deviation 11.4005
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 144; n=88, 980.051 units on a scaleStandard Deviation 12.1417
BIIB017 Q2WChange From Baseline in Multiple Sclerosis Impact Scale (MSIS)-29 Physical ScoreChange at Week 120; n=193, 2050.116 units on a scaleStandard Deviation 10.4382
Secondary

Change From Baseline in SF-12 Physical Component Score (PCS)

The SF-12 is a multipurpose short form survey with 12 questions, all selected from the SF-36 Health Survey. The questions were combined, scored, and weighted to create two scales that provide glimpses into mental and physical functioning and overall health-related-quality of life. PCS was computed using the scores of 12 questions and range from 0 to 100, where a 0 score indicates the lowest level of health and 100 indicates the highest level of health. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Baseline; n=527, 54445.154 units on a scaleStandard Deviation 9.4474
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 24; n=514, 5350.138 units on a scaleStandard Deviation 6.0841
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 48; n=498, 510-0.351 units on a scaleStandard Deviation 6.1785
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 72; n=474, 491-0.270 units on a scaleStandard Deviation 6.6319
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 96; n=437, 452-0.150 units on a scaleStandard Deviation 6.6971
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 120; n=193, 205-0.118 units on a scaleStandard Deviation 7.8826
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 144; n=88, 98-0.256 units on a scaleStandard Deviation 5.7252
BIIB017 Q4WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 168; n=20, 26-1.558 units on a scaleStandard Deviation 7.6525
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 168; n=20, 260.152 units on a scaleStandard Deviation 7.5206
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Baseline; n=527, 54444.902 units on a scaleStandard Deviation 9.9312
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 96; n=437, 452-0.138 units on a scaleStandard Deviation 6.4453
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 24; n=514, 5350.337 units on a scaleStandard Deviation 5.7878
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 144; n=88, 980.118 units on a scaleStandard Deviation 6.783
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 48; n=498, 5100.214 units on a scaleStandard Deviation 5.8377
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 120; n=193, 2050.021 units on a scaleStandard Deviation 6.1354
BIIB017 Q2WChange From Baseline in SF-12 Physical Component Score (PCS)Change at Week 72; n=474, 491-0.169 units on a scaleStandard Deviation 6.3824
Secondary

Change From Baseline in Symbol Digit Modalities Test (SDMT)

SDMT is a screening test for cognitive impairment. Participants are given 90 seconds in which to pair specific numbers with given geometric figures using a key. Scores range from 0 (worst) to 110 (best).

Time frame: Baseline (start of 105MS302), Weeks 24, 48, 72, 96, 120, 144, 168

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 96; n=435, 450-0.340 units on a scaleStandard Deviation 8.7817
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 120; n=190, 203-1.305 units on a scaleStandard Deviation 8.9248
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Baseline; n=523, 54352.134 units on a scaleStandard Deviation 17.7653
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 24; n=508, 530-0.313 units on a scaleStandard Deviation 8.5862
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 48; n=493, 509-0.365 units on a scaleStandard Deviation 9.3557
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 72; n=472, 489-0.625 units on a scaleStandard Deviation 8.8037
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 144; n=88, 96-1.727 units on a scaleStandard Deviation 7.79
BIIB017 Q4WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 168; n=21, 25-4.000 units on a scaleStandard Deviation 10.4403
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 168; n=21, 25-3.840 units on a scaleStandard Deviation 13.4712
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 96; n=435, 450-0.231 units on a scaleStandard Deviation 9.3148
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 48; n=493, 509-0.864 units on a scaleStandard Deviation 8.6059
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 120; n=190, 203-1.099 units on a scaleStandard Deviation 9.5425
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 144; n=88, 96-0.906 units on a scaleStandard Deviation 10.8367
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Baseline; n=523, 54352.744 units on a scaleStandard Deviation 17.6994
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 72; n=472, 489-1.012 units on a scaleStandard Deviation 8.5038
BIIB017 Q2WChange From Baseline in Symbol Digit Modalities Test (SDMT)Change at Week 24; n=508, 530-1.106 units on a scaleStandard Deviation 8.1292
Secondary

Number of Gd-Enhancing Lesions

The number of Gd-enhancing lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WNumber of Gd-Enhancing LesionsBaseline; n=528, 5430.6 lesionsStandard Deviation 1.85
BIIB017 Q4WNumber of Gd-Enhancing LesionsWeek 48; n=481, 4930.7 lesionsStandard Deviation 2.07
BIIB017 Q4WNumber of Gd-Enhancing LesionsWeek 96; n=411, 4070.8 lesionsStandard Deviation 2.59
BIIB017 Q2WNumber of Gd-Enhancing LesionsBaseline; n=528, 5430.2 lesionsStandard Deviation 1.07
BIIB017 Q2WNumber of Gd-Enhancing LesionsWeek 48; n=481, 4930.2 lesionsStandard Deviation 1.42
BIIB017 Q2WNumber of Gd-Enhancing LesionsWeek 96; n=411, 4070.2 lesionsStandard Deviation 0.89
Comparison: Week 48p-value: 0.0012Regression, Logistic
Comparison: Week 96p-value: 0.0026Regression, Logistic
Secondary

Number of MS-Related Hospitalizations

Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: up to 4 years

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment

ArmMeasureValue (NUMBER)
BIIB017 Q4WNumber of MS-Related Hospitalizations113 hospitalizations
BIIB017 Q2WNumber of MS-Related Hospitalizations81 hospitalizations
Secondary

Number of New Active Lesions

The number of new active lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WNumber of New Active LesionsWeek 48; n=481, 4934.4 lesionsStandard Deviation 8.25
BIIB017 Q4WNumber of New Active LesionsWeek 96; n=411, 4069.0 lesionsStandard Deviation 16.88
BIIB017 Q2WNumber of New Active LesionsWeek 48; n=481, 4932.0 lesionsStandard Deviation 4.62
BIIB017 Q2WNumber of New Active LesionsWeek 96; n=411, 4063.9 lesionsStandard Deviation 9.47
Comparison: Week 48p-value: <0.000195% CI: [0.43, 0.68]negative binomial regression
Comparison: Week 96p-value: <0.000195% CI: [0.43, 0.71]negative binomial regression
Secondary

Number of New or Newly Enlarging T2 Hyperintense Lesions

The total number of new or newly enlarging T2 hyperintense lesions (from Study 105MS302 Baseline) as assessed by magnetic resonance imaging (MRI). Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WNumber of New or Newly Enlarging T2 Hyperintense LesionsWeek 96; n=411, 4078.9 lesionsStandard Deviation 16.64
BIIB017 Q4WNumber of New or Newly Enlarging T2 Hyperintense LesionsWeek 48; n=481, 4934.4 lesionsStandard Deviation 8.19
BIIB017 Q2WNumber of New or Newly Enlarging T2 Hyperintense LesionsWeek 48; n=481, 4931.9 lesionsStandard Deviation 4.5
BIIB017 Q2WNumber of New or Newly Enlarging T2 Hyperintense LesionsWeek 96; n=411, 4073.9 lesionsStandard Deviation 9.37
Comparison: Week 48p-value: <0.000195% CI: [0.41, 0.63]negative binomial regression
Comparison: Week 96p-value: <0.000195% CI: [0.39, 0.62]negative binomial regression
Secondary

Number of New T1 Hypointense Lesions

The total number of new T1 hypointense lesions as assessed by MRI.

Time frame: Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WNumber of New T1 Hypointense LesionsWeek 49; n=481, 4931.4 lesionsStandard Deviation 3.02
BIIB017 Q4WNumber of New T1 Hypointense LesionsWeek 96; n=411, 4062.8 lesionsStandard Deviation 5.92
BIIB017 Q2WNumber of New T1 Hypointense LesionsWeek 49; n=481, 4930.8 lesionsStandard Deviation 2.18
BIIB017 Q2WNumber of New T1 Hypointense LesionsWeek 96; n=411, 4061.5 lesionsStandard Deviation 4.14
Comparison: Week 48p-value: <0.0001Regression, Logistic
Comparison: Week 96p-value: <0.0001Regression, Logistic
Secondary

Number of Relapses Requiring IV Steroid Use

Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: up to 4 years

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment

ArmMeasureValue (NUMBER)
BIIB017 Q4WNumber of Relapses Requiring IV Steroid Use217 relapses
BIIB017 Q2WNumber of Relapses Requiring IV Steroid Use181 relapses
Secondary

Percentage Change of Whole Brain Volume

Percentage change of whole brain volume as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WPercentage Change of Whole Brain VolumeChange at Week 48; n=402, 418-0.522 percentage changeStandard Deviation 0.6205
BIIB017 Q4WPercentage Change of Whole Brain VolumeChange at Week 96; n=365, 358-0.835 percentage changeStandard Deviation 1.0785
BIIB017 Q2WPercentage Change of Whole Brain VolumeChange at Week 48; n=402, 418-0.453 percentage changeStandard Deviation 0.8127
BIIB017 Q2WPercentage Change of Whole Brain VolumeChange at Week 96; n=365, 358-0.788 percentage changeStandard Deviation 1.1912
Secondary

Percentage of Participants Who Relapsed

Relapses are defined as new or recurrent neurologic symptoms not associated with fever or infection, lasting at least 24 hours, and accompanied by new objective neurological findings upon examination by the examining neurologist. New or recurrent neurologic symptoms that occur less than 30 days following the onset of a relapse were considered part of the same relapse. Participants who did not experience a relapse prior to switching to alternative MS medications, withdrew from study, or Amendment 3 (A3) took effect were censored at the time of switch/withdrawal/A3 effective date.

Time frame: Up to 4 years

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WPercentage of Participants Who RelapsedDid not relapse71 percentage of participants
BIIB017 Q4WPercentage of Participants Who RelapsedRelapsed29 percentage of participants
BIIB017 Q2WPercentage of Participants Who RelapsedDid not relapse77 percentage of participants
BIIB017 Q2WPercentage of Participants Who RelapsedRelapsed23 percentage of participants
Comparison: q2w/q4wp-value: 0.020195% CI: [0.59, 0.96]Cox proportion hazards model
Secondary

Summary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How convenient or inconvenient is it to take your medication as instructed? answers were numerically rated from 1 (extremely inconvenient) to 10 (extremely convenient). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 1; n=482, 4968.2 units on a scaleStandard Deviation 2.09
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 2; n=426, 4308.3 units on a scaleStandard Deviation 1.98
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 3; n=82, 888.3 units on a scaleStandard Deviation 2.05
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 1; n=482, 4968.0 units on a scaleStandard Deviation 2.12
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 2; n=426, 4308.2 units on a scaleStandard Deviation 2.05
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication as Instructed?Year 3; n=82, 888.0 units on a scaleStandard Deviation 2.08
Secondary

Summary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How convenient or inconvenient is it to take your medication every 2 weeks? answers were numerically rated from 1 (extremely inconvenient) to 10 (extremely convenient). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 2; n=426, 4308.6 units on a scaleStandard Deviation 1.93
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 1; n=482, 4968.4 units on a scaleStandard Deviation 2.02
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 3; n=82, 888.6 units on a scaleStandard Deviation 2
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 2; n=426, 4308.4 units on a scaleStandard Deviation 2.06
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 1; n=482, 4968.4 units on a scaleStandard Deviation 1.99
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Convenient or Inconvenient Is It to Take Your Medication Every 2 Weeks?Year 3; n=82, 888.5 units on a scaleStandard Deviation 1.79
Secondary

Summary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How likely would you be to continue to use this medication? answers were numerically rated from 1 (extremely unlikely) to 10 (extremely likely). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 2; n=426, 4308.1 units on a scaleStandard Deviation 2.67
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 1; n=482, 4968.5 units on a scaleStandard Deviation 2.11
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 3; n=82, 888.5 units on a scaleStandard Deviation 2.39
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 1; n=482, 4968.6 units on a scaleStandard Deviation 2
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 2; n=426, 4308.3 units on a scaleStandard Deviation 2.58
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Likely Would You Be to Continue to Use This Medication?Year 3; n=82, 888.8 units on a scaleStandard Deviation 2
Secondary

Summary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How satisfied or dissatisfied are you with the injection frequency (every 2 weeks)? answers were numerically rated from 1 (extremely dissatisfied) to 10 (extremely satisfied). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 1; n=482, 4968.4 units on a scaleStandard Deviation 1.92
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 2; n=426, 4308.5 units on a scaleStandard Deviation 1.89
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 3; n=82, 888.7 units on a scaleStandard Deviation 1.99
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 1; n=482, 4968.3 units on a scaleStandard Deviation 1.98
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 2; n=426, 4308.3 units on a scaleStandard Deviation 2.07
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Satisfied or Dissatisfied Are You With the Injection Frequency (Every 2 Weeks)?Year 3; n=82, 888.6 units on a scaleStandard Deviation 1.59
Secondary

Summary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question How tolerable or intolerable do you find the medication? answers were numerically rated from 1 (extremely intolerable) to 10 (extremely tolerable). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 1; n=482, 4966.8 units on a scaleStandard Deviation 2.36
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 2; n=425, 4307.2 units on a scaleStandard Deviation 2.28
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 3; n=82, 887.5 units on a scaleStandard Deviation 2.46
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 1; n=482, 4967.0 units on a scaleStandard Deviation 2.21
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 2; n=425, 4307.1 units on a scaleStandard Deviation 2.27
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: How Tolerable or Intolerable Do You Find the Medication?Year 3; n=82, 887.3 units on a scaleStandard Deviation 2.17
Secondary

Summary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement I am satisfied with the dosing frequency (2 times per month) of this medication answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 1; n=482, 4968.4 units on a scaleStandard Deviation 1.98
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 2; n=425, 4308.7 units on a scaleStandard Deviation 1.83
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 3; n=82, 888.8 units on a scaleStandard Deviation 1.87
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 1; n=482, 4968.5 units on a scaleStandard Deviation 1.94
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 2; n=425, 4308.5 units on a scaleStandard Deviation 2.06
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: I Am Satisfied With the Dosing Frequency of This Medication.Year 3; n=82, 888.7 units on a scaleStandard Deviation 1.81
Secondary

Summary of Participant-Reported Treatment Satisfaction: Main Reason for Missed Injections

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Main reason for missed injections? answer choices were given as medication side effects, injection pain, forget to take medication, tired of taking injections, don't think medication is working, or other. Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment who missed at least 1 injection at given timepoint.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: medication side effects; n=8, 60 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: injection pain; n=8, 60 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: forget to take medication; n=8, 62 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: tired of taking injections; n=8, 60 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: don't think medication is working; n=8, 60 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: other; n=8, 66 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: medication side effects; n=4, 31 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: injection pain; n=4, 30 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: forget to take medication; n=4, 31 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: tired of taking injections; n=4, 30 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: don't think medication is working; n=4, 30 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: other; n=4, 32 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: medication side effects; n=2, 20 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: injection pain; n=2, 20 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: forget to take medication; n=2, 20 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: tired of taking injections; n=2, 21 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: don't think medication is working; n=2, 20 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: other; n=2, 21 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: injection pain; n=2, 20 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: medication side effects; n=8, 61 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: tired of taking injections; n=4, 30 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: injection pain; n=8, 60 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: other; n=2, 21 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: forget to take medication; n=8, 61 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: don't think medication is working; n=4, 30 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: tired of taking injections; n=8, 60 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: forget to take medication; n=2, 20 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: don't think medication is working; n=8, 60 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: other; n=4, 31 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 1: other; n=8, 64 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: don't think medication is working; n=2, 20 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: medication side effects; n=4, 31 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: medication side effects; n=2, 20 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: injection pain; n=4, 30 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 3: tired of taking injections; n=2, 21 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Main Reason for Missed InjectionsYear 2: forget to take medication; n=4, 31 participants
Secondary

Summary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Overall, how satisfied or dissatisfied are you with this medication? answers were numerically rated from 1 (extremely dissatisfied) to 10 (extremely satisfied). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 3; n=82, 888.2 units on a scaleStandard Deviation 2
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 1; n=482, 4967.9 units on a scaleStandard Deviation 2.04
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 2; n=426, 4308.2 units on a scaleStandard Deviation 2.04
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 1; n=482, 4968.1 units on a scaleStandard Deviation 1.97
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 2; n=426, 4308.3 units on a scaleStandard Deviation 2
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Overall, How Satisfied or Dissatisfied Are You With This Medication?Year 3; n=82, 888.6 units on a scaleStandard Deviation 1.6
Secondary

Summary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the question Over the past 4 weeks, did you miss any of your injections? answer choices were given as none missed, miss 1 injection, or miss 2 injections. Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: 1 missed; n=482, 4938 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: 2 missed; n=426, 4291 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: none missed; n=426, 429422 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: none missed; n=81, 8879 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: 2 missed; n=482, 4930 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: 1 missed; n=81, 880 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: 1 missed; n=426, 4293 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: 2 missed; n=81, 882 participants
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: none missed; n=482, 493474 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: 2 missed; n=81, 881 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: none missed; n=482, 493487 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: 1 missed; n=482, 4934 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 1: 2 missed; n=482, 4932 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: none missed; n=426, 429426 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: 1 missed; n=426, 4292 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 2: 2 missed; n=426, 4291 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: none missed; n=81, 8886 participants
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: Over the Past 4 Weeks, Did You Miss Any of Your Injections?Year 3: 1 missed; n=81, 881 participants
Secondary

Summary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement The twice a month dosing enables me to be more spontaneous and flexible, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 1; n=482, 4968.1 units on a scaleStandard Deviation 2.2
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 2; n=426, 4308.3 units on a scaleStandard Deviation 2.12
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 3; n=82, 888.5 units on a scaleStandard Deviation 2.17
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 2; n=426, 4308.2 units on a scaleStandard Deviation 2.12
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 1; n=482, 4968.2 units on a scaleStandard Deviation 2.09
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Enables Me to Be More Spontaneous and Flexible.Year 3; n=82, 888.4 units on a scaleStandard Deviation 1.93
Secondary

Summary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement The twice a month dosing makes it more convenient for me to travel/vacation, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 1; n=482, 4968.2 units on a scaleStandard Deviation 2.21
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 2; n=426, 4308.3 units on a scaleStandard Deviation 2.2
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 3; n=82, 888.6 units on a scaleStandard Deviation 1.97
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 1; n=482, 4968.2 units on a scaleStandard Deviation 2.13
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 2; n=426, 4308.2 units on a scaleStandard Deviation 2.21
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: The Twice a Month Dosing Makes It More Convenient for Me to Travel/Vacation.Year 3; n=82, 888.5 units on a scaleStandard Deviation 1.86
Secondary

Summary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 1; n=482, 4967.3 units on a scaleStandard Deviation 2.52
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 2; n=426, 4307.8 units on a scaleStandard Deviation 2.35
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 3; n=82, 888.0 units on a scaleStandard Deviation 2.44
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 1; n=482, 4967.8 units on a scaleStandard Deviation 2.21
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 2; n=426, 4307.8 units on a scaleStandard Deviation 2.31
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Enables Me to Focus More on Myself and My Family Rather Than My MS.Year 3; n=82, 888.3 units on a scaleStandard Deviation 2
Secondary

Summary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This medication improves my self-confidence and self-reliance, answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 2; n=426, 4297.9 units on a scaleStandard Deviation 2.5
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 1; n=482, 4967.5 units on a scaleStandard Deviation 2.47
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 3; n=82, 888.1 units on a scaleStandard Deviation 2.45
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 1; n=482, 4967.7 units on a scaleStandard Deviation 2.29
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 2; n=426, 4297.9 units on a scaleStandard Deviation 2.31
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Improves My Self-Confidence and Self-Reliance.Year 3; n=82, 888.4 units on a scaleStandard Deviation 1.98
Secondary

Summary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.

Participants completed a Treatment Satisfaction Questionnaire composed of a range of 14 questions regarding the participant's perception of treatment satisfaction at the end of each year of treatment. For the statement This medication makes it easy for me to carry out my daily responsibilities (ie, going to work, doing household chores or caring for my family), answers were numerically rated from 1 (strongly disagree) to 10 (strongly agree). Data after Amendment 3 took effect are excluded.

Time frame: Year 1, Year 2, Year 3

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 1; n=482, 4967.4 units on a scaleStandard Deviation 2.44
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 2; n=426, 4297.8 units on a scaleStandard Deviation 2.32
BIIB017 Q4WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 3; n=82, 887.9 units on a scaleStandard Deviation 2.57
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 1; n=482, 4967.7 units on a scaleStandard Deviation 2.33
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 2; n=426, 4297.7 units on a scaleStandard Deviation 2.35
BIIB017 Q2WSummary of Participant-Reported Treatment Satisfaction: This Medication Makes It Easy For Me to Carry Out My Daily Responsibilities.Year 3; n=82, 888.3 units on a scaleStandard Deviation 2.07
Secondary

Time to Sustained Disability Progression

Estimated proportion of participants with progression and time to progression based on the Kaplan-Meier product limit method. Sustained disability progression is defined as: at least a 1.0 point increase on the EDSS from 105MS302 baseline EDSS ≥ 1.0 that is sustained for 24 weeks, or at least a 1.5 point increase on the EDSS from 105MS302 baseline EDSS = 0 that is sustained for 24 weeks. The EDSS measures the disability status of people with multiple sclerosis on a scale that ranges from 0 to 10. The range of main categories include (0) = normal neurologic exam; to (5) = ambulatory without aid or rest for 200 meters; disability severe enough to impair full daily activities; to (10) = death due to MS. Participants were censored at the time of withdrawal/switch/A3 effective date if they withdrew from study, switched to alternative MS medication, or Amendment 3 took effect without a progression.

Time frame: Weeks 12, 24, 28, 72, 96, 120, 144, 168

Population: Participants in the ITT population (all participants who were assigned a treatment and received at least 1 dose of study treatment) with disability progression.

ArmMeasureGroupValue (NUMBER)
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 12 weeks0.023 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 24 weeks0.046 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 48 weeks0.079 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 72 weeks0.103 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 96 weeks0.115 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 120 weeks0.147 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 144 weeks0.161 proportion of participants
BIIB017 Q4WTime to Sustained Disability ProgressionProgressed at 168 weeksNA proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 168 weeksNA proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 96 weeks0.069 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 12 weeks0.007 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 24 weeks0.023 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 144 weeks0.096 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 48 weeks0.045 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 120 weeks0.085 proportion of participants
BIIB017 Q2WTime to Sustained Disability ProgressionProgressed at 72 weeks0.057 proportion of participants
p-value: 0.00695% CI: [0.38, 0.85]Cox Proportional Hazards model
Secondary

Volume of Gd-Enhancing Lesions

The volume of Gd-enhancing lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WVolume of Gd-Enhancing LesionsBaseline; n=528, 5430.0911 cm^3Standard Deviation 0.30013
BIIB017 Q4WVolume of Gd-Enhancing LesionsWeek 48; n=481, 4930.1172 cm^3Standard Deviation 0.42762
BIIB017 Q4WVolume of Gd-Enhancing LesionsWeek 96; n=411, 4070.1346 cm^3Standard Deviation 0.5058
BIIB017 Q2WVolume of Gd-Enhancing LesionsBaseline; n=528, 5430.0348 cm^3Standard Deviation 0.17344
BIIB017 Q2WVolume of Gd-Enhancing LesionsWeek 48; n=481, 4930.0477 cm^3Standard Deviation 0.31479
BIIB017 Q2WVolume of Gd-Enhancing LesionsWeek 96; n=411, 4070.0357 cm^3Standard Deviation 0.14976
Secondary

Volume of T1 Hypointense Lesions

The volume of T1 hypointense lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WVolume of T1 Hypointense LesionsBaseline; n=528, 5433.9869 cm^3Standard Deviation 6.29557
BIIB017 Q4WVolume of T1 Hypointense LesionsWeek 48; n=481, 4934.3062 cm^3Standard Deviation 6.92839
BIIB017 Q4WVolume of T1 Hypointense LesionsWeek 96; n=411, 4074.3171 cm^3Standard Deviation 6.70107
BIIB017 Q2WVolume of T1 Hypointense LesionsBaseline; n=528, 5433.6320 cm^3Standard Deviation 5.47465
BIIB017 Q2WVolume of T1 Hypointense LesionsWeek 48; n=481, 4933.6529 cm^3Standard Deviation 5.19027
BIIB017 Q2WVolume of T1 Hypointense LesionsWeek 96; n=411, 4073.7494 cm^3Standard Deviation 5.21314
Secondary

Volume of T2 Hyperintense Lesions

The volume of T2 hyperintense lesions as assessed by MRI. Observed data after participants switched to alternative MS medications or after Amendment 3 took effect are excluded.

Time frame: Baseline (start of 105MS302), Week 48, Week 96

Population: ITT population: all participants who were assigned a treatment and received at least 1 dose of study treatment; n=number of participants with an assessment at given timepoint.

ArmMeasureGroupValue (MEAN)Dispersion
BIIB017 Q4WVolume of T2 Hyperintense LesionsBaseline; n=528, 54311.4742 cm^3Standard Deviation 13.55811
BIIB017 Q4WVolume of T2 Hyperintense LesionsWeek 48; n=481, 49311.7421 cm^3Standard Deviation 13.91774
BIIB017 Q4WVolume of T2 Hyperintense LesionsWeek 96; n=411, 40712.0257 cm^3Standard Deviation 13.91056
BIIB017 Q2WVolume of T2 Hyperintense LesionsBaseline; n=528, 5439.9678 cm^3Standard Deviation 11.41807
BIIB017 Q2WVolume of T2 Hyperintense LesionsWeek 48; n=481, 4939.8335 cm^3Standard Deviation 11.05029
BIIB017 Q2WVolume of T2 Hyperintense LesionsWeek 96; n=411, 4079.9487 cm^3Standard Deviation 10.97208

Source: ClinicalTrials.gov · Data processed: Mar 18, 2026