This is a multicenter, open-label, single-arm study designed to evaluate the safety, efficacy, pharmacokinetics, and pharmacodynamics of emicizumab in participants with mild or moderate hemophilia A without inhibitors against factor VIII (FVIII).
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
73
Four loading doses of emicizumab 3 milligrams per kilogram of body weight (mg/kg) will be administered subcutaneously (SC) once a week (QW) for 4 weeks followed by participant's preference of one of the three following maintenance SC dose regimens: 1.5 mg/kg QW, 3 mg/kg once every 2 weeks (Q2W), or 6 mg/kg once every 4 weeks (Q4W).
Childrens Hospital LA
Los Angeles, California, United States
Hemophilia of Georgia Center for Bleeding & Clotting Disorders
Atlanta, Georgia, United States
Indiana Hemophilia & Thrombosis center
Indianapolis, Indiana, United States
University of Michigan, C.S. Mott Children's Hospital
Ann Arbor, Michigan, United States
Washington Institute for Coagulation
Seattle, Washington, United States
Cliniques Universitaires St-Luc
Brussels, Belgium
UZ Leuven Gasthuisberg
Leuven, Belgium
Kaye Edmonton Clinic
Edmonton, Alberta, Canada
Eastern Health - General Hospital
St. John's, Newfoundland and Labrador, Canada
Hopital Cardio-vasculaire Louis Pradel
Bron, France
...and 12 more locations
Model-Based Annualized Bleed Rate for Treated Bleeds
The number of treated bleeds over the efficacy period was estimated as an annualized bleed rate (ABR) using a negative binomial regression model, which accounts for different follow-up times. A treated bleed was defined as a bleed that was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Mean Calculated Annualized Bleed Rate for Treated Bleeds
The number of treated bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated bleed was defined as a bleed that was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Median Calculated Annualized Bleed Rate for Treated Bleeds
The number of treated bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated bleed was defined as a bleed that was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Model-Based Annualized Bleed Rate for All Bleeds
The number of all bleeds over the efficacy period was estimated as an annualized bleed rate (ABR) using a negative binomial regression model, which accounts for different follow-up times. In this outcome measure, all bleeds are included, irrespective of treatment with coagulation factors, with the following exception: bleeds due to surgery/procedure are excluded. As "all bleeds" comprises both treated and non-treated bleeds, the 72-hour rule was implemented separately for treated and non-treated bleeds. For treated bleeds, the 72-hour rule meant that two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. For non-treated bleeds, the 72-hour rule was implemented by calculating a treatment-free period of 72 hours from the bleed itself.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Mean Calculated Annualized Bleed Rate for All Bleeds
The number of all bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. In this outcome measure, all bleeds are included, irrespective of treatment with coagulation factors, with the following exception: bleeds due to surgery/procedure are excluded. As "all bleeds" comprises both treated and non-treated bleeds, the 72-hour rule was implemented separately for treated and non-treated bleeds. For treated bleeds, the 72-hour rule meant that two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. For non-treated bleeds, the 72-hour rule was implemented by calculating a treatment-free period of 72 hours from the bleed itself.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Median Calculated Annualized Bleed Rate for All Bleeds
The number of all bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. In this outcome measure, all bleeds are included, irrespective of treatment with coagulation factors, with the following exception: bleeds due to surgery/procedure are excluded. As "all bleeds" comprises both treated and non-treated bleeds, the 72-hour rule was implemented separately for treated and non-treated bleeds. For treated bleeds, the 72-hour rule meant that two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. For non-treated bleeds, the 72-hour rule was implemented by calculating a treatment-free period of 72 hours from the bleed itself.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Model-Based Annualized Bleed Rate for Treated Joint Bleeds
The number of treated joint bleeds over the efficacy period was estimated as an annualized bleed rate (ABR) using a negative binomial regression model, which accounts for different follow-up times. A treated joint bleed was defined as a bleed with type reported as "joint" based on at least one of the following symptoms: increasing swelling or warmth of the skin over the joint and/or increasing pain, decreased range of motion, or difficulty using the joint compared with baseline, and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Mean Calculated Annualized Bleed Rate for Treated Joint Bleeds
The number of treated joint bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated joint bleed was defined as a bleed with type reported as "joint" based on at least one of the following symptoms: increasing swelling or warmth of the skin over the joint and/or increasing pain, decreased range of motion, or difficulty using the joint compared with baseline, and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Median Calculated Annualized Bleed Rate for Treated Joint Bleeds
The number of treated joint bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated joint bleed was defined as a bleed with type reported as "joint" based on at least one of the following symptoms: increasing swelling or warmth of the skin over the joint and/or increasing pain, decreased range of motion, or difficulty using the joint compared with baseline, and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Model-Based Annualized Bleed Rate for Treated Target Joint Bleeds
The number of treated target joint bleeds over the efficacy period was estimated as an annualized bleed rate (ABR) using a negative binomial regression model, which accounts for different follow-up times. A treated target joint bleed was defined as a joint bleed in a target joint, which is a joint location where at least 3 bleeds have occurred over the last 24 weeks prior to study entry or an unresolved target joint (target joint that does not fulfil ≤2 bleeds into this joint within a consecutive 12-month period), and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Mean Calculated Annualized Bleed Rate for Treated Target Joint Bleeds
The number of treated target joint bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated target joint bleed was defined as a joint bleed in a target joint, which is a joint location where at least 3 bleeds have occurred over the last 24 weeks prior to study entry or an unresolved target joint (target joint that does not fulfil ≤2 bleeds into this joint within a consecutive 12-month period), and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Median Calculated Annualized Bleed Rate for Treated Target Joint Bleeds
The number of treated target joint bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated target joint bleed was defined as a joint bleed in a target joint, which is a joint location where at least 3 bleeds have occurred over the last 24 weeks prior to study entry or an unresolved target joint (target joint that does not fulfil ≤2 bleeds into this joint within a consecutive 12-month period), and the bleed was directly followed by a hemophilia medication reported to be a "treatment for bleed". The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Model-Based Annualized Bleed Rate for Treated Spontaneous Bleeds
The number of treated spontaneous bleeds over the efficacy period was estimated as an annualized bleed rate (ABR) using a negative binomial regression model, which accounts for different follow-up times. A treated spontaneous bleed was defined as a treated bleed (bleed directly followed by a hemophilia medication reported to be a "treatment for bleed") with no other known contributing factor such as trauma or procedure/surgery. The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Mean Calculated Annualized Bleed Rate for Treated Spontaneous Bleeds
The number of treated spontaneous bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated spontaneous bleed was defined as a treated bleed (bleed directly followed by a hemophilia medication reported to be a "treatment for bleed") with no other known contributing factor such as trauma or procedure/surgery. The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
Median Calculated Annualized Bleed Rate for Treated Spontaneous Bleeds
The number of treated spontaneous bleeds over the efficacy period is presented here as a calculated annualized bleed rate (ABR) that was annualized for each participant using the following formula: ABR = (number of bleeds/number of days during the efficacy period) x 365.25. A treated spontaneous bleed was defined as a treated bleed (bleed directly followed by a hemophilia medication reported to be a "treatment for bleed") with no other known contributing factor such as trauma or procedure/surgery. The 72-hour rule was implemented: two bleeds of the same type and at the same anatomical location were counted as one bleed if the second bleed occurred within 72 hours from the last treatment for the first bleed. Bleeds due to surgery/procedure were excluded.
Time frame: From the day of first emicizumab dose to at least 52 weeks of emicizumab treatment (median [range, min-max] efficacy period: 55.64 [8.6-89.9] weeks)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Daily Activity Risk Perception and Impact Domain Scores Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Social Activity Risk Perception and Impact Domain Scores Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Recreational Activity Risk Perception and Impact Domain Scores Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Work Impact Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Preoccupation Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Change From Baseline in the Treatment Burden Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Number of Participants by Responses to Their Level of Pain Associated With a Bleed Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Number of Participants by Responses to Their Level of Pain in Target Joints Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Number of Participants by Responses to Their Level of Pain at Its Worst Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Number of Participants by Responses to Their Level of Pain at Its Least Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Adult Participants: Number of Participants by Responses to Their Level of Pain on Average Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the Daily Activity Risk Perception and Impact Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the Social Activity Risk Perception and Impact Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the Recreational Activity Risk Perception and Impact Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the School Impact Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the Preoccupation Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Change From Baseline in the Treatment Burden Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Number of Participants by Responses to Their Level of Pain Associated With a Bleed Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Pediatric Participants: Number of Participants by Responses to Their Level of Pain at Its Worst Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Caregivers: Change From Baseline in the Preoccupation Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
CATCH Questionnaire for Caregivers: Change From Baseline in the Treatment Burden Domain Score Over Time
CATCH = Comprehensive Assessment Tool of Challenges in Hemophilia
Time frame: Baseline (Week 1), Weeks 13, 25, 37 and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Percentage of Participants Who Prefer Emicizumab SC Treatment, Their Previous Hemophilia IV Treatment, or Have No Preference, as Assessed Through Use of the Emicizumab Preference Survey at Week 17
The Emicizumab Preference Survey is a fit-for-purpose questionnaire developed by the sponsor to record the participant's preference for treatment with subcutaneous (SC) emicizumab, intravenous (IV) factor VIIII (FVIII), or no preference. The 95% confidence intervals were calculated using the Pearson-Clopper method.
Time frame: Week 17
Percentage of Caregivers Who Prefer Emicizumab SC Treatment, Their Child's Previous Hemophilia IV Treatment, or Have No Preference, as Assessed Through Use of the Emicizumab Preference Survey at Week 17
The Emicizumab Preference Survey is a fit-for-purpose questionnaire developed by the sponsor to record the caregiver's preference for their child's treatment with subcutaneous (SC) emicizumab, intravenous (IV) factor VIIII (FVIII), or no preference. The 95% confidence intervals were calculated using the Pearson-Clopper method.
Time frame: Week 17
Hemophilia Joint Health Scores Over Time
Time frame: Days -7 to -1, Weeks 25, 49, and every 24 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Mean Daily Peak Activity Duration Over Time
For physical activity assessment, participants ≥5 years of age were instructed to wear the study accelerometry device on the wrist continuously (24 hours/day) every day for the designated 2-week periods during the study. A participant was considered to be compliant with the physical activity assessments if they wore the study device continuously (≥8 hours/day) every day for at least 8 days of each of the designated 2-week periods during the study. If this compliance criterion was not reached at a specific timepoint the participant was not included in the analysis of the designated 2-week periods where compliance was not reached. Daily measurements were averaged over the 14-days timepoint. Activity count was a measure of the acceleration measured by the device. The daily peak activity duration was defined as the sum of moderate to vigorous activity per day (in minutes).
Time frame: Baseline (Weeks 1-2) and Weeks 13 (Weeks 12-13 period), 25 (Weeks 24-25 period), 37 (Weeks 36-37 period), and 49 (Weeks 48-49 period)
Change From Baseline in Mean Daily Step Count Over Time
For physical activity assessment, participants ≥5 years of age were instructed to wear the study accelerometry device on the wrist continuously (24 hours/day) every day for the designated 2-week periods during the study. A participant was considered to be compliant with the physical activity assessments if they wore the study device continuously (≥8 hours/day) every day for at least 8 days of each of the designated 2-week periods during the study. If this compliance criterion was not reached at a specific timepoint the participant was not included in the analysis of the designated 2-week periods where compliance was not reached. Daily measurements were averaged over the 14-days timepoint. Activity count was a measure of the acceleration measured by the device.
Time frame: Baseline (Weeks 1-2) and Weeks 13 (Weeks 12-13), 25 (Weeks 24-25), 37 (Weeks 36-37), and 49 (Weeks 48-49)
Menstrual Bleed Questionnaire (MBQ) for Female Participants of Childbearing Potential: Change From Baseline in the MBQ Total Score Over Time
Time frame: Baseline (Week 1), Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, and every 4 weeks thereafter until Study Completion (up to approximately 48 months)
Menstrual Bleed Questionnaire (MBQ) for Female Participants of Childbearing Potential: Change From Baseline in the Heaviness Subscale Score Over Time
Time frame: Baseline (Week 1), Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, and every 4 weeks thereafter until Study Completion (up to approximately 48 months)
Menstrual Bleed Questionnaire (MBQ) for Female Participants of Childbearing Potential: Change From Baseline in the Quality of Life Subscale Score Over Time
Time frame: Baseline (Week 1), Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, and every 4 weeks thereafter until Study Completion (up to approximately 48 months)
Menstrual Bleed Questionnaire (MBQ) for Female Participants of Childbearing Potential: Change From Baseline in the Irregularity Subscale Score Over Time
Time frame: Baseline (Week 1), Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, and every 4 weeks thereafter until Study Completion (up to approximately 48 months)
Menstrual Bleed Questionnaire (MBQ) for Female Participants of Childbearing Potential: Change From Baseline in the Pain Subscale Score Over Time
Time frame: Baseline (Week 1), Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, and every 4 weeks thereafter until Study Completion (up to approximately 48 months)
Menstruation Diary With the Pictorial Blood Assessment Chart (PBAC) for Female Participants of Childbearing Potential: PBAC Scores Over Time
Time frame: Baseline (Day 1) and monthly (on days of menstruation) until Study Completion (up to approximately 48 months)
Number of Participants With at Least One Adverse Event by Severity, According to the World Health Organization (WHO) Toxicity Grading Scale
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With Adverse Events Leading to Study Drug Discontinuation
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With at Least One Thromboembolic Event
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With at Least One Event of Thrombotic Microangiopathy
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With at Least One Injection-Site Reaction by Severity, According to the WHO Toxicity Grading Scale
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With at Least One Severe Hypersensitivity, Anaphylaxis, and Anaphylactoid Event
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Number of Participants With at Least One Laboratory Abnormality
Laboratory parameters for hematology and blood chemistry will be measured and compared with a standard reference range. Values outside the standard reference range are considered abnormalities. Not every laboratory abnormality qualifies as an adverse event. A laboratory test result will be reported as an adverse event if it meets any of the following criteria: is accompanied by clinical symptoms; results in a change in study treatment or a medical intervention; or is clinically significant in the investigator's judgment.
Time frame: From Screening (Day -28 to -1) to Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Respiratory Rate Over Time
Time frame: Baseline, Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Pulse Rate Over Time
Time frame: Baseline, Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Body Temperature Over Time
Time frame: Baseline, Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Systolic Blood Pressure Over Time
Time frame: Baseline, Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Diastolic Blood Pressure Over Time
Time frame: Baseline, Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Electrocardiogram (ECG) Parameters Over Time: QT, QTcB, QTcF, RR, PR, and QRS Intervals
Time frame: Baseline, Weeks 5, 25, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Change From Baseline in Heart Rate Over Time, as Measured by Electrocardiogram (ECG)
Time frame: Baseline, Weeks 5, 25, and 49, and every 12 weeks thereafter until Study Completion/Discontinuation Visit (up to approximately 48 months)
Plasma Trough Concentration (Ctrough) of Emicizumab Over Time
Time frame: Pre-dose at Weeks 1, 2, 3, 4, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, and 49, and every 12 weeks thereafter until study completion/discontinuation (up to approximately 48 months)
Number of Participants With Anti-Drug Antibodies Against Emicizumab at Baseline and Post-Baseline
Time frame: Pre-dose at Baseline (Week 1) and Weeks 5, 13, 25, 33, 41, and 49, and every 12 weeks thereafter until study completion/discontinuation (up to approximately 48 months)
Number of Participants Who Develop Anti-FVIII Inhibitors Over Time
Time frame: Screening (Day -28 to -1) and Weeks 1, 13, 25, 37, and 49, and every 12 weeks thereafter until study completion/discontinuation (up to approximately 48 months)