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SPIRIT EXTENSION: Efficacy and Safety Extension Study of Relugolix in Women With Endometriosis-Associated Pain

SPIRIT EXTENSION: An International Phase 3 Open-Label, Single-Arm, Safety and Efficacy Extension Study to Evaluate Relugolix Co-Administered With Low-Dose Estradiol and Norethindrone Acetate in Women With Endometriosis-Associated Pain

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03654274
Enrollment
802
Registered
2018-08-31
Start date
2018-05-22
Completion date
2023-01-31
Last updated
2023-08-08

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

Conditions

Endometriosis

Keywords

Endometriosis, Dysmenorrhea, Pain, Dyspareunia, Pelvic Pain

Brief summary

The purpose of this study is to evaluate the long-term efficacy and safety of relugolix 40 milligram (mg) once daily co-administered with low-dose estradiol (E2) and norethindrone acetate (NETA) for up to 104 weeks on endometriosis-associated pain in participants who previously completed a 24-week treatment period in one of the parent studies (MVT-601-3101 or MVT-601-3102).

Detailed description

This study is an international phase 3 open-label, single-arm, long-term efficacy and safety extension study that will enroll eligible participants who have completed their participation in one of the phase 3 randomized, double-blind, placebo-controlled parent studies, MVT-601-3101 (SPIRIT 1 - NCT03204318) or MVT-601-3102 (SPIRIT 2 - NCT03204331). All participants will receive relugolix 40 mg orally once daily co-administered with low-dose E2 (1.0 mg) and NETA (0.5 mg) for 80 weeks. Approximately 800 women with endometriosis-associated pain will be enrolled, after having completed a 24-week treatment period in one of the parent studies. The objectives of the study are to evaluate long-term efficacy and safety through up to 104 weeks of treatment (including treatment during the parent study) of relugolix co-administered with low-dose E2/NETA. Baseline procedures for this extension study will be performed on the same day as the Week 24 Visit of the parent study. This visit, referred to as the Week 24/Baseline Visit, will be defined as the date of completion of the last Week 24 procedure in the parent study. Participants will have received their last dose of study drug in the parent study on the day prior to the Week 24/Baseline Visit and will receive their first dose of study drug for this extension study in the clinic after the participant is determined to be eligible for this extension study and has provided informed consent to participate. The administration of the first dose of study drug for MVT-601-3103 will define enrollment into this study. Study participants will then take the open-label study treatment orally, once daily for 80 weeks.

Interventions

DRUGRelugolix

Relugolix 40-mg tablet administered orally once daily

Capsule containing co-formulated tablet of E2 (1.0 mg) and NETA (0.5 mg) administered orally once daily

Sponsors

Myovant Sciences GmbH
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Open label extension

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 51 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: 1. Completed 24 weeks of study drug treatment and study participation in either parent study, MVT-601-3101 or MVT-601-3102. 2. Is not expected to undergo gynecological surgery or other surgical procedures for treatment of endometriosis (including ablation, shaving, or excision) during the study, including during the Follow-Up Period, and the participant does not desire such treatment during this time frame. 3. Has agreed to continue to use only study-specified analgesic medications during the study and is not known to be intolerant to these. Key

Exclusion criteria

1. Has had a surgical procedure for treatment for endometriosis at any time during the parent study (MVT-601-3101 or MVT-601-3102). 2. Has any chronic pain or frequently recurring pain condition, other than endometriosis, that is treated with opioids or requires analgesics for ≥ 7 days per month. 3. Has a Z-score \< -2.0 or has a ≥ 7% decrease in bone mineral density from the parent study Baseline at lumbar spine, total hip, or femoral neck based on the parent study Week 24 DXA assessment of bone mineral density. 4. Has any contraindication to treatment with low-dose E2 and NETA, including: 1. Known, suspected, or history of breast cancer; 2. Known or suspected estrogen-dependent neoplasia; 3. Active deep vein thrombosis or pulmonary embolism, or history of these conditions prior to the Week 24/Baseline visit; 4. History of or active arterial thromboembolic disease, including stroke and myocardial infarction; 5. Known anaphylactic reaction or angioedema or hypersensitivity to E2 or NETA; 6. Known protein C, protein S, or antithrombin deficiency, or other known thrombophilia disorders, including Factor V Leiden; 7. Migraine with aura; 8. History of porphyria. 5. Had any of the following clinical laboratory abnormalities at the parent study Week 20 visit or, if available, any subsequent visit in one of the parent studies (MVT-601-3101 or MVT-601-3102): 1. Alanine aminotransferase or aspartate aminotransferase \> 2.0 times the upper limit of normal (ULN); or 2. Bilirubin (total bilirubin) \> 1.5 x ULN (or \> 2.0 x ULN if secondary to Gilbert syndrome or pattern consistent with Gilbert syndrome).

Design outcomes

Primary

MeasureTime frameDescription
Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 52Week 52Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for dysmenorrhea declined from baseline to Week 52 by at least 2.8 points without increased use of protocol-specified analgesics for pelvic pain at Week 52 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.
Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 52Week 52Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for NMPP declined from baseline to Week 52 by at least 2.1 points without increased use of protocol-specified analgesics for pelvic pain at Week 52 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.
Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 104Week 104Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for dysmenorrhea declined from baseline to Week 104 by at least 2.8 points without increased use of protocol-specified analgesics for pelvic pain at Week 104 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.
Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 104Week 104Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for NMPP declined from baseline to Week 104 by at least 2.1 points without increased use of protocol-specified analgesics for pelvic pain at Week 104 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.

Secondary

MeasureTime frameDescription
Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 52Week 52Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 104Week 104Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants Who Are Better Or Much Better On The Patient Global Impression Of Change (PGIC) For Dysmenorrhea At Week 52Week 52The PGIC for dysmenorrhea is a 1-item questionnaire designed to assess participant's impression of change in the severity of pain during their menstrual cycle. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.
Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 52Week 52Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 104Week 104Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 52Week 52Assessed using an NRS score (11-point scale) for overall pain recorded daily in an electronic diary. Participants rated their overall pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 104Week 104Assessed using an NRS score (11-point scale) for overall pain recorded daily in an electronic diary. Participants rated their overall pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants Not Using Opioids For Endometriosis-associated Pain At Week 104Week 104Assessed based on usage of study-specified opioids for endometriosis-associated pain recorded daily in an electronic diary. Participants received protocol-specified opioids for treatment of endometriosis-associated pain as needed for pain but not prophylactically.
Percentage Of Participants Not Using Analgesics For Endometriosis-associated Pain At Week 104Week 104Assessed based on usage of study-specified analgesics for endometriosis-associated pain recorded daily in an electronic diary. Participants received protocol-specified analgesics for treatment of endometriosis-associated pain as needed for pain but not prophylactically.
Percentage Of Participants Who Are Better Or Much Better On The PGIC For NMPP At Week 52Week 52The PGIC for NMPP is a 1-item questionnaire designed to assess participant's impression of change in the severity of pain when they are not menstruating. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.
Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 52Week 52Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants were to report whether they had vaginal sexual intercourse and rated their level of pelvic pain during intercourse on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 104Week 104Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants were to report whether they had vaginal sexual intercourse and rated their level of pelvic pain during intercourse on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants Who Are Better Or Much Better On The PGIC For Dyspareunia At Week 52Week 52The PGIC for dyspareunia is a 1-item questionnaire designed to assess participant's impression of change in the severity of their pain during sexual intercourse. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.
Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 52Week 52Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dyspareunia recorded daily in an electronic diary. Participants were to report their pain during intercourse daily using the following response options: Severe (avoids intercourse because of pain), Moderate (intercourse painful to the point of causing interruption), Mild (tolerated pain), No pain (no pain during intercourse), or No intercourse (no intercourse for other reasons). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 104Week 104Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dyspareunia recorded daily in an electronic diary. Participants were to report their pain during intercourse daily using the following response options: Severe (avoids intercourse because of pain), Moderate (intercourse painful to the point of causing interruption), Mild (tolerated pain), No pain (no pain during intercourse), or No intercourse (no intercourse for other reasons). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 52Week 52The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4). The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 104Week 104The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4). The LS mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Week 52The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4).
Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Week 104The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4).
Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 52Week 52The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4). The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 104Week 104The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4). The LS mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Week 52The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4).
Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Week 104The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4).
Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Week 52Assessed using the following non-pain domains of the EHP-30 questionnaire: Control and Powerlessness (questions 12 through 17), Emotional Well-Being (questions 18 through 23), Social Support (questions 24 through 27), and Self-Image (questions 28 through 30). The score for each domain ranged from 0 to 100. Higher scores represent a greater impact of endometriosis. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Week 104Assessed using the following non-pain domains of the EHP-30 questionnaire: Control and Powerlessness (questions 12 through 17), Emotional Well-Being (questions 18 through 23), Social Support (questions 24 through 27), and Self-Image (questions 28 through 30). The score for each domain ranged from 0 to 100. Higher scores represent a greater impact of endometriosis. The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 52Week 52Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dysmenorrhea recorded daily in an electronic diary. Participants were to report their pain as related to functional impairment daily in an electronic diary using the following response options: Severe (in bed all day, incapacitation), Moderate (in bed part of the day, some loss of work efficiency), Mild (some loss of work efficiency), No pain (no pain associated with menstruation during past 24 hours), or did not menstruate during the past 24 hours. Participants gave a possible score of 0 (no pain) to 4 (did not menstruate). The LS mean was presented by pivotal study treatment group and by visit.
Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 104Week 104Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dysmenorrhea recorded daily in an electronic diary. Participants were to report their pain as related to functional impairment daily in an electronic diary using the following response options: Severe (in bed all day, incapacitation), Moderate (in bed part of the day, some loss of work efficiency), Mild (some loss of work efficiency), No pain (no pain associated with menstruation during past 24 hours), or did not menstruate during the past 24 hours. Participants gave a possible score of 0 (no pain) to 4 (did not menstruate). The LS mean was presented by pivotal study treatment group and by visit.
Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 52Week 52Assessed using the participant-modified Biberoglu and Behrman 4-point scale for pelvic pain recorded daily in an electronic diary. Participants reported their pain daily in an electronic diary using the following response options: Severe (requires strong analgesics), Moderate (noticeable pelvic pain), Mild (occasional pelvic pain), or No pain (no pain during past 24 hours). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.
Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 104Week 104Assessed using the participant-modified Biberoglu and Behrman 4-point scale for pelvic pain recorded daily in an electronic diary. Participants reported their pain daily in an electronic diary using the following response options: Severe (requires strong analgesics), Moderate (noticeable pelvic pain), Mild (occasional pelvic pain), or No pain (no pain during past 24 hours). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.
Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Week 52Assessed by dual-energy X-ray absorptiometry (DXA) scan at lumbar spine, total hip, and femoral neck (same leg for each participant) at each designated time point. All participants who completed treatment or terminated from the study early were required to return for a 6-month post-treatment follow-up (PTFU) and a 12-month PTFU DXA scan (except if participant was beyond 14 months from last day on treatment). Participants were also to have clinical laboratory evaluations (vitamin D, thyroid stimulating hormone, parathyroid hormone, creatinine, calcium, and phosphorous) at the 6-month and 12-month PTFU only if the PTFU DXA scans showed a bone loss of ≥3% at the lumbar spine and/or total hip compared with the parent study baseline.
Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Week 104Assessed by dual-energy X-ray absorptiometry (DXA) scan at lumbar spine, total hip, and femoral neck (same leg for each participant) at each designated time point. All participants who completed treatment or terminated from the study early were required to return for a 6-month post-treatment follow-up (PTFU) and a 12-month PTFU DXA scan (except if participant was beyond 14 months from last day on treatment). Participants were also to have clinical laboratory evaluations (vitamin D, thyroid stimulating hormone, parathyroid hormone, creatinine, calcium, and phosphorous) at the 6-month and 12-month PTFU only if the PTFU DXA scans showed a bone loss of ≥3% at the lumbar spine and/or total hip compared with the parent study baseline.
Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 52Week 52Assessed using the pain domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain. The least squares (LS) mean was presented by pivotal study treatment group and by visit.
Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 104Week 104Blood samples were collected from participants for estradiol measurements at each specified timepoints. Estradiol concentrations were measured using an immuno-enzymatic assay based on a commercially available kit.
Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 52Week 52Blood samples were collected from participants for estradiol measurements at each specified timepoints. Estradiol concentrations were measured using an immuno-enzymatic assay based on a commercially available kit.
Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 104Week 104Assessed using the pain domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain. The least squares (LS) mean was presented by pivotal study treatment group and by visit.
Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 52Week 52Assessed using the Pain Domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain.
Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 104Week 104Assessed using the Pain Domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain.

Countries

Argentina, Australia, Belgium, Brazil, Bulgaria, Canada, Chile, Czechia, Finland, Georgia, Hungary, Italy, New Zealand, Poland, Portugal, Romania, South Africa, Spain, Ukraine, United States

Participant flow

Recruitment details

All participants who completed their participation in one of the pivotal studies (MVT-601-3101 or MVT-601-3102) were eligible to enroll in this study.

Pre-assignment details

The study results were presented by pivotal study treatment but all the participants only received relugolix plus Estradiol (E2)/Norethindrone Acetate (NETA).

Participants by arm

ArmCount
Relugolix Plus E2/NETA (Group A)
Relugolix 40 mg once daily co-administered with E2 (1 mg) and NETA (0.5 mg) for 24 weeks in the pivotal study followed by Relugolix 40 mg once daily co-administered with E2/NETA for 80 weeks in this extension study.
277
Relugolix Plus Delayed E2/NETA (Group B)
Relugolix 40 mg monotherapy (once daily) for 12 weeks, followed by oral relugolix 40 mg once daily co-administered with E2 (1mg) and NETA (0.5 mg) for 12 weeks in the pivotal study and Relugolix 40 mg once daily co-administered with E2/NETA for 80 weeks in this extension study.
247
Placebo (Group C)
Relugolix placebo co-administered with E2/NETA placebo for up to 24 weeks in the pivotal study followed by Relugolix 40 mg once daily co-administered with E2/NETA for 80 weeks in this extension study.
275
Total799

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event192324
Overall StudyLack of Efficacy457
Overall StudyLost to Follow-up865
Overall StudyOther272932
Overall StudyParticipants Who Consented to Week 52 and Completed at Week 52001
Overall StudyPregnancy221
Overall StudyProtocol Deviation020
Overall StudyWithdrawal by Subject462533

Baseline characteristics

CharacteristicTotalRelugolix Plus E2/NETA (Group A)Relugolix Plus Delayed E2/NETA (Group B)Placebo (Group C)
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
799 Participants277 Participants247 Participants275 Participants
BMD Femoral Neck0.92 g/cm^2
STANDARD_DEVIATION 0.149
0.93 g/cm^2
STANDARD_DEVIATION 0.157
0.92 g/cm^2
STANDARD_DEVIATION 0.136
0.93 g/cm^2
STANDARD_DEVIATION 0.151
BMD Total Hip0.97 g/cm^2
STANDARD_DEVIATION 0.126
0.98 g/cm^2
STANDARD_DEVIATION 0.133
0.97 g/cm^2
STANDARD_DEVIATION 0.12
0.98 g/cm^2
STANDARD_DEVIATION 0.123
Bone Mineral Density (BMD) Lumbar Spine L1-L41.14 g/cm^2
STANDARD_DEVIATION 0.153
1.14 g/cm^2
STANDARD_DEVIATION 0.163
1.14 g/cm^2
STANDARD_DEVIATION 0.144
1.14 g/cm^2
STANDARD_DEVIATION 0.149
Dysmenorrhea Numerical Rating Scale (NRS) Score at Baseline7.1 score on a scale
STANDARD_DEVIATION 1.65
7.1 score on a scale
STANDARD_DEVIATION 1.66
7.0 score on a scale
STANDARD_DEVIATION 1.65
7.2 score on a scale
STANDARD_DEVIATION 1.63
Ethnicity (NIH/OMB)
Hispanic or Latino
100 Participants27 Participants31 Participants42 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
697 Participants249 Participants215 Participants233 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
2 Participants1 Participants1 Participants0 Participants
Nonmenstrual Pelvic Pain (NMPP) NRS Score at Baseline5.6 score on a scale
STANDARD_DEVIATION 1.94
5.7 score on a scale
STANDARD_DEVIATION 1.93
5.5 score on a scale
STANDARD_DEVIATION 1.98
5.7 score on a scale
STANDARD_DEVIATION 1.91
Race/Ethnicity, Customized
American Indian or Alaska Native
2 Participants1 Participants1 Participants0 Participants
Race/Ethnicity, Customized
Asian
1 Participants0 Participants1 Participants0 Participants
Race/Ethnicity, Customized
Black or African American
37 Participants17 Participants7 Participants13 Participants
Race/Ethnicity, Customized
Multiple
11 Participants4 Participants2 Participants5 Participants
Race/Ethnicity, Customized
Native Hawaiian or Other Pacific Islander
1 Participants0 Participants0 Participants1 Participants
Race/Ethnicity, Customized
Not Reported
0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Other
9 Participants1 Participants0 Participants8 Participants
Race/Ethnicity, Customized
White
738 Participants254 Participants236 Participants248 Participants
Region of Enrollment
Argentina
34 participants10 participants12 participants12 participants
Region of Enrollment
Australia
11 participants2 participants4 participants5 participants
Region of Enrollment
Belgium
8 participants3 participants2 participants3 participants
Region of Enrollment
Brazil
41 participants13 participants13 participants15 participants
Region of Enrollment
Bulgaria
29 participants14 participants5 participants10 participants
Region of Enrollment
Canada
6 participants0 participants2 participants4 participants
Region of Enrollment
Chile
5 participants3 participants1 participants1 participants
Region of Enrollment
Czechia
28 participants12 participants8 participants8 participants
Region of Enrollment
Finland
5 participants2 participants2 participants1 participants
Region of Enrollment
Georgia
7 participants5 participants1 participants1 participants
Region of Enrollment
Hungary
24 participants7 participants10 participants7 participants
Region of Enrollment
Italy
17 participants7 participants8 participants2 participants
Region of Enrollment
New Zealand
8 participants2 participants2 participants4 participants
Region of Enrollment
Poland
297 participants105 participants86 participants106 participants
Region of Enrollment
Portugal
7 participants1 participants4 participants2 participants
Region of Enrollment
Romania
31 participants12 participants12 participants7 participants
Region of Enrollment
South Africa
32 participants8 participants10 participants14 participants
Region of Enrollment
Spain
2 participants0 participants1 participants1 participants
Region of Enrollment
Ukraine
63 participants23 participants20 participants20 participants
Region of Enrollment
United States
144 participants48 participants44 participants52 participants
Sex: Female, Male
Female
799 Participants277 Participants247 Participants275 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants
Time Since Surgical Diagnosis of Endometriosis4.2 years
STANDARD_DEVIATION 3.6
4.0 years
STANDARD_DEVIATION 3.52
4.7 years
STANDARD_DEVIATION 4
3.9 years
STANDARD_DEVIATION 3.24

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 2770 / 2470 / 275
other
Total, other adverse events
173 / 277106 / 247151 / 275
serious
Total, serious adverse events
7 / 27719 / 24718 / 275

Outcome results

Primary

Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 104

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for dysmenorrhea declined from baseline to Week 104 by at least 2.8 points without increased use of protocol-specified analgesics for pelvic pain at Week 104 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 10484.8 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 10483.0 percentage of participants
Placebo (Group C)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 10480.4 percentage of participants
Primary

Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 52

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for dysmenorrhea declined from baseline to Week 52 by at least 2.8 points without increased use of protocol-specified analgesics for pelvic pain at Week 52 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 5284.8 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 5282.2 percentage of participants
Placebo (Group C)Percentage Of Participants Who Meet The Dysmenorrhea Responder Criteria At Week 5275.6 percentage of participants
Primary

Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 104

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for NMPP declined from baseline to Week 104 by at least 2.1 points without increased use of protocol-specified analgesics for pelvic pain at Week 104 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 10475.8 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 10471.7 percentage of participants
Placebo (Group C)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 10473.1 percentage of participants
Primary

Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 52

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. A participant was defined as a responder if the NRS score for NMPP declined from baseline to Week 52 by at least 2.1 points without increased use of protocol-specified analgesics for pelvic pain at Week 52 relative to baseline. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 5273.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 5270.4 percentage of participants
Placebo (Group C)Percentage Of Participants Who Meet The NMPP Responder Criteria At Week 5268.0 percentage of participants
Secondary

Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 104

Assessed using the participant-modified Biberoglu and Behrman 4-point scale for pelvic pain recorded daily in an electronic diary. Participants reported their pain daily in an electronic diary using the following response options: Severe (requires strong analgesics), Moderate (noticeable pelvic pain), Mild (occasional pelvic pain), or No pain (no pain during past 24 hours). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 104-1.2 score on a scaleStandard Error 0.05
Relugolix Plus Delayed E2/NETA (Group B)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 104-1.1 score on a scaleStandard Error 0.05
Placebo (Group C)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 104-1.1 score on a scaleStandard Error 0.05
Secondary

Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 52

Assessed using the participant-modified Biberoglu and Behrman 4-point scale for pelvic pain recorded daily in an electronic diary. Participants reported their pain daily in an electronic diary using the following response options: Severe (requires strong analgesics), Moderate (noticeable pelvic pain), Mild (occasional pelvic pain), or No pain (no pain during past 24 hours). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 52-1.0 score on a scaleStandard Error 0.04
Relugolix Plus Delayed E2/NETA (Group B)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 52-1.0 score on a scaleStandard Error 0.05
Placebo (Group C)Change From Pivotal Phase 3 Study Baseline In NMPP Functional Impairment Score At Week 52-1.0 score on a scaleStandard Error 0.04
Secondary

Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 104

Blood samples were collected from participants for estradiol measurements at each specified timepoints. Estradiol concentrations were measured using an immuno-enzymatic assay based on a commercially available kit.

Time frame: Week 104

Population: Extension Safety Population: all enrolled participants who received any amount of open-label study drug in MVT-601-3103. Study results are reported by pivotal study treatment, but all participants only received relugolix Plus E2/NETA. The number of participants analyzed represents the proportion of the participants with values at that time point.

ArmMeasureValue (MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 104-51.72 pg/mLStandard Deviation 106.801
Relugolix Plus Delayed E2/NETA (Group B)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 104-74.68 pg/mLStandard Deviation 138.84
Placebo (Group C)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 104-64.39 pg/mLStandard Deviation 104.463
Secondary

Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 52

Blood samples were collected from participants for estradiol measurements at each specified timepoints. Estradiol concentrations were measured using an immuno-enzymatic assay based on a commercially available kit.

Time frame: Week 52

Population: Extension Safety Population: all enrolled participants who received any amount of open-label study drug in MVT-601-3103. Study results are reported by pivotal study treatment, but all participants only received relugolix Plus E2/NETA. The number of participants analyzed represents the proportion of the participants with values at that time point.

ArmMeasureValue (MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 52-55.22 pg/mLStandard Deviation 99.636
Relugolix Plus Delayed E2/NETA (Group B)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 52-77.76 pg/mLStandard Deviation 125.791
Placebo (Group C)Change From Pivotal Phase 3 Study Baseline In Predose Serum Concentrations Of Estradiol At Week 52-62.07 pg/mLStandard Deviation 90.031
Secondary

Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 104

Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dysmenorrhea recorded daily in an electronic diary. Participants were to report their pain as related to functional impairment daily in an electronic diary using the following response options: Severe (in bed all day, incapacitation), Moderate (in bed part of the day, some loss of work efficiency), Mild (some loss of work efficiency), No pain (no pain associated with menstruation during past 24 hours), or did not menstruate during the past 24 hours. Participants gave a possible score of 0 (no pain) to 4 (did not menstruate). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 104-1.3 score on a scaleStandard Error 0.04
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 104-1.3 score on a scaleStandard Error 0.05
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 104-1.2 score on a scaleStandard Error 0.04
Secondary

Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 52

Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dysmenorrhea recorded daily in an electronic diary. Participants were to report their pain as related to functional impairment daily in an electronic diary using the following response options: Severe (in bed all day, incapacitation), Moderate (in bed part of the day, some loss of work efficiency), Mild (some loss of work efficiency), No pain (no pain associated with menstruation during past 24 hours), or did not menstruate during the past 24 hours. Participants gave a possible score of 0 (no pain) to 4 (did not menstruate). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 52-1.3 score on a scaleStandard Error 0.04
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 52-1.3 score on a scaleStandard Error 0.04
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Dysmenorrhea Functional Impairment Score At Week 52-1.2 score on a scaleStandard Error 0.04
Secondary

Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104

Assessed using the following non-pain domains of the EHP-30 questionnaire: Control and Powerlessness (questions 12 through 17), Emotional Well-Being (questions 18 through 23), Social Support (questions 24 through 27), and Self-Image (questions 28 through 30). The score for each domain ranged from 0 to 100. Higher scores represent a greater impact of endometriosis. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Social Support-33.2 score on a scaleStandard Error 1.85
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Control and Powerlessness-47.5 score on a scaleStandard Error 1.59
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Emotional Well-being-30.7 score on a scaleStandard Error 1.6
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Self Image-29.5 score on a scaleStandard Error 1.88
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Self Image-25.8 score on a scaleStandard Error 1.94
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Emotional Well-being-26.5 score on a scaleStandard Error 1.65
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Social Support-24.9 score on a scaleStandard Error 1.9
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Control and Powerlessness-43.7 score on a scaleStandard Error 1.63
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Control and Powerlessness-41.9 score on a scaleStandard Error 1.54
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Social Support-29.7 score on a scaleStandard Error 1.8
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Self Image-25.2 score on a scaleStandard Error 1.83
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 104Emotional Well-being-25.6 score on a scaleStandard Error 1.56
Secondary

Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52

Assessed using the following non-pain domains of the EHP-30 questionnaire: Control and Powerlessness (questions 12 through 17), Emotional Well-Being (questions 18 through 23), Social Support (questions 24 through 27), and Self-Image (questions 28 through 30). The score for each domain ranged from 0 to 100. Higher scores represent a greater impact of endometriosis. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Control and Powerlessness-43.7 score on a scaleStandard Error 1.61
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Emotional Well-being-26.7 score on a scaleStandard Error 1.51
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Social Support-28.8 score on a scaleStandard Error 1.69
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Self Image-26.4 score on a scaleStandard Error 1.7
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Self Image-23.1 score on a scaleStandard Error 1.75
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Control and Powerlessness-40.1 score on a scaleStandard Error 1.66
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Social Support-28.9 score on a scaleStandard Error 1.74
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Emotional Well-being-24.4 score on a scaleStandard Error 1.56
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Self Image-22.8 score on a scaleStandard Error 1.68
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Emotional Well-being-23.7 score on a scaleStandard Error 1.49
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Social Support-28.7 score on a scaleStandard Error 1.67
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Each Of The Non-Pain EHP-30 Domains At Week 52Control and Powerlessness-39.5 score on a scaleStandard Error 1.59
Secondary

Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 104

The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix pus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 104-1.9 score on a scaleStandard Error 0.07
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 104-1.9 score on a scaleStandard Error 0.07
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 104-1.8 score on a scaleStandard Error 0.07
Secondary

Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 52

The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix pus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 52-1.6 score on a scaleStandard Error 0.06
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 52-1.6 score on a scaleStandard Error 0.06
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Function Impairment On The PGA For Function At Week 52-1.6 score on a scaleStandard Error 0.06
Secondary

Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 104

The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 104-1.4 score on a scaleStandard Error 0.07
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 104-1.4 score on a scaleStandard Error 0.07
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 104-1.3 score on a scaleStandard Error 0.07
Secondary

Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 52

The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 52-1.3 score on a scaleStandard Error 0.06
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 52-1.2 score on a scaleStandard Error 0.06
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In Severity Scores On The Patient Global Assessment (PGA) For Overall Pelvic Pain At Week 52-1.2 score on a scaleStandard Error 0.06
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 104

Assessed using the pain domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain. The least squares (LS) mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 104-41.3 score on a scaleStandard Error 1.33
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 104-38.9 score on a scaleStandard Error 1.36
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 104-37.7 score on a scaleStandard Error 1.29
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 52

Assessed using the pain domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain. The least squares (LS) mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 52-37.7 score on a scaleStandard Error 1.34
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 52-36.1 score on a scaleStandard Error 1.37
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Endometriosis Health Profile (EHP)-30 Pain Domain Scores At Week 52-35.1 score on a scaleStandard Error 1.32
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 104

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 104-5.9 score on a scaleStandard Error 0.17
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 104-5.7 score on a scaleStandard Error 0.18
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 104-5.6 score on a scaleStandard Error 0.17
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 52

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 52-5.9 score on a scaleStandard Error 0.15
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 52-5.7 score on a scaleStandard Error 0.16
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dysmenorrhea NRS Score At Week 52-5.3 score on a scaleStandard Error 0.15
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 104

Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dyspareunia recorded daily in an electronic diary. Participants were to report their pain during intercourse daily using the following response options: Severe (avoids intercourse because of pain), Moderate (intercourse painful to the point of causing interruption), Mild (tolerated pain), No pain (no pain during intercourse), or No intercourse (no intercourse for other reasons). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 104-1.0 score on a scaleStandard Error 0.06
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 104-0.9 score on a scaleStandard Error 0.07
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 104-1.0 score on a scaleStandard Error 0.07
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 52

Assessed using the participant-modified Biberoglu and Behrman 5-point scale for dyspareunia recorded daily in an electronic diary. Participants were to report their pain during intercourse daily using the following response options: Severe (avoids intercourse because of pain), Moderate (intercourse painful to the point of causing interruption), Mild (tolerated pain), No pain (no pain during intercourse), or No intercourse (no intercourse for other reasons). Participants gave a possible score of 0 (no pain) to 3 (severe). The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 52-0.9 score on a scaleStandard Error 0.06
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 52-0.9 score on a scaleStandard Error 0.06
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia Functional Impairment At Week 52-0.8 score on a scaleStandard Error 0.06
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 104

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants were to report whether they had vaginal sexual intercourse and rated their level of pelvic pain during intercourse on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 104-3.5 score on a scaleStandard Error 0.21
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 104-2.9 score on a scaleStandard Error 0.22
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 104-3.4 score on a scaleStandard Error 0.21
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 52

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants were to report whether they had vaginal sexual intercourse and rated their level of pelvic pain during intercourse on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 52-3.3 score on a scaleStandard Error 0.18
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 52-3.0 score on a scaleStandard Error 0.19
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Dyspareunia NRS Scores At Week 52-3.0 score on a scaleStandard Error 0.18
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 104

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 104-4.0 score on a scaleStandard Error 0.16
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 104-3.5 score on a scaleStandard Error 0.17
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 104-3.8 score on a scaleStandard Error 0.16
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 52

Assessed using an NRS score (11-point scale) for pain recorded daily in an electronic diary. Participants rated their pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 52-3.6 score on a scaleStandard Error 0.15
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 52-3.4 score on a scaleStandard Error 0.16
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean NMPP NRS Score At Week 52-3.4 score on a scaleStandard Error 0.15
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 104

Assessed using an NRS score (11-point scale) for overall pain recorded daily in an electronic diary. Participants rated their overall pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 104-4.2 score on a scaleStandard Error 0.16
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 104-3.9 score on a scaleStandard Error 0.17
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 104-4.0 score on a scaleStandard Error 0.16
Secondary

Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 52

Assessed using an NRS score (11-point scale) for overall pain recorded daily in an electronic diary. Participants rated their overall pelvic pain on a scale from 0 to 10, with 0 indicating no pain and 10 indicating pain as bad as you can imagine. The LS mean was presented by pivotal study treatment group and by visit.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. TThe overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 52-3.9 score on a scaleStandard Error 0.15
Relugolix Plus Delayed E2/NETA (Group B)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 52-3.6 score on a scaleStandard Error 0.16
Placebo (Group C)Change From The Pivotal Phase 3 Study Baseline In The Mean Overall Pelvic Pain NRS Score At Week 52-3.6 score on a scaleStandard Error 0.15
Secondary

Percentage Of Participants Not Using Analgesics For Endometriosis-associated Pain At Week 104

Assessed based on usage of study-specified analgesics for endometriosis-associated pain recorded daily in an electronic diary. Participants received protocol-specified analgesics for treatment of endometriosis-associated pain as needed for pain but not prophylactically.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Not Using Analgesics For Endometriosis-associated Pain At Week 10475.1 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Not Using Analgesics For Endometriosis-associated Pain At Week 10476.5 percentage of participants
Placebo (Group C)Percentage Of Participants Not Using Analgesics For Endometriosis-associated Pain At Week 10476.0 percentage of participants
Secondary

Percentage Of Participants Not Using Opioids For Endometriosis-associated Pain At Week 104

Assessed based on usage of study-specified opioids for endometriosis-associated pain recorded daily in an electronic diary. Participants received protocol-specified opioids for treatment of endometriosis-associated pain as needed for pain but not prophylactically.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix Plus E2/NETA.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Not Using Opioids For Endometriosis-associated Pain At Week 10491.0 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Not Using Opioids For Endometriosis-associated Pain At Week 10488.3 percentage of participants
Placebo (Group C)Percentage Of Participants Not Using Opioids For Endometriosis-associated Pain At Week 10490.5 percentage of participants
Secondary

Percentage Of Participants Who Are Better Or Much Better On The Patient Global Impression Of Change (PGIC) For Dysmenorrhea At Week 52

The PGIC for dysmenorrhea is a 1-item questionnaire designed to assess participant's impression of change in the severity of pain during their menstrual cycle. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix Plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Are Better Or Much Better On The Patient Global Impression Of Change (PGIC) For Dysmenorrhea At Week 5289.1 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Are Better Or Much Better On The Patient Global Impression Of Change (PGIC) For Dysmenorrhea At Week 5287.1 percentage of participants
Placebo (Group C)Percentage Of Participants Who Are Better Or Much Better On The Patient Global Impression Of Change (PGIC) For Dysmenorrhea At Week 5283.0 percentage of participants
Secondary

Percentage Of Participants Who Are Better Or Much Better On The PGIC For Dyspareunia At Week 52

The PGIC for dyspareunia is a 1-item questionnaire designed to assess participant's impression of change in the severity of their pain during sexual intercourse. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Are Better Or Much Better On The PGIC For Dyspareunia At Week 5261.0 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Are Better Or Much Better On The PGIC For Dyspareunia At Week 5261.9 percentage of participants
Placebo (Group C)Percentage Of Participants Who Are Better Or Much Better On The PGIC For Dyspareunia At Week 5260.0 percentage of participants
Secondary

Percentage Of Participants Who Are Better Or Much Better On The PGIC For NMPP At Week 52

The PGIC for NMPP is a 1-item questionnaire designed to assess participant's impression of change in the severity of pain when they are not menstruating. The questionnaire used a 7-point response scale: much better, better, a little better, the same, a little worse, worse, or much worse.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Are Better Or Much Better On The PGIC For NMPP At Week 5285.5 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Are Better Or Much Better On The PGIC For NMPP At Week 5286.1 percentage of participants
Placebo (Group C)Percentage Of Participants Who Are Better Or Much Better On The PGIC For NMPP At Week 5279.1 percentage of participants
Secondary

Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 104

Assessed using the Pain Domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain.

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 10488.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 10485.4 percentage of participants
Placebo (Group C)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 10486.1 percentage of participants
Secondary

Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 52

Assessed using the Pain Domain of the EHP-30 questionnaire. The EHP-30 questionnaire was completed on an electronic tablet (eTablet) device. Participants reported the frequency (never, rarely, sometimes, often, and always) with which they had difficulty with activities such as standing, sitting, walking, sleeping, and performing jobs around the house because of pain. The Pain Domain normalized scores ranged from 0 to 100, with higher scores denoting greater functional impact of pain.

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 5283.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 5281.2 percentage of participants
Placebo (Group C)Percentage Of Participants Who Have A Reduction Of At Least 20 Points In The EHP-30 Pain Domain Scores From The Pivotal Phase 3 Study Baseline At Week 5279.5 percentage of participants
Secondary

Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104

The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4).

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Improvement (-1 to -4)92.7 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104No Change (0)6.7 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Deterioration (+1 to +4)0.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Deterioration (+1 to +4)0.7 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104No Change (0)7.3 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Improvement (-1 to -4)92.0 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Deterioration (+1 to +4)0 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104No Change (0)8.8 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 104Improvement (-1 to -4)91.2 percentage of participants
Secondary

Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52

The PGA for functional impairment is a 1-item questionnaire designed to assess participant's impression of how their pain affected their usual activities. The participants responded to the question: How much were your daily activities limited by endometriosis over the last 4 weeks? using a 5-point response scale; each response was given a numerical score: not at all (0), minimally (1), moderately (2), significantly (3), or very significantly (4).

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Improvement (-1 to -4)88.9 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Deterioration (+1 to +4)3.0 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52No Change (0)8.1 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Improvement (-1 to -4)86.9 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52No Change (0)12.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Deterioration (+1 to +4)0.5 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Deterioration (+1 to +4)3.9 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52No Change (0)10.0 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Function At Week 52Improvement (-1 to -4)86.1 percentage of participants
Secondary

Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104

The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4).

Time frame: Week 104

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104No Change (0)13.8 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Improvement (-1 to -4)85.5 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Deterioration (+1 to +4)0.6 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Deterioration (+1 to +4)2.1 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Improvement (-1 to -4)82.2 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104No Change (0)15.8 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104No Change (0)16.7 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Deterioration (+1 to +4)3.0 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 104Improvement (-1 to -4)80.4 percentage of participants
Secondary

Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52

The PGA for pelvic pain severity is a 1-item questionnaire designed to assess participant's impression of the severity of their pain. The questionnaire used a 5-point response scale; each response was given a numerical score: absent (0), mild (1), moderate (2), severe (3), or very severe (4).

Time frame: Week 52

Population: Extension Study Population: all participants who enrolled into MVT-601-3103 study and received any amount of open-label study drug in MVT-601-3103 study. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (NUMBER)
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52No Change (0)14.7 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Improvement (-1 to -4)81.5 percentage of participants
Relugolix Plus E2/NETA (Group A)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Deterioration (+1 to +4)3.9 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52No Change (0)26.2 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Improvement (-1 to -4)69.9 percentage of participants
Relugolix Plus Delayed E2/NETA (Group B)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Deterioration (+1 to +4)3.9 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Improvement (-1 to -4)72.6 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52Deterioration (+1 to +4)4.4 percentage of participants
Placebo (Group C)Percentage Of Participants With Improvement, No Change, Or Worsening From Baseline In PGA Score For Overall Pelvic Pain At Week 52No Change (0)23.0 percentage of participants
Secondary

Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104

Assessed by dual-energy X-ray absorptiometry (DXA) scan at lumbar spine, total hip, and femoral neck (same leg for each participant) at each designated time point. All participants who completed treatment or terminated from the study early were required to return for a 6-month post-treatment follow-up (PTFU) and a 12-month PTFU DXA scan (except if participant was beyond 14 months from last day on treatment). Participants were also to have clinical laboratory evaluations (vitamin D, thyroid stimulating hormone, parathyroid hormone, creatinine, calcium, and phosphorous) at the 6-month and 12-month PTFU only if the PTFU DXA scans showed a bone loss of ≥3% at the lumbar spine and/or total hip compared with the parent study baseline.

Time frame: Week 104

Population: Extension Safety Population: all enrolled participants who received any amount of open-label study drug in MVT-601-3103. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The overall number of participants analyzed represents the number of participants evaluable at that time point.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Femoral Neck0.24 percent changeStandard Error 0.325
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Lumbar Spine (L1-L4)-0.45 percent changeStandard Error 0.295
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Total Hip0.82 percent changeStandard Error 0.268
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Femoral Neck-0.44 percent changeStandard Error 0.341
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Lumbar Spine (L1-L4)-0.56 percent changeStandard Error 0.31
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Total Hip0.10 percent changeStandard Error 0.281
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Lumbar Spine (L1-L4)-0.09 percent changeStandard Error 0.292
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Total Hip0.69 percent changeStandard Error 0.267
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 104Femoral Neck-0.05 percent changeStandard Error 0.324
Secondary

Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52

Assessed by dual-energy X-ray absorptiometry (DXA) scan at lumbar spine, total hip, and femoral neck (same leg for each participant) at each designated time point. All participants who completed treatment or terminated from the study early were required to return for a 6-month post-treatment follow-up (PTFU) and a 12-month PTFU DXA scan (except if participant was beyond 14 months from last day on treatment). Participants were also to have clinical laboratory evaluations (vitamin D, thyroid stimulating hormone, parathyroid hormone, creatinine, calcium, and phosphorous) at the 6-month and 12-month PTFU only if the PTFU DXA scans showed a bone loss of ≥3% at the lumbar spine and/or total hip compared with the parent study baseline.

Time frame: Week 52

Population: Extension Safety Population: all enrolled participants who received any amount of open-label study drug in MVT-601-3103. Study results are reported by pivotal study treatment, but all participants only received relugolix plus E2/NETA. The number analyzed represents the proportion of the overall number of participants analyzed with values at that time point.

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Lumbar Spine (L1-L4)-0.69 percent changeStandard Error 0.241
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Femoral Neck-0.21 percent changeStandard Error 0.277
Relugolix Plus E2/NETA (Group A)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Total Hip-0.10 percent changeStandard Error 0.207
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Femoral Neck-0.84 percent changeStandard Error 0.294
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Total Hip-0.52 percent changeStandard Error 0.219
Relugolix Plus Delayed E2/NETA (Group B)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Lumbar Spine (L1-L4)-1.09 percent changeStandard Error 0.256
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Femoral Neck0.06 percent changeStandard Error 0.28
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Total Hip0.27 percent changeStandard Error 0.21
Placebo (Group C)Percent Change From The Pivotal Phase 3 Study Baseline In BMD At Lumbar Spine (L1-L4), Femoral Neck, And Total Hip At Week 52Lumbar Spine (L1-L4)-0.09 percent changeStandard Error 0.244

Source: ClinicalTrials.gov · Data processed: Feb 22, 2026