The objective of this study is to evaluate safety and efficacy of elagolix in the management of moderate to severe endometriosis-associated pain in adult premenopausal female participants including the safety and efficacy of elagolix in combination with concomitant hormonal add-back therapy.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
681
Co-Primary Endpoint: Percentage of Participants With a Response for Dysmenorrhea (DYS) at Months 6 and 12 Based on Daily Assessment
Participants recorded rescue analgesic use for endometriosis-associated pain daily and DYS (pain during menstruation ) and its impact on daily activities each day of their period in an electronic diary (e-Diary). DYS was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over 35 days prior to each visit. Response was defined as a reduction of -0.92 or more from baseline in DYS as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesic).
Time frame: Month 6, Month 12
Co-Primary Endpoint: Percentage of Participants With a Response for Non-menstrual Pelvic Pain (NMPP) at Months 6 and 12 Based on Daily Assessment
Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed NMPP and its impact on their daily activities each day in an e-Diary was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit. Response was defined as a reduction of -0.55 or greater from baseline for NMPP as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average pill count of rescue analgesics and no additional analgesics).
Time frame: Month 6, Month 12
Change From Baseline in DYS at Month 12 Based on Daily Assessment
Participants assessed DYS (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary. DYS was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.
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Tablets
Central Research Associates /ID# 163087
Birmingham, Alabama, United States
Alabama Clinical Therapeutics, LLC /ID# 145503
Birmingham, Alabama, United States
Alabama Clinical Therapeutics, LLC /ID# 151468
Birmingham, Alabama, United States
Southern Women's Specialists PC /ID# 148750
Fairhope, Alabama, United States
Women's Health Alliance of Mobile /ID# 150083
Mobile, Alabama, United States
University of South Alabama /ID# 148774
Mobile, Alabama, United States
Mobile, Ob-Gyn, P.C. /ID# 145364
Mobile, Alabama, United States
Mesa Obstetricians and Gynecologists /ID# 147320
Mesa, Arizona, United States
Arizona Research Assoc /ID# 161703
Tucson, Arizona, United States
Eclipse Clinical Research /ID# 155600
Tucson, Arizona, United States
...and 187 more locations
Time frame: Baseline, Month 12
Change From Baseline in DYS at Month 6 Based on Daily Assessment
Participants assessed DYS (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary. DYS was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: 0: No discomfort 1. Mild discomfort but I was easily able to do the things I usually do 2. Moderate discomfort or pain that made it difficult to do some of the things I usually do 3. Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 6
Change From Baseline in DYS at Month 3 Based on Daily Assessment
Participants assessed DYS (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary. DYS was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: 0: No discomfort 1. Mild discomfort but I was easily able to do the things I usually do 2. Moderate discomfort or pain that made it difficult to do some of the things I usually do 3. Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 3
Change From Baseline in Non-menstrual Pelvic Pain (NMPP) at Month 12 Based on Daily Assessment
Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed NMPP and its impact on their daily activities each day in an e-Diary was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 12
Change From Baseline in NMPP at Month 6 Based on Daily Assessment
Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed NMPP and its impact on their daily activities each day in an e-Diary was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 6
Change From Baseline in NMPP at Month 3 Based on Daily Assessment
Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed NMPP and its impact on their daily activities each day in an e-Diary was measured by the 4-point Endometriosis Daily Pain Impact Diary according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 3
Change From Baseline to Month 6 in Patient-Reported Outcome Measurement Information System (PROMIS) Fatigue Short Form 6a T-Score
The PROMIS Fatigue Short Form 6a is self-administered and composed of 6 questions to evaluate fatigue over the past 7 days. All questions employ the following five response options: 1 = Never, 2 = Rarely, 3 = Sometimes, 4 = Often, and 5 = Always. The PROMIS Fatigue 6a score is calculated as a T-score, which is a standardized score with a mean of 50 (based on the average for the United States general population) and a standard deviation (SD) of 10. Higher scores indicate higher levels of fatigue. A decrease in score (negative change from baseline) indicates improvement in fatigue.
Time frame: Baseline, Month 6
Change From Baseline in Dyspareunia (DYSP) at Month 12 Based on Daily Assessment
Participants assessed DYSP each day in an e-Diary according to the following response options: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores were averaged over the 35 days prior to each visit. Responses of "Not Applicable" were excluded.
Time frame: Baseline, Month 12
Change From Baseline in DYSP at Month 6 Based on Daily Assessment
Participants assessed DYSP each day in an e-Diary according to the following response options: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores were averaged over the 35 days prior to each visit. Responses of "Not Applicable" were excluded.
Time frame: Baseline, Month 6
Change From Baseline in DYSP at Month 3 Based on Daily Assessment
Participants assessed DYSP each day in an e-Diary according to the following response options: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores were averaged over the 35 days prior to each visit. Responses of "Not Applicable" were excluded.
Time frame: Baseline, Month 3
Change From Baseline to Month 12 in Patient-Reported Outcome Measurement Information System (PROMIS) Fatigue Short Form 6a T-Score
The PROMIS Fatigue Short Form 6a is self-administered and composed of 6 questions to evaluate fatigue over the past 7 days. All questions employ the following five response options: 1 = Never, 2 = Rarely, 3 = Sometimes, 4 = Often, and 5 = Always. The PROMIS Fatigue 6a score is calculated as a T-score, which is a standardized score with a mean of 50 (based on the average for the United States general population) and a standard deviation (SD) of 10. Higher scores indicate higher levels of fatigue. A decrease in score (negative change from baseline) indicates improvement in fatigue.
Time frame: Baseline, Month 12
Change From Baseline in Endometriosis-Associated Pain Score at Month 12 Assessed With Numeric Rating Scale (NRS)
The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever. Site staff administered the Overall Endometriosis-Associated Pain questionnaire assessing pain over a 7-day recall period, and recorded the participant's response electronically via a tablet at the time of visit. Pain scores were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 12
Change From Baseline in Endometriosis-Associated Pain Score at Month 6 Assessed With NRS
The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever. Site staff administered the Overall Endometriosis-Associated Pain questionnaire assessing pain over a 7-day recall period, and recorded the participant's response electronically via a tablet at the time of visit. Pain scores were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 6
Change From Baseline in Endometriosis-Associated Pain Score at Month 3 Assessed With NRS
The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever. Site staff administered the Overall Endometriosis-Associated Pain questionnaire assessing pain over a 7-day recall period, and recorded the participant's response electronically via a tablet at the time of visit. Pain scores were averaged over the 35 days prior to each visit.
Time frame: Baseline, Month 3