Exercise-related AmenorrheaPhase 3NCT00946192
Fat Mediated Modulation of Reproductive and Endocrine Function in Young Athletes
A Phase 3 study testing Transdermal 17Beta-estradiol, progesterone and Ethinyl Estradiol + Desogestrel in people with Exercise-related Amenorrhea, run by Massachusetts General Hospital at 1 site in United States.
Trial summary
One aim of this study is to determine changes in body composition and hormones that differentiate athletes who stop getting their periods versus those who continue to get their periods and non-athletes. Read more about this study
- Who is it for?
- Ages 14 to 21 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Exercise-related Amenorrhea
- What is being tested?
- Transdermal 17Beta-estradiol, progesterone and Ethinyl Estradiol + Desogestrel
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 121 participants
- Where
- 1 siteUnited States
- Study dates
- May 2009to Apr 2021
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 14 to 21 years
- Women only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Females 14-21 years old Note: Our pilot data are reassuring in that young women 18-25 years old with hypothalamic amenorrhea are not adversely affected with estrogen use. In fact, in our prospective study, beneficial effects were observed both in young women 18-25 years old using oral estrogen, and in 14-18 year old adolescent girls using transdermal estrogen. We therefore feel that including girls in the 14-21 year age range will not be hazardous to their bone health. In fact, given the lack of data in this age group, it is important to study younger women and teenagers rather than extrapolate data from studies in adults to this younger population. Hormone dynamics differ in teenagers compared with adults, and bone mass accrual is even more dependent on estrogen and IGF-1 in younger than older women who have already achieved peak bone mass.
- Bone age (BA) >15 years Note: 99% of adult height is achieved at a BA of 15 years, thus estrogen replacement will not result in stunting of height potential after this age. Although we could have chosen to include girls with a BA >14 in this study, we are limiting this to girls with a BA of >15 years. This is because 2% of growth potential persists at a BA of 14 years, versus only 1% at a BA of 15 years (~0.6" of potential height (130)). Thus, to avoid potential stunting of growth potential with estrogen replacement, we have chosen to include girls with BA of > 15 years.
- BMI between 10th-90th percentiles for age.
- Amenorrhea (for AA): absence of menses for > three months (74) within a period of oligomenorrhea (cycle length > six weeks) for >six months, or absence of menarche at >16 years.
- Eumenorrhea (EA and controls): > nine menses (cycle length 21-35 days) in preceding year.
- Non-athlete healthy controls will be eligible if weight bearing exercise activity is less than two hours a week and if they are not participating in organized team sports.
- Endurance athletes Note: severity of low BMD and menstrual dysfunction differ by kind of exercise and activity. For example, runners have a higher prevalence of menstrual irregularity than swimmers and cyclists (131). By limiting enrollment to endurance athletes, we will eliminate variability from the type of activity. Endurance training is defined as > 4 h of aerobic weight-bearing training of the legs or specific endurance training weekly, or > 20 miles of running weekly for a period of > 6 months in the last year.
Who cannot join
- Other conditions that may affect bone metabolism
Trial locations and contacts
1 site in 1 country.
United States1 site
Massachusetts General Hospital
Boston, Massachusetts, 02114
About this study
One aim of this study is to determine changes in body composition and hormones that differentiate athletes who stop getting their periods versus those who continue to get their periods and non-athletes. The second aim of this study is to determine whether transdermal or oral estrogen (versus no estrogen) is effective in increasing bone density and improving bone microarchitecture in adolescent athletes who are not getting their periods and are thus estrogen deficient. The investigators hypothesize that transdermal estrogen will be more effective than oral estrogen or no estrogen in improving bone health in amenorrheic adolescent athletes.
Read the detailed description
As many as 25% of adolescent and young adult endurance athletes develop amenorrhea, and factors that cause amenorrhea to occur in some, but not all, athletes have not been well characterized. Recent data indicate the critical importance of a negative energy balance state and leptin in regulating the Hypothalamic-pituitary-gonadal (H-P-G) axis. However, these factors do not completely account for alterations in this axis, and other contributing factors are unclear. Our preliminary data indicate the importance of low fat mass and fat related hormones in mediating hypogonadism in young athletes. This study will confirm these data and determine whether low fat mass and altered levels of adipokines, such as leptin and adiponectin, and hormones regulated by fat mass, such as ghrelin and peptide YY (PYY), determine alterations in LH pulsatility. A very concerning impact of amenorrhea in athletes is low bone mineral density (BMD). Preliminary data indicate lower BMD in adolescent athletes with amenorrhea (AA) compared with eumenorrheic athletes (EA) and non-athletic controls. The high prevalence of AA in adolescents is particularly concerning, because this population is potentially at greater risk as it is actively accruing bone. Of importance, bone microarchitecture, a better predictor of bone strength than BMD, has not been studied in AA. Because pubertal increases in estrogen are integral to optimizing peak bone mass, and AA is characterized by hypoestrogenism, this randomized study of transdermal estrogen versus oral estrogen or no estrogen will also examine whether estrogen replacement increases BMD and improves bone microarchitecture in adolescent AA 14-21 years old. EA and sedentary controls will be followed without intervention for this period. Despite the prevalent practice of prescribing oral contraceptives in AA, there is a paucity of data regarding benefits of this intervention in teenagers. Because transdermal estrogen, unlike oral estrogen, does not suppress IGF-1, an important bone anabolic factor, we expect effects of transdermal estrogen to exceed those of oral estrogen or no therapy. In addition, preliminary data indicate that low fat mass and alterations in fat related hormones may contribute to decreased bone accrual rates in athletes, and will be confirmed in this study. To summarize, a better understanding of the pathophysiology of reproductive dysfunction is critical to develop therapeutic strategies that will normalize the reproductive axis and bone accrual, and these are the questions that this study aims to answer.
- Conditions
- Exercise-related Amenorrhea
- Being tested
- Transdermal 17Beta-estradiol, progesterone, Ethinyl Estradiol + Desogestrel, Sham Comparator
- Keywords
- Amenorrhea, Adolescent, Endurance, Athletes, Females, Osteopenia, Osteoporosis, Estrogen
- Medical subject headings
- Amenorrhea, Bone Diseases, Metabolic, Osteoporosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Transdermal 17Beta-estradiol, progesteroneDrug
Also called Vivelle Dot transdermal patch, Prometrium
100 mcg/day 17Beta-estradiol; transdermal twice weekly application for 12 months (with cyclic micronized progesterone pills (Prometrium): 200 mg taken orally daily Day 1 to Day 12 each month) + Elemental calcium 1200 mg and Vit D 400 IU taken orally daily
Ethinyl Estradiol + DesogestrelDrug
Also called Apri
Oral ethinyl estradiol (0.03 mg) + desogestrel (0.15 mg) + Elemental calcium 1200 mg and Vit D 400 IU taken once daily
Sham ComparatorDietary supplement
Elemental calcium 1200 mg and Vit D 400 IU taken orally daily
| Study group | Role | What they receive |
|---|---|---|
| Estrogen Patch | Experimental | 17Beta-estradiol transdermal patch twice weekly application for 12 months Receives: Drug: Transdermal 17Beta-estradiol, progesterone |
| Estrogen Pill | Active comparator | One pill containing estrogen and progesterone taken daily for 21 days followed by placebo pills only for 7 days; regimen repeated for 12 months. Receives: Drug: Ethinyl Estradiol + Desogestrel |
| Control | Sham comparator | Elemental calcium 1200 mg and Vit D 400 IU taken orally daily Receives: Dietary Supplement: Sham Comparator |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Lumbar Bone Mineral Density
Change in bone density with transdermal estrogen versus oral estrogen or no estrogen in amenorrheic athletes
Measured: 12 months
Secondary outcomes (1)
Change in Total Volumetric Bone Mineral Density (Tibia)
Change in total volumetric bone density at the tibia with transdermal estrogen versus oral estrogen or no estrogen in amenorrheic athletes
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jul 2009 (estimated)
- Study startMay 2009
- Primary completionFeb 2020
- Study completionApr 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for Exercise-related AmenorrheaStudies of the same condition, open and under way.
- More trials run by Massachusetts General HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 121 participants (actual)
Sponsor and investigators
- Lead sponsor
- Massachusetts General Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Responsible party
- Principal investigator, Madhusmita Misra, Massachusetts General Hospital
- Investigators
- Madhusmita Misra, MD, MPH, Principal investigator, Massachusetts General Hospital Pediatric Neuroendocrine Unit and Harvard Medical School
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00946192
- Sponsor's protocol ID
- 2009P000353
- Other IDs
- R01HD060827-01A1
- Status last verified
- Jun 2021
- First submitted
- 22 Jul 2009
- Last updated
- 11 Jun 2021
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Ackerman KE, Singhal V, Slattery M, Eddy KT, Bouxsein ML, Lee H, Klibanski A, Misra M. Effects of Estrogen Replacement on Bone Geometry and Microarchitecture in Adolescent and Young Adult Oligoamenorrheic Athletes: A Randomized Trial. J Bone Miner Res. 2020 Feb;35(2):248-260. doi: 10.1002/jbmr.3887. Epub 2019 Nov 7.
PubMed 31603998Plessow F, Singhal V, Toth AT, Micali N, Eddy KT, Misra M. Estrogen administration improves the trajectory of eating disorder pathology in oligo-amenorrheic athletes: A randomized controlled trial. Psychoneuroendocrinology. 2019 Apr;102:273-280. doi: 10.1016/j.psyneuen.2018.11.013. Epub 2018 Nov 16.
PubMed 30639922Singhal V, Ackerman KE, Bose A, Flores LPT, Lee H, Misra M. Impact of Route of Estrogen Administration on Bone Turnover Markers in Oligoamenorrheic Athletes and Its Mediators. J Clin Endocrinol Metab. 2019 May 1;104(5):1449-1458. doi: 10.1210/jc.2018-02143.
PubMed 30476179Ackerman KE, Singhal V, Baskaran C, Slattery M, Campoverde Reyes KJ, Toth A, Eddy KT, Bouxsein ML, Lee H, Klibanski A, Misra M. Oestrogen replacement improves bone mineral density in oligo-amenorrhoeic athletes: a randomised clinical trial. Br J Sports Med. 2019 Feb;53(4):229-236. doi: 10.1136/bjsports-2018-099723. Epub 2018 Oct 9.
PubMed 30301734Baskaran C, Cunningham B, Plessow F, Singhal V, Woolley R, Ackerman KE, Slattery M, Lee H, Lawson EA, Eddy K, Misra M. Estrogen Replacement Improves Verbal Memory and Executive Control in Oligomenorrheic/Amenorrheic Athletes in a Randomized Controlled Trial. J Clin Psychiatry. 2017 May;78(5):e490-e497. doi: 10.4088/JCP.15m10544.
PubMed 28297591Ackerman KE, Slusarz K, Guereca G, Pierce L, Slattery M, Mendes N, Herzog DB, Misra M. Higher ghrelin and lower leptin secretion are associated with lower LH secretion in young amenorrheic athletes compared with eumenorrheic athletes and controls. Am J Physiol Endocrinol Metab. 2012 Apr 1;302(7):E800-6. doi: 10.1152/ajpendo.00598.2011. Epub 2012 Jan 17.
PubMed 22252944Ackerman KE, Nazem T, Chapko D, Russell M, Mendes N, Taylor AP, Bouxsein ML, Misra M. Bone microarchitecture is impaired in adolescent amenorrheic athletes compared with eumenorrheic athletes and nonathletic controls. J Clin Endocrinol Metab. 2011 Oct;96(10):3123-33. doi: 10.1210/jc.2011-1614. Epub 2011 Aug 3.
PubMed 21816790
Study at a glance
From the registry record, last updated by the sponsor on 11 Jun 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Fat Mediated Modulation of Reproductive and Endocrine Function in Young Athletes
- ClinicalTrials.gov ID
- NCT00946192
- Acronym / sponsor ID
- 2009P000353
- Conditions
- Exercise-related Amenorrhea
- Keywords
- Amenorrhea, Adolescent, Endurance, Athletes, Females, Osteopenia, Osteoporosis, Estrogen
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 121 participants (actual)
- Lead sponsor
- Massachusetts General HospitalUniversity, hospital or other
- Collaborators
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Study start
- May 2009 (actual)
- Primary completion
- Feb 2020 (actual)
- Study completion
- Apr 2021 (actual)
- First posted
- 24 Jul 2009 (estimated)
- Results
- Posted 18 Mar 2020
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
One aim of this study is to determine changes in body composition and hormones that differentiate athletes who stop getting their periods versus those who continue to get their periods and non-athletes. The second aim of this study is to determine whether transdermal or oral estrogen (versus no estrogen) is effective in increasing bone density and improving bone microarchitecture in adolescent athletes who are not getting their periods and are thus estrogen deficient. The investigators hypothesize that transdermal estrogen will be more effective than oral estrogen or no estrogen in improving bone health in amenorrheic adolescent athletes.
Detailed description
As many as 25% of adolescent and young adult endurance athletes develop amenorrhea, and factors that cause amenorrhea to occur in some, but not all, athletes have not been well characterized. Recent data indicate the critical importance of a negative energy balance state and leptin in regulating the Hypothalamic-pituitary-gonadal (H-P-G) axis. However, these factors do not completely account for alterations in this axis, and other contributing factors are unclear. Our preliminary data indicate the importance of low fat mass and fat related hormones in mediating hypogonadism in young athletes. This study will confirm these data and determine whether low fat mass and altered levels of adipokines, such as leptin and adiponectin, and hormones regulated by fat mass, such as ghrelin and peptide YY (PYY), determine alterations in LH pulsatility. A very concerning impact of amenorrhea in athletes is low bone mineral density (BMD). Preliminary data indicate lower BMD in adolescent athletes with amenorrhea (AA) compared with eumenorrheic athletes (EA) and non-athletic controls. The high prevalence of AA in adolescents is particularly concerning, because this population is potentially at greater risk as it is actively accruing bone. Of importance, bone microarchitecture, a better predictor of bone strength than BMD, has not been studied in AA. Because pubertal increases in estrogen are integral to optimizing peak bone mass, and AA is characterized by hypoestrogenism, this randomized study of transdermal estrogen versus oral estrogen or no estrogen will also examine whether estrogen replacement increases BMD and improves bone microarchitecture in adolescent AA 14-21 years old. EA and sedentary controls will be followed without intervention for this period. Despite the prevalent practice of prescribing oral contraceptives in AA, there is a paucity of data regarding benefits of this intervention in teenagers. Because transdermal estrogen, unlike oral estrogen, does not suppress IGF-1, an important bone anabolic factor, we expect effects of transdermal estrogen to exceed those of oral estrogen or no therapy. In addition, preliminary data indicate that low fat mass and alterations in fat related hormones may contribute to decreased bone accrual rates in athletes, and will be confirmed in this study. To summarize, a better understanding of the pathophysiology of reproductive dysfunction is critical to develop therapeutic strategies that will normalize the reproductive axis and bone accrual, and these are the questions that this study aims to answer.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Estrogen Patch | Experimental | Drug: Transdermal 17Beta-estradiol, progesterone17Beta-estradiol transdermal patch twice weekly application for 12 months |
| Estrogen Pill | Active comparator | Drug: Ethinyl Estradiol + DesogestrelOne pill containing estrogen and progesterone taken daily for 21 days followed by placebo pills only for 7 days; regimen repeated for 12 months. |
| Control | Sham comparator | Dietary Supplement: Sham ComparatorElemental calcium 1200 mg and Vit D 400 IU taken orally daily |
Who may qualify
- Ages
- 14 to 21 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (7 listed)
- Females 14-21 years old Note: Our pilot data are reassuring in that young women 18-25 years old with hypothalamic amenorrhea are not adversely affected with estrogen use. In fact, in our prospective study, beneficial effects were observed both in young women 18-25 years old using oral estrogen, and in 14-18 year old adolescent girls using transdermal estrogen. We therefore feel that including girls in the 14-21 year age range will not be hazardous to their bone health. In fact, given the lack of data in this age group, it is important to study younger women and teenagers rather than extrapolate data from studies in adults to this younger population. Hormone dynamics differ in teenagers compared with adults, and bone mass accrual is even more dependent on estrogen and IGF-1 in younger than older women who have already achieved peak bone mass.
- Bone age (BA) >15 years Note: 99% of adult height is achieved at a BA of 15 years, thus estrogen replacement will not result in stunting of height potential after this age. Although we could have chosen to include girls with a BA >14 in this study, we are limiting this to girls with a BA of >15 years. This is because 2% of growth potential persists at a BA of 14 years, versus only 1% at a BA of 15 years (~0.6" of potential height (130)). Thus, to avoid potential stunting of growth potential with estrogen replacement, we have chosen to include girls with BA of > 15 years.
- BMI between 10th-90th percentiles for age.
- Amenorrhea (for AA): absence of menses for > three months (74) within a period of oligomenorrhea (cycle length > six weeks) for >six months, or absence of menarche at >16 years.
- Eumenorrhea (EA and controls): > nine menses (cycle length 21-35 days) in preceding year.
Key exclusion criteria (1 listed)
- Other conditions that may affect bone metabolism
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Transdermal 17Beta-estradiol, progesteroneAlso: Vivelle Dot transdermal patch, Prometrium100 mcg/day 17Beta-estradiol; transdermal twice weekly application for 12 months (with cyclic micronized progesterone pills (Prometrium): 200 mg taken orally daily Day 1 to Day 12 each month) + Elemental calcium 1200 mg and Vit D 400 IU taken orally daily | Drug | Estrogen Patch |
| Ethinyl Estradiol + DesogestrelAlso: ApriOral ethinyl estradiol (0.03 mg) + desogestrel (0.15 mg) + Elemental calcium 1200 mg and Vit D 400 IU taken once daily | Drug | Estrogen Pill |
| Sham ComparatorElemental calcium 1200 mg and Vit D 400 IU taken orally daily | Dietary supplement | Control |
Primary outcome
Change in Lumbar Bone Mineral Density
Time frame: 12 months
Change in bone density with transdermal estrogen versus oral estrogen or no estrogen in amenorrheic athletes
1 secondary outcome
Change in Total Volumetric Bone Mineral Density (Tibia)
Time frame: 12 months
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 Jun 2021.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 31603998Ackerman KE, Singhal V, Slattery M, Eddy KT, Bouxsein ML, Lee H, Klibanski A, Misra M. Effects of Estrogen Replacement on Bone Geometry and Microarchitecture in Adolescent and Young Adult Oligoamenorrheic Athletes: A Randomized Trial. J Bone Miner Res. 2020 Feb;35(2):248-260. doi: 10.1002/jbmr.3887. Epub 2019 Nov 7.
- Derived from this study: PubMed 30639922Plessow F, Singhal V, Toth AT, Micali N, Eddy KT, Misra M. Estrogen administration improves the trajectory of eating disorder pathology in oligo-amenorrheic athletes: A randomized controlled trial. Psychoneuroendocrinology. 2019 Apr;102:273-280. doi: 10.1016/j.psyneuen.2018.11.013. Epub 2018 Nov 16.
- Derived from this study: PubMed 30476179Singhal V, Ackerman KE, Bose A, Flores LPT, Lee H, Misra M. Impact of Route of Estrogen Administration on Bone Turnover Markers in Oligoamenorrheic Athletes and Its Mediators. J Clin Endocrinol Metab. 2019 May 1;104(5):1449-1458. doi: 10.1210/jc.2018-02143.
- Derived from this study: PubMed 30301734Ackerman KE, Singhal V, Baskaran C, Slattery M, Campoverde Reyes KJ, Toth A, Eddy KT, Bouxsein ML, Lee H, Klibanski A, Misra M. Oestrogen replacement improves bone mineral density in oligo-amenorrhoeic athletes: a randomised clinical trial. Br J Sports Med. 2019 Feb;53(4):229-236. doi: 10.1136/bjsports-2018-099723. Epub 2018 Oct 9.
- Derived from this study: PubMed 28297591Baskaran C, Cunningham B, Plessow F, Singhal V, Woolley R, Ackerman KE, Slattery M, Lee H, Lawson EA, Eddy K, Misra M. Estrogen Replacement Improves Verbal Memory and Executive Control in Oligomenorrheic/Amenorrheic Athletes in a Randomized Controlled Trial. J Clin Psychiatry. 2017 May;78(5):e490-e497. doi: 10.4088/JCP.15m10544.
- Derived from this study: PubMed 22252944Ackerman KE, Slusarz K, Guereca G, Pierce L, Slattery M, Mendes N, Herzog DB, Misra M. Higher ghrelin and lower leptin secretion are associated with lower LH secretion in young amenorrheic athletes compared with eumenorrheic athletes and controls. Am J Physiol Endocrinol Metab. 2012 Apr 1;302(7):E800-6. doi: 10.1152/ajpendo.00598.2011. Epub 2012 Jan 17.
- Derived from this study: PubMed 21816790Ackerman KE, Nazem T, Chapko D, Russell M, Mendes N, Taylor AP, Bouxsein ML, Misra M. Bone microarchitecture is impaired in adolescent amenorrheic athletes compared with eumenorrheic athletes and nonathletic controls. J Clin Endocrinol Metab. 2011 Oct;96(10):3123-33. doi: 10.1210/jc.2011-1614. Epub 2011 Aug 3.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Madhusmita Misra, MD, MPH principal investigator
Massachusetts General Hospital Pediatric Neuroendocrine Unit and Harvard Medical School
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Transdermal 17Beta-estradiol, progesterone and Ethinyl Estradiol + Desogestrel in people with Exercise-related Amenorrhea, run by Massachusetts General Hospital at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 11 Jun 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 18 Mar 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Lumbar Bone Mineral Density (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00946192, which also lists 7 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 Jun 2021.