Determine Effect of Vitamin D on Bone Health in Elderly African American WomenPhase 3NIHDNCT01153568
Vitamin D and Osteoporosis Prevention in Elderly African American Women
A Phase 3 study testing Vitamin D 3 in people with Determine Effect of Vitamin D on Bone Health in Elderly African American Women, run by Winthrop University Hospital at 1 site in United States.
Trial summary
Vitamin D is a hormone that is produced when sunlight is absorbed by the skin. Vitamin D insufficiency has been recognized as a problem in areas where sun exposure is limited, especially in the wintertime. In addition, the more pigmented the skin is, the less capable it is of utilizing sunlight to make vitamin D. Read more about this study
- Who is it for?
- Ages 60 years and older, women onlyHealthy volunteers can take part
- Conditions the study is for
- Determine Effect of Vitamin D on Bone Health in Elderly African American Women
- What is being tested?
- Vitamin D 3
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 260 participants
- Where
- 1 siteUnited States
- Study dates
- Aug 2010to Oct 2016
- Phase
- Phase 3
- Are there results?
- None posted in the registry
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 60 years and older
- Women only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Ambulatory women older than 60 years of age. Self declared as African Americans.
- 20 nmol/L < serum 25(OH)D level < 65 nmol/L.
- Willingness to take study drug and participate for four years in the trial.
- Willingness to refrain from the use of self-administered supplements during the trial.
Who cannot join
- Serum 25(OH)D levels ≤ 20 nmol/L or ≥ 65 nmol/L.
- BMD total hip below - 2.5 standard deviation (using NHANES III adult young white men and women as the point of reference) or history of osteoporotic fracture.
- Moderate to severe fracture in one or more vertebrae by Instant Vertebral Assessment on DXA.
- Treatment with HRT, SERMS, calcitonin, PTH, androgens, bisphosphonates, phosphate or anabolic steroids during 6 months prior to entry.
- Use of systemic corticosteroids (oral or IV) within the last year at an average dose of greater than 5 mg per day of oral prednisone or equivalent for a period of three months or more prior to screening.
- Hypercalcemia (serum calcium > 10.6 mg (dl) or history of primary hyperparathyroidism.
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- History of chronic liver disease, chronic renal insufficiency, Parkinson's, metabolic bone disease, hematologic tumors, rheumatologic disease requiring steroids, malabsorption or new diagnosis or active treat-ment of cancer 12 months prior to inclusion.
- Use of medications that influence bone metabolism (e.g. anticonvulsants).
- Significant deviation from normal in either: history, physical examination or laboratory tests as evaluated by the Principle Investigator. Participants with a history of hypercalciuria, nephrolithiasis and active sarcoidosis will also be excluded.
- Participation in another investigational trial 30 days prior to screening.
- Spinal disease that affects interpretation of bone densitometry like scoliosis with a Cobb angle greater than 15o, history of surgery at lumbosacral spine.
- Bilateral hip replacement.
- Currently smoking more than 10 cigarettes daily.
- Body width on DXA > 25 cm.
- Patients who are deemed unsafe to perform muscular function testing as evaluated by the investigator.
- ---------- Study participants should live close to the study site, as this study requires multiple visits over a four year period.
Trial locations and contacts
1 site in 1 country.
United States1 site
Winthrop University Hospital
Mineola, New York, 11501
About this study
Official title: Vitamin D and Osteoporosis Prevention in Elderly African American Women: A 4-year Randomized, Double-blind, Placebo-controlled Study to Investigate the Effect of Vitamin D Status in Elderly African American Women
Vitamin D is a hormone that is produced when sunlight is absorbed by the skin. Vitamin D insufficiency has been recognized as a problem in areas where sun exposure is limited, especially in the wintertime. In addition, the more pigmented the skin is, the less capable it is of utilizing sunlight to make vitamin D. Vitamin D plays an important role in helping the body absorb calcium and in building strong bones. It has also been shown to improve muscle function in the elderly. As we get older, our vitamin D levels in the blood go down and this may increase the risk for falls and fractures. If we can improve vitamin D status as we age, we may be able to improve muscle strength and decrease the risk of falls and fractures.
Read the detailed description
The long-term goal of this project is to develop strategies for the prevention of osteoporotic fractures in African Americans. Most intervention studies have excluded African Americans because of the erroneous belief that osteoporosis is not a major health problem in this population. In fact, the incidence rate of hip fracture in blacks is 50% of the rate in whites. Since longevity is increasing in the black population, osteoporotic fractures will become an even greater problem for this ethnic minority in the future. Furthermore, morbidity and mortality from osteoporotic fractures is greater in blacks. The elderly require higher intake of vitamin D to prevent bone loss resulting from secondary hyperparathyroidism. Calcium with sufficient vitamin D supplementation may decrease fractures in elderly white populations as a result of reduction in bone loss and falls (improved physical performance). The only fracture intervention study to include African Americans-the Women's Health Initiative-used an inadequate dose of vitamin D (400 IU), a dose unlikely to achieve the vitamin D status proposed by U.S. experts: serum 25 hydroxyvitamin D [25(OH)D] concentration above 75 nmol/L. No calcium/vitamin D intervention studies on fall prevention or physical performance have included African Americans.
As a result of increased skin pigmentation, blacks synthesize less vitamin D from sun exposure. As a result, serum 25(OH)D levels are often in the "insufficient" range. This is accompanied by secondary hyperparathyroidism, but adult blacks have a relative skeletal resistance to PTH, so that they have lower bone turnover. They also have more efficient renal conservation of calcium starting in childhood. Addition of vitamin D3 to a calcium-sufficient African American postmenopausal population does not prevent bone loss. The calcium/vitamin D requirements of black adults may be lower than white adults through midlife. However, the elderly require more vitamin D to produce the higher 25(OH)D levels required to overcome the hyperparathyroidism associated with aging. The skeleton of elderly African Americans appears to be susceptible to the increasing parathyroid hormone levels of old age. Bone loss accelerates and bone turnover markers increase in elderly African Americans just as in whites. The specific aims of this project are to determine if dietary supplementation with calcium/vitamin D will safely reduce bone loss and bone turnover and improve physical performance in elderly African Americans. We will enroll 250 African American women in a four-year vitamin D3 intervention trial where serum 25(OH)D will be maintained at an optimum level above 75 nmol/L. Adequate calcium intake will be ensured. Functional markers of vitamin D including bone density, serum PTH, and bone turnover will be measured. The NIH Conference on Vitamin D and Health in the 21st Century, September 5-6, 2007 concluded that research in this population is a high priority.
- Being tested
- Vitamin D 3, placebo
- Keywords
- Vitamin D, osteoporosis, african american women
- Medical subject headings
- Osteoporosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Vitamin D 3Dietary supplement
Patients will bew given a single capsule to take once daily
placeboOther
placebo tablets
| Study group | Role | What they receive |
|---|---|---|
| Placebo | Placebo comparator | placebo Receives: Other: placebo |
| Vitamin D 3 | Experimental | Vitamin D3 will be available in doses of 60, 90, 120, and 150 µg Receives: Dietary Supplement: Vitamin D 3 |
What is being measured
The primary outcome is the main question the study is designed to answer.
1. To determine if vitamin D supplementation sufficient to raise serum 25(OH)D levels above 75 nmol/L (30 ng/mL) for four years will reduce bone density loss, markers of bone turnover, and serum PTH in elderly black women
- To determine whether such supplementation will inhibit the decline in physical performance with aging.
Measured: 4 years
Secondary outcomes (1)
To evaluate the harms of vitamin D intakes that raise 25(OH)D levels above 75 nmol/L for four years in a calcium sufficient population
This research will fill an important gap in knowledge about the potential benefit of vitamin D supplementation in elderly black women. While many experts agree that vitamin D intake should be increased in the elderly, few pertinent studies have included black participants, who represent a vulnerable population due to their low serum 25(OH)D. If vitamin D supplementation proves to be beneficial in this minority group, that would suggest the appropriateness of intake recommendations similar to those proposed for white populations.
Measured: 4 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Jun 2010 (estimated)
- Study startAug 2010
- Primary completionOct 2016
- Study completionOct 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (19)Papers the sponsor has linked to this study.
- Other trials for Determine Effect of Vitamin D on Bone Health in Elderly African American WomenStudies of the same condition, open and under way.
- 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
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 260 participants (actual)
Sponsor and investigators
- Lead sponsor
- Winthrop University Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- National Institute on Aging (NIA)
- Responsible party
- Principal investigator, John F. Aloia, MD, Winthrop University Hospital
- Investigators
- John F. Aloia, MD, Principal investigator, Winthrop University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01153568
- Sponsor's protocol ID
- 08032
- Other IDs
- R01AG032440
- Acronym
- NIHD
- Status last verified
- Jun 2018
- First submitted
- 28 Jun 2010
- Last updated
- 3 Oct 2018
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Bischoff-Ferrari HA, Giovannucci E, Willett WC, Dietrich T, Dawson-Hughes B. Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes. Am J Clin Nutr. 2006 Jul;84(1):18-28. doi: 10.1093/ajcn/84.1.18.
PubMed 16825677Aloia JF, Vaswani A, Yeh JK, Flaster E. Risk for osteoporosis in black women. Calcif Tissue Int. 1996 Dec;59(6):415-23. doi: 10.1007/BF00369203.
PubMed 8939764Cauley JA, Lui LY, Stone KL, Hillier TA, Zmuda JM, Hochberg M, Beck TJ, Ensrud KE. Longitudinal study of changes in hip bone mineral density in Caucasian and African-American women. J Am Geriatr Soc. 2005 Feb;53(2):183-9. doi: 10.1111/j.1532-5415.2005.53101.x.
PubMed 15673339Tang BM, Eslick GD, Nowson C, Smith C, Bensoussan A. Use of calcium or calcium in combination with vitamin D supplementation to prevent fractures and bone loss in people aged 50 years and older: a meta-analysis. Lancet. 2007 Aug 25;370(9588):657-66. doi: 10.1016/S0140-6736(07)61342-7.
PubMed 17720017Vieth R, Ladak Y, Walfish PG. Age-related changes in the 25-hydroxyvitamin D versus parathyroid hormone relationship suggest a different reason why older adults require more vitamin D. J Clin Endocrinol Metab. 2003 Jan;88(1):185-91. doi: 10.1210/jc.2002-021064.
PubMed 12519850Bischoff-Ferrari HA, Willett WC, Wong JB, Giovannucci E, Dietrich T, Dawson-Hughes B. Fracture prevention with vitamin D supplementation: a meta-analysis of randomized controlled trials. JAMA. 2005 May 11;293(18):2257-64. doi: 10.1001/jama.293.18.2257.
PubMed 15886381Latham NK, Anderson CS, Lee A, Bennett DA, Moseley A, Cameron ID; Fitness Collaborative Group. A randomized, controlled trial of quadriceps resistance exercise and vitamin D in frail older people: the Frailty Interventions Trial in Elderly Subjects (FITNESS). J Am Geriatr Soc. 2003 Mar;51(3):291-9. doi: 10.1046/j.1532-5415.2003.51101.x.
PubMed 12588571MacLaughlin J, Holick MF. Aging decreases the capacity of human skin to produce vitamin D3. J Clin Invest. 1985 Oct;76(4):1536-8. doi: 10.1172/JCI112134.
PubMed 2997282Dawson-Hughes B, Heaney RP, Holick MF, Lips P, Meunier PJ, Vieth R. Estimates of optimal vitamin D status. Osteoporos Int. 2005 Jul;16(7):713-6. doi: 10.1007/s00198-005-1867-7. Epub 2005 Mar 18.
PubMed 15776217Vieth R, Bischoff-Ferrari H, Boucher BJ, Dawson-Hughes B, Garland CF, Heaney RP, Holick MF, Hollis BW, Lamberg-Allardt C, McGrath JJ, Norman AW, Scragg R, Whiting SJ, Willett WC, Zittermann A. The urgent need to recommend an intake of vitamin D that is effective. Am J Clin Nutr. 2007 Mar;85(3):649-50. doi: 10.1093/ajcn/85.3.649. No abstract available.
PubMed 17344484Visser M, Deeg DJ, Puts MT, Seidell JC, Lips P. Low serum concentrations of 25-hydroxyvitamin D in older persons and the risk of nursing home admission. Am J Clin Nutr. 2006 Sep;84(3):616-22; quiz 671-2. doi: 10.1093/ajcn/84.3.616.
PubMed 16960177Dhesi JK, Bearne LM, Moniz C, Hurley MV, Jackson SH, Swift CG, Allain TJ. Neuromuscular and psychomotor function in elderly subjects who fall and the relationship with vitamin D status. J Bone Miner Res. 2002 May;17(5):891-7. doi: 10.1359/jbmr.2002.17.5.891.
PubMed 12009020Bischoff HA, Stahelin HB, Dick W, Akos R, Knecht M, Salis C, Nebiker M, Theiler R, Pfeifer M, Begerow B, Lew RA, Conzelmann M. Effects of vitamin D and calcium supplementation on falls: a randomized controlled trial. J Bone Miner Res. 2003 Feb;18(2):343-51. doi: 10.1359/jbmr.2003.18.2.343.
PubMed 12568412Wicherts IS, van Schoor NM, Boeke AJ, Visser M, Deeg DJ, Smit J, Knol DL, Lips P. Vitamin D status predicts physical performance and its decline in older persons. J Clin Endocrinol Metab. 2007 Jun;92(6):2058-65. doi: 10.1210/jc.2006-1525. Epub 2007 Mar 6.
PubMed 17341569Bischoff-Ferrari HA, Dawson-Hughes B, Willett WC, Staehelin HB, Bazemore MG, Zee RY, Wong JB. Effect of Vitamin D on falls: a meta-analysis. JAMA. 2004 Apr 28;291(16):1999-2006. doi: 10.1001/jama.291.16.1999.
PubMed 15113819
Study at a glance
From the registry record, last updated by the sponsor on 3 Oct 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Vitamin D and Osteoporosis Prevention in Elderly African American Women: A 4-year Randomized, Double-blind, Placebo-controlled Study to Investigate the Effect of Vitamin D Status in Elderly African American Women
- ClinicalTrials.gov ID
- NCT01153568
- Acronym / sponsor ID
- NIHD / 08032
- Keywords
- Vitamin D, osteoporosis, african american women
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 260 participants (actual)
- Lead sponsor
- Winthrop University HospitalUniversity, hospital or other
- Collaborators
- National Institute on Aging (NIA)
- Study start
- Aug 2010
- Primary completion
- Oct 2016 (actual)
- Study completion
- Oct 2016 (actual)
- First posted
- 30 Jun 2010 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Vitamin D is a hormone that is produced when sunlight is absorbed by the skin. Vitamin D insufficiency has been recognized as a problem in areas where sun exposure is limited, especially in the wintertime. In addition, the more pigmented the skin is, the less capable it is of utilizing sunlight to make vitamin D. Vitamin D plays an important role in helping the body absorb calcium and in building strong bones. It has also been shown to improve muscle function in the elderly. As we get older, our vitamin D levels in the blood go down and this may increase the risk for falls and fractures. If we can improve vitamin D status as we age, we may be able to improve muscle strength and decrease the risk of falls and fractures.
Detailed description
The long-term goal of this project is to develop strategies for the prevention of osteoporotic fractures in African Americans. Most intervention studies have excluded African Americans because of the erroneous belief that osteoporosis is not a major health problem in this population. In fact, the incidence rate of hip fracture in blacks is 50% of the rate in whites. Since longevity is increasing in the black population, osteoporotic fractures will become an even greater problem for this ethnic minority in the future. Furthermore, morbidity and mortality from osteoporotic fractures is greater in blacks. The elderly require higher intake of vitamin D to prevent bone loss resulting from secondary hyperparathyroidism. Calcium with sufficient vitamin D supplementation may decrease fractures in elderly white populations as a result of reduction in bone loss and falls (improved physical performance). The only fracture intervention study to include African Americans-the Women's Health Initiative-used an inadequate dose of vitamin D (400 IU), a dose unlikely to achieve the vitamin D status proposed by U.S. experts: serum 25 hydroxyvitamin D [25(OH)D] concentration above 75 nmol/L. No calcium/vitamin D intervention studies on fall prevention or physical performance have included African Americans.
As a result of increased skin pigmentation, blacks synthesize less vitamin D from sun exposure. As a result, serum 25(OH)D levels are often in the "insufficient" range. This is accompanied by secondary hyperparathyroidism, but adult blacks have a relative skeletal resistance to PTH, so that they have lower bone turnover. They also have more efficient renal conservation of calcium starting in childhood. Addition of vitamin D3 to a calcium-sufficient African American postmenopausal population does not prevent bone loss. The calcium/vitamin D requirements of black adults may be lower than white adults through midlife. However, the elderly require more vitamin D to produce the higher 25(OH)D levels required to overcome the hyperparathyroidism associated with aging. The skeleton of elderly African Americans appears to be susceptible to the increasing parathyroid hormone levels of old age. Bone loss accelerates and bone turnover markers increase in elderly African Americans just as in whites. The specific aims of this project are to determine if dietary supplementation with calcium/vitamin D will safely reduce bone loss and bone turnover and improve physical performance in elderly African Americans. We will enroll 250 African American women in a four-year vitamin D3 intervention trial where serum 25(OH)D will be maintained at an optimum level above 75 nmol/L. Adequate calcium intake will be ensured. Functional markers of vitamin D including bone density, serum PTH, and bone turnover will be measured. The NIH Conference on Vitamin D and Health in the 21st Century, September 5-6, 2007 concluded that research in this population is a high priority.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Placebo | Placebo comparator | Other: placeboplacebo |
| Vitamin D 3 | Experimental | Dietary Supplement: Vitamin D 3Vitamin D3 will be available in doses of 60, 90, 120, and 150 µg |
Who may qualify
- Ages
- 60 years and older
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Ambulatory women older than 60 years of age. Self declared as African Americans.
- 20 nmol/L < serum 25(OH)D level < 65 nmol/L.
- Willingness to take study drug and participate for four years in the trial.
- Willingness to refrain from the use of self-administered supplements during the trial.
Key exclusion criteria (16 listed)
- Serum 25(OH)D levels ≤ 20 nmol/L or ≥ 65 nmol/L.
- BMD total hip below - 2.5 standard deviation (using NHANES III adult young white men and women as the point of reference) or history of osteoporotic fracture.
- Moderate to severe fracture in one or more vertebrae by Instant Vertebral Assessment on DXA.
- Treatment with HRT, SERMS, calcitonin, PTH, androgens, bisphosphonates, phosphate or anabolic steroids during 6 months prior to entry.
- Use of systemic corticosteroids (oral or IV) within the last year at an average dose of greater than 5 mg per day of oral prednisone or equivalent for a period of three months or more prior to screening.
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 |
|---|---|---|
| Vitamin D 3Patients will bew given a single capsule to take once daily | Dietary supplement | Vitamin D 3 |
| placeboplacebo tablets | Other | Placebo |
Primary outcome
1. To determine if vitamin D supplementation sufficient to raise serum 25(OH)D levels above 75 nmol/L (30 ng/mL) for four years will reduce bone density loss, markers of bone turnover, and serum PTH in elderly black women
Time frame: 4 years
2. To determine whether such supplementation will inhibit the decline in physical performance with aging.
1 secondary outcome
To evaluate the harms of vitamin D intakes that raise 25(OH)D levels above 75 nmol/L for four years in a calcium sufficient population
Time frame: 4 years
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Oct 2018.
- Background: PubMed 16825677Bischoff-Ferrari HA, Giovannucci E, Willett WC, Dietrich T, Dawson-Hughes B. Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes. Am J Clin Nutr. 2006 Jul;84(1):18-28. doi: 10.1093/ajcn/84.1.18.
- Background: PubMed 8939764Aloia JF, Vaswani A, Yeh JK, Flaster E. Risk for osteoporosis in black women. Calcif Tissue Int. 1996 Dec;59(6):415-23. doi: 10.1007/BF00369203.
- Background: PubMed 15673339Cauley JA, Lui LY, Stone KL, Hillier TA, Zmuda JM, Hochberg M, Beck TJ, Ensrud KE. Longitudinal study of changes in hip bone mineral density in Caucasian and African-American women. J Am Geriatr Soc. 2005 Feb;53(2):183-9. doi: 10.1111/j.1532-5415.2005.53101.x.
- Background: PubMed 17720017Tang BM, Eslick GD, Nowson C, Smith C, Bensoussan A. Use of calcium or calcium in combination with vitamin D supplementation to prevent fractures and bone loss in people aged 50 years and older: a meta-analysis. Lancet. 2007 Aug 25;370(9588):657-66. doi: 10.1016/S0140-6736(07)61342-7.
- Background: PubMed 12519850Vieth R, Ladak Y, Walfish PG. Age-related changes in the 25-hydroxyvitamin D versus parathyroid hormone relationship suggest a different reason why older adults require more vitamin D. J Clin Endocrinol Metab. 2003 Jan;88(1):185-91. doi: 10.1210/jc.2002-021064.
- Background: PubMed 15886381Bischoff-Ferrari HA, Willett WC, Wong JB, Giovannucci E, Dietrich T, Dawson-Hughes B. Fracture prevention with vitamin D supplementation: a meta-analysis of randomized controlled trials. JAMA. 2005 May 11;293(18):2257-64. doi: 10.1001/jama.293.18.2257.
- Background: PubMed 12588571Latham NK, Anderson CS, Lee A, Bennett DA, Moseley A, Cameron ID; Fitness Collaborative Group. A randomized, controlled trial of quadriceps resistance exercise and vitamin D in frail older people: the Frailty Interventions Trial in Elderly Subjects (FITNESS). J Am Geriatr Soc. 2003 Mar;51(3):291-9. doi: 10.1046/j.1532-5415.2003.51101.x.
- Background: PubMed 2997282MacLaughlin J, Holick MF. Aging decreases the capacity of human skin to produce vitamin D3. J Clin Invest. 1985 Oct;76(4):1536-8. doi: 10.1172/JCI112134.
- Background: PubMed 15776217Dawson-Hughes B, Heaney RP, Holick MF, Lips P, Meunier PJ, Vieth R. Estimates of optimal vitamin D status. Osteoporos Int. 2005 Jul;16(7):713-6. doi: 10.1007/s00198-005-1867-7. Epub 2005 Mar 18.
- Background: PubMed 17344484Vieth R, Bischoff-Ferrari H, Boucher BJ, Dawson-Hughes B, Garland CF, Heaney RP, Holick MF, Hollis BW, Lamberg-Allardt C, McGrath JJ, Norman AW, Scragg R, Whiting SJ, Willett WC, Zittermann A. The urgent need to recommend an intake of vitamin D that is effective. Am J Clin Nutr. 2007 Mar;85(3):649-50. doi: 10.1093/ajcn/85.3.649. No abstract available.
- Background: PubMed 16960177Visser M, Deeg DJ, Puts MT, Seidell JC, Lips P. Low serum concentrations of 25-hydroxyvitamin D in older persons and the risk of nursing home admission. Am J Clin Nutr. 2006 Sep;84(3):616-22; quiz 671-2. doi: 10.1093/ajcn/84.3.616.
- Background: PubMed 12009020Dhesi JK, Bearne LM, Moniz C, Hurley MV, Jackson SH, Swift CG, Allain TJ. Neuromuscular and psychomotor function in elderly subjects who fall and the relationship with vitamin D status. J Bone Miner Res. 2002 May;17(5):891-7. doi: 10.1359/jbmr.2002.17.5.891.
- National Osteoporosis FoundationLink provided by the sponsor.
- National Institute of Arthritis and Musculoskeletal and Skin DiseasesLink provided by the sponsor.
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.
John F. Aloia, MD principal investigator
Winthrop University Hospital
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 Vitamin D 3 in people with Determine Effect of Vitamin D on Bone Health in Elderly African American Women, run by Winthrop University 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 4 inclusion and 16 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 3 Oct 2018. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
1. To determine if vitamin D supplementation sufficient to raise serum 25(OH)D levels above 75 nmol/L (30 ng/mL) for four years will reduce bone density loss, markers of bone turnover, and serum PTH in elderly black women (time frame: 4 years). 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 NCT01153568, which also lists 19 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 3 Oct 2018.