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Sponsors and Collaborators: |
Creighton University GlaxoSmithKline |
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Information provided by: | Creighton University |
ClinicalTrials.gov Identifier: | NCT00352170 |
This study is designed to test whether calcium supplementation alone or calcium plus vitamin D reduces the incidence of fractures, reduces high parathyroid secretory activity, and halts bone loss in a population-based sample of women 55+ years of age.
Condition | Intervention | Phase |
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Osteoporosis Secondary Hyperparathyroidism |
Dietary Supplement: calcium supplementation Dietary Supplement: calcium and vitamin D3 supplementation Dietary Supplement: Placebo |
Phase III |
Study Type: | Interventional |
Study Design: | Treatment, Randomized, Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Placebo Control, Parallel Assignment, Efficacy Study |
Official Title: | Calcium and Vitamin D Malnutrition in Elderly Women |
Enrollment: | 1180 |
Study Start Date: | May 2000 |
Study Completion Date: | July 2005 |
Primary Completion Date: | July 2005 (Final data collection date for primary outcome measure) |
Arms | Assigned Interventions |
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1: Experimental
calcium supplementation
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Dietary Supplement: calcium supplementation
calcium carbonate 1500 mg/day
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2: Experimental
calcium and vitamin D3 supplementation
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Dietary Supplement: calcium and vitamin D3 supplementation
calcium carbonate 1500 mg/day vitamin D3 1000 IU/day
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3: Experimental
placebo
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Dietary Supplement: Placebo
calcium and vitamin D3 placebo
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We are conducting a 4-year randomized, double-blind, placebo controlled trial of calcium or calcium with vitamin D supplementation. We randomly sampled the population of healthy, independent living women 55+ years in nine rural counties. We randomly assigned 1180 women to one of three groups: Group 1 receives calcium (1400 mg/d) and vitamin D placebo, Group 2 receives both calcium (1400 mg/d) and vitamin D (1100 IU/d) and Group 3 receives both placebos.
A full-service market research firm randomly selected telephone numbers from all households with listed numbers in the nine-county rural sample area. The firm continued calling until 1180 women were selected who met the inclusion and exclusion criteria and were willing to participate in a four year prospective study of calcium and vitamin D supplementation. The participants were enrolled into study between May 2000 and July 2001.
Participants have study visits every six months. Annually the following are performed: bone density scans, height and weight, brief medical history including medicine changes, fracture surveillance, and compliance with calcium and vitamin D. At baseline and end of study, spine x-rays and dietary recall were obtained.
Ages Eligible for Study: | 55 Years and older |
Genders Eligible for Study: | Female |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria: healthy women ages 55 and older who were at least four years postmenopausal living independently in a nine-county rural area of Nebraska
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Exclusion Criteria:
1) chronic kidney disease, 2) Paget's metabolic bone disease, and 3) history of cancer except for superficial basal or squamous cell carcinoma of the skin and
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Responsible Party: | Creighton University ( Joan M. Lappe ) |
Study ID Numbers: | Ag14683 |
Study First Received: | July 12, 2006 |
Last Updated: | August 8, 2008 |
ClinicalTrials.gov Identifier: | NCT00352170 |
Health Authority: | United States: Federal Government; United States: Food and Drug Administration |
calcium vitamin D secondary hyperparathyroidism osteoporotic fractures |
Cholecalciferol Parathyroid Diseases Fractures, Bone Ergocalciferols Osteoporosis Endocrine System Diseases Bone Diseases, Metabolic Calcium Carbonate Bone Diseases |
Calcium, Dietary Hyperparathyroidism, Secondary Vitamin D Malnutrition Hyperparathyroidism Musculoskeletal Diseases Neoplasm Metastasis Nutrition Disorders Endocrinopathy |
Neoplasms Neoplastic Processes Pathologic Processes Growth Substances Vitamins |
Physiological Effects of Drugs Bone Density Conservation Agents Micronutrients Pharmacologic Actions |