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Vitamin D Supplementation on Physical and Cognitive Function-Pilot Study

This study is currently recruiting participants. (see Contacts and Locations)
Verified February 2017 by VA Office of Research and Development
Information provided by (Responsible Party):
VA Office of Research and Development Identifier:
First received: October 26, 2010
Last updated: February 17, 2017
Last verified: February 2017
This is a double-blind placebo controlled pilot study to determine if vitamin D supplementation in hemodialysis (HD) patients will improve physical function and cognition. HD patients have a high prevalence of vitamin D deficiency, cognitive impairment, and physical impairment. Despite standard clinical care with active IV vitamin D during dialysis, HD patients still have markedly low levels of nutritional or dietary vitamin D. IV treatment with vitamin D during dialysis is aimed at treating HD related bone disease. Recent literature shows that oral or nutritional vitamin D has multiple extra-skeletal effects including improvement in cognition and physical function. In this study, the investigators plan to administer oral vitamin D to vitamin D deficient HD patients already receiving standard care with IV vitamin D therapy. Patients will be randomized to receive either placebo or 50,000 IU of vitamin D (cholecalciferol) weekly for 6 months. The investigators' specific aims are to 1) Assess the benefits of correcting nutritional vitamin D deficiency on cognitive and physical function in HD patients receiving routine standard of care, 2) Assess the feasibility of recruiting HD patients for this study, and 3) Evaluate the proposed regimen for safely and effectively increasing nutritional vitamin D levels with oral supplementation. The investigators anticipate that correction of nutritional vitamin D deficiency to optimal levels will improve the high prevalence of cognitive impairment and physical impairment in this population. These results will be used as evidence to support a larger study aimed at treating nutritional vitamin D deficiency in all patients receiving HD. These results may also contribute to a change in current guidelines which place little emphasis on the monitoring and treatment of nutritional vitamin D levels in HD patients. These results are important for the Veteran dialysis population since many of them are required to perform high-level cognitive tasks such as management of complex medical regimens and physical tasks such as orchestrating independent transportation to and from HD sessions and multiple physician appointments.

Condition Intervention
Renal Dialysis
Vitamin D Deficiency
Dietary Supplement: Cholecalciferol (Vitamin D)

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Participant, Care Provider, Investigator, Outcomes Assessor
Primary Purpose: Treatment
Official Title: Vitamin D Supplementation on Physical and Cognitive Function-Pilot Study

Resource links provided by NLM:

Further study details as provided by VA Office of Research and Development:

Primary Outcome Measures:
  • Neuromuscular Function [ Time Frame: 6 months ]

Secondary Outcome Measures:
  • Quality-of-Life self assessment [ Time Frame: 6 months ]
  • Neuropsychological assessments [ Time Frame: 6 months ]
  • Immune Function assessments [ Time Frame: 6 months ]

Estimated Enrollment: 50
Actual Study Start Date: December 1, 2011
Estimated Study Completion Date: June 2018
Estimated Primary Completion Date: December 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Arm 1
Hemodialysis Patients randomized to take Vitamin D supplements
Dietary Supplement: Cholecalciferol (Vitamin D)
50,000 units of cholecalciferol or a placebo pill administered once a week for 6 months
Placebo Comparator: Arm 2
Hemodialysis Patients randomized to take placebo pills
Dietary Supplement: Cholecalciferol (Vitamin D)
50,000 units of cholecalciferol or a placebo pill administered once a week for 6 months

Detailed Description:






Ages Eligible for Study:   45 Years to 89 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Receiving HD for at least two weeks
  • Receiving IV vitamin D supplementation according to National Kidney Foundation guidelines.
  • Male or female with an between the ages of 45-89 years
  • Veteran outpatient or stable community living center patient
  • Able to ambulate independently or with an assistive device for at least 20 feet

Exclusion Criteria:

  • 25-OH vitamin D level < 25 ng/ml
  • Hypercalcemia
  • Active malignancy within 6 months
  • Receiving intravenous antibiotics for infection
  • History of Dementia
  • Hemoglobin < 8.5g
  • History of conditions that interfere with postural instability (e.g. cerebellar disease, vestibular disease or any others that may present)
  • Poor compliance with dialysis treatments (history of skipping 2 treatments per month for > 2 months)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01229878

Contact: Kel G Morin (718) 584-9000 ext 5129
Contact: James B Post, MD (718) 584-9000 ext 6635

United States, New York
James J. Peters VA Medical Center, Bronx, NY Recruiting
Bronx, New York, United States, 10468
Contact: Kel G Morin    718-584-9000 ext 5129   
Principal Investigator: James B Post, MD         
Sponsors and Collaborators
VA Office of Research and Development
Principal Investigator: James B Post, MD VA Office of Research and Development
  More Information

Responsible Party: VA Office of Research and Development Identifier: NCT01229878     History of Changes
Other Study ID Numbers: F7539-P
Study First Received: October 26, 2010
Last Updated: February 17, 2017
Individual Participant Data  
Plan to Share IPD: Undecided

Additional relevant MeSH terms:
Vitamin D Deficiency
Deficiency Diseases
Nutrition Disorders
Vitamin D
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents processed this record on May 25, 2017