Replenishing and Maintaining Vitamin D Status in Older Adults in Residential Care Facilities in NI

Not Applicable

Suspended

• Conditions: Vitamin D Deficiency
• Interventions: Dietary Supplement: 3200IU Vitamin D3 per day for 8 weeks; Dietary Supplement: 20,000IU Vitamin D3 per week for 8 weeks

• Registration Number: NCT04395638
• Lead Sponsor: University of Ulster

Brief Summary

The vitamin D status of older adults in residential care facilities in Northern Ireland (NI) is currently unknown. An observation study is currently being carried out by Ulster University and the Western Health \& Social Care Trust (WHSCT) to provide data on the prevalence of vitamin-D deficiency among older adults within residential care facilities in NI. It is expected that some 40% of the cohort will be deficient in vitamin D and will require immediate replenishment of vitamin D status. Therefore, as a follow up to the observational study, an intervention study will be conducted, where participants identified as vitamin D deficient (25(OH)D) status \<30nmol/L (cut-off currently used by the WHSCT will be re-contacted and provided with a vitamin D supplement. The aim of this study is to investigate the dose and duration of vitamin D supplementation that is required to replenish and maintain vitamin D status in older adults with vitamin D deficiency within residential care facilities. Participants will be randomly assigned to receive one of two supplementation regimes: 3200IU/day vitamin D3 or 20,000IU/week vitamin D3. Blood samples (no more than 20ml per appointment) will be taken at 4 different time points: week 0, week 2, week 4 and week 8. These two doses are routinely used in clinical practice for remedial supplementation of vitamin D and have been chosen based upon their availability from manufacturers of vitamin D supplements. Also, albeit these doses are currently routinely used to replenish vitamin D status little is known on how effective they are and how soon vitamin D status is optimised. Clinicians can only administer medication for the management of osteoporosis (e.g. bisphosphonates) once vitamin D status is optimised. Therefore, measurements will be taken every two weeks to establish response to the remedial supplementation. This project provides a unique opportunity to monitor the replenishment and maintenance of vitamin D status following remedial supplementation more regularly (at weeks 0,2,4,8) than would be done under standard National Health Service care. This does and duration of vitamin D required to replenish vitamin D deficiency in older adults is currently ambiguous within the literature and clinical care.

Detailed Description

Not available

Study Timeline

• Status Verified: 2020-05
• Study First Submitted: 2020-05-11
• Study First Submitted QC: 2020-05-18
• Last Update Submitted: 2020-05-19
• Study First Posted: 2020-05-20
• Last Update Posted: 2020-05-21
• Study Start: 2020-09-01
• Primary Completion: 2021-02-28
• Study Completion: 2021-02-28

Recruitment & Eligibility

• Status: SUSPENDED
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

• Currently residing (≥1 month) within residential care facilities in Northern Ireland and who have previously undertaken the observation study (full title: A cross-sectional analysis of vitamin D status and bone health of older adults within residential care facilities in Northern Ireland) and have been identified as vitamin D deficient.

Exclusion Criteria

• Participants will be excluded from the study if by the judgement of the consultant rheumatologist that they have very abnormal bone or vitamin D metabolism due to conditions such as end stage renal failure or bone metastases.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Daily Vitamin D group	3200IU Vitamin D3 per day for 8 weeks	-
Weekly Vitamin D group	20,000IU Vitamin D3 per week for 8 weeks	-

Primary Outcome Measures

Name	Time	Method
Vitamin D status	Change between baseline (week 0 pre-intervention) and weeks 2, 4, 8 post-intervention	Plasma 25(OH)D status analysis by Liquid Chromatography / Mass Spec (LC/MS)

Secondary Outcome Measures

Name	Time	Method
Bone-specific alkaline phosphatase concentration	Change between baseline (week 0 pre-intervention) and weeks 2, 4, 8 post-intervention	Bone turnover marker
Osteocalcin concentration	Change between baseline (week 0 pre-intervention) and weeks 2, 4, 8 post-intervention	Bone turnover marker

Trial Locations

Locations (1)

Western Health and Social Care Trust Care Home facilities; 🇬🇧 Londonderry, Co.Londonderry, United Kingdom