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CompletedNCT06716476Updated Dec 4, 2024

Impact of Vitamin D in Rheumatoid Arthritis

A Phase 4 interventional study of Vitamin D in Rheumatic Arthritis, sponsored by University of Pristina. Completed at 1 site in Kosovo. Open to participants aged 30 Years to 65 Years. Per ClinicalTrials.gov, last updated 2024-12-04.

Sponsored by University of Pristina · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Registered 2 years 8 months after the study started (first participant enrolled Mar 2022, registered Nov 2024).
Phase
Phase 4
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
30 Years to 65 Years
Sex
All
01

Study summary

The goal of this prospective, randomized, parallel-group design, double-blind, and 6-month follow-up is to evaluate the impact of 4000 IU/day vitamin D on 25-hydroxyvitamin D [25(OH)D] levels and inflammatory mediators in people with Rheumatoid Arthritis (RA).

The main questions it aims to answer are

  • The level of 25(OH)D and inflammatory mediators of levels of RA differs at baseline and after 6 months of Vitamin D 4000 UI
  • The disease activity of AR measured by visual analogue scale (VAS) and Disease Activity Score-28 (DAS-28 score) will change in baseline and after 6 months of Vitamin D 4000 UI Researchers will compare the group of participants with Vitamin D supplementation and group of participants without D Vitamin supplementation

Participants in active group will:

  • Take Vitamin D every day for 6 months
  • Visit the clinic in the first months and after 6 months for medical visits and tests.
Read the detailed description

Rheumatoid arthritis (RA) is an idiopathic autoimmune disease with a chronic course of exacerbations and remissions with more frequent incidence in females, characterized by inflammation, pain, and progressive damage to the joints. The main focus of our study is to evaluate the impact of Vitamin D besides other standard therapies in the group of people with RA, assessing the inflammatory mediators and clinical course of the disease in the baseline and after six months.

This is a prospective, randomized, controlled Trial (RCT) with a Parallel-Group Design, ensuring that changes in inflammation markers and disease activity over time will be measured simultaneously and independently.

Before enrolment, the research dossier, including the patient's informed consent, was submitted to the Medical Chamber of Kosovo Ethics Committee for approval. This professional body approved this study, and the approval letter was issued to the research team. Patients were included in the study only after signing the consent form and after being fully informed about the research.

The participants will be patients which fulfils the diagnostic criteria for Rheumatoid Arthritis (RA) of American college of Rheumatology (ACR)/European league against rheumatism (EULAR) - ACR/EULAR 2010. The cohort of participants will be elected after evaluation of inclusion and exclusion criteria of participants:

The trial participants will be enrolled from a cohort of people with RA disease treated at the University Clinical Centre of Kosovo-Rheumatology Clinic in Prishtina. The data will be collected for one year.

In both group of participants at the baseline will be measured the level of 25-hydroxyvitamin D [25(OH)D] and inflammatory mediators of RA: Interleukin 6 (IL6) , Interleukin 17 (IL17), CRP, TNF-alpha). Moreover, in both groups participants will be determined the activity of disease measuring the visual analogue scale (VAS) and Disease Activity Score-28 (DAS-28 score). The intervention group of participants will receive the Vitamin D supplementation for 6 months while other group of participants will not receive the Vitamin D and after 6 months will be evaluated level of [25(OH)D] and inflammatory mediators of RA: Interleukin 6 (IL6) , Interleukin 17 (IL17), CRP, TNF-alpha) and VAS and Das28 and compare with baseline data.

02

Conditions studied

  • Rheumatic Arthritis

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Keywords

  • Modulating Disease Activity and Inflammatory mediators
03

In context

Rheumatic Fever

55 studies on the registry are indexed under Rheumatic Fever; 21 are open to participants now.

This study's enrollment of 100 is above the median of 70 across 28 interventional studies indexed under Rheumatic Fever.

Browse Rheumatic Fever studies →

Lead sponsor

University of Pristina is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
30 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Inclusion criteria

  • Rheumatoid Arthritis Caucasian patients,
  • Kosovar ethnicity,
  • Both genders,

Inclusion criteria:

  • Patients with proven rheumatoid arthritis diagnosis ACR/EULAR 2010 grouped into four classifications with point scores for each:

    • joint symptoms;
    • serology (including RF and/or ACPA);
    • symptom duration, whether \<6 weeks or >6 weeks; and
    • acute-phase reactants (CRP and/or ESR). Point scores ≥6/10 was criteria for AR diagnosis;
  • RA disease duration 1-14 years

Exclusion criteria:

  • Other inflammatory diseases;
  • Thyroid and parathyroid diseases;
  • Liver and kidney disease;
  • Last 3 months treatment with Ca > 1g/per day;
  • Last 3 months treatment with vitamin D supplements
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
100 participants (actual)

Study arms

  • Active comparator
    Treatment with Vitamin D

    RA Patients with Vitamin D

    Drug: Vitamin D

  • No intervention
    No treatment with Vitamin D

    RA Patients without Vitamin D

Interventions

  • Supplemental with Vitamin D 4000 IU

06

What researchers measure

Primary outcomes

  1. Level of 25(OH)D in serum

    25(OH)D level in ng/mL (0-30 ng/mL)

    Time frame: 6 months

  2. Serum level of inflammatory mediators of RA (IL6, IL17, CRP, TNF-alpha)

    IL-6 pg/mL \< 12.0 IL-17 (pg/mL) \<1.4 pg/mL TNF Alpha (pg/mL) 4.6 - 12.4 pg/mL CRP (mg/l) \<6mg/L

    Time frame: 6 months

Secondary outcomes

  1. VAS: Visual analogue scale

    The Visual Analogue Scale (VAS) measures pain intensity. The measurement unit 0 - 10 unit. The VAS consists of a 10cm line, with two end points representing 0 ('no pain') and 10 ('pain as bad as it could possibly be')

    Time frame: 6 months

  2. DAS28: Disease Activity Score-28

    The DAS28 is a measure of disease activity in RA; an online tool collates a clinical assessment of 28 specified joints, serum inflammatory markers, and a visual analog scale (0-10) of the patient's global function. A score greater than 5.1 indicates active disease and less than 3.2 indicates well-controlled disease.

    Time frame: 6 months

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Study locations

1 site
  • Faculty of Medicine University of Prishtina
    Prishtina, 10000, Kosovo
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References and documents

Publications

  • Higgins MJ, Mackie SL, Thalayasingam N, Bingham SJ, Hamilton J, Kelly CA. The effect of vitamin D levels on the assessment of disease activity in rheumatoid arthritis. Clin Rheumatol. 2013 Jun;32(6):863-7. doi: 10.1007/s10067-013-2174-x. Epub 2013 Jan 23. PubMed 23340834 ↗
  • Chandrashekara S, Patted A. Role of vitamin D supplementation in improving disease activity in rheumatoid arthritis: An exploratory study. Int J Rheum Dis. 2017 Jul;20(7):825-831. doi: 10.1111/1756-185X.12770. Epub 2015 Oct 20. PubMed 26481198 ↗
  • Fassio A, Gatti D, Rossini M, Bertelle D, Bixio R, Viapiana O, Milleri S, Benini C, Pistillo F, Zanetti G, Adami G. Effects on Serum Inflammatory Cytokines of Cholecalciferol Supplementation in Healthy Subjects with Vitamin D Deficiency. Nutrients. 2022 Nov 14;14(22):4823. doi: 10.3390/nu14224823. PubMed 36432510 ↗
  • Adams JS, Hewison M. Unexpected actions of vitamin D: new perspectives on the regulation of innate and adaptive immunity. Nat Clin Pract Endocrinol Metab. 2008 Feb;4(2):80-90. doi: 10.1038/ncpendmet0716. PubMed 18212810 ↗
  • Al-Saoodi H, Kolahdooz F, Andersen JR, Jalili M. Effect of vitamin D on inflammatory and clinical outcomes in patients with rheumatoid arthritis: a systematic review and dose-response meta-analysis of randomized controlled trials. Nutr Rev. 2024 Apr 12;82(5):600-611. doi: 10.1093/nutrit/nuad083. PubMed 37437898 ↗
  • Steiner G, Van Hoovels L, Csige D, Gatto M, Iagnocco A, Szekanecz Z. Should ACR/EULAR criteria be revised changing the RF and ACPA scores? Autoimmun Rev. 2024 Jan;23(1):103421. doi: 10.1016/j.autrev.2023.103421. Epub 2023 Aug 24. PubMed 37633353 ↗

Individual participant data

Plan to share: Undecided

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 4, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06716476
Lead sponsor
University of Pristina
Responsible party
Shaip Krasniqi (Prof. Dr. Med. Shaip Krasniqi - Clinical Pharmacologist, University of Pristina) — Principal investigator
First posted
Dec 4, 2024
Start date
Mar 1, 2022
Primary completion
Mar 31, 2023
Completion
Jan 31, 2024
Last update
Dec 4, 2024

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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