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Juvenile Rheumatoid Arthritis associated with low vitamin D, but how low – meta-analysis Jan 2013

What do we know about juvenile idiopathic arthritis and vitamin D? A systematic literature review and meta-analysis of current evidence.

Clin Rheumatol. 2013 Jan 8. https://doi.org/10.1007/s10067-012-2159-1
Nisar MK, Masood F, Cookson P, Sansome A, Ostör AJ.
Rheumatology Research Unit, Addenbrooke's Hospital, CUHNHSFT, Box 194, Cambridge, CB2 2QQ, UK, drnisar12 at yahoo.co.uk.

Over the last decade vitamin D (Vit D) has been the focus of considerable interest as a potential immunomodulator in a variety of conditions including autoimmune disease. Its influence in juvenile idiopathic arthritis (JIA) however is unclear. We therefore wished to clarify a possible link with the currently available evidence. A systematic literature review was undertaken using Embase, Cochrane and Medline for manuscripts up to May 2011. Search results were then assessed by two independent reviewers and relevant articles were further screened by full text review. Only those specifically reporting Vit D levels or its supplementation in JIA (ages between 0 and 18 years) were selected. Meta-analysis was performed where possible with those papers reporting similar data and analysis techniques. In total, 19 papers (n = 745) were included in the review.

  • Fourteen papers quoted 25(OH)D levels within their study groups with a mean of 24.56 ng/ml (range, 11.5-56.4 ng/ml) in a total of 529 children.
  • Eleven papers quoted 1,25(OH)(2)D levels with a mean of 31.09 pg/ml (range 6.1-65.0 pg/mol) in a total of 518 children.
  • Three studies reporting the prevalence of Vit D deficiency in their cohorts found that up to 82 % of children had insufficient levels.
  • Five papers reported Vit D levels by JIA subtype and showed lower levels of both 25(OH)D [mean 15.35, range 8.5-24.5 ng/ml] and 1,25(OH)(2)D [ mean 22.89, range 5.6-50 pg/ml] in systemic JIA.
  • Four papers reported Vit D supplementation in JIA however the treatment effect was unclear.

At present no clear evidence exists to support a link between Vit D level and JIA.
Furthermore, the role of Vit D supplementation in the management of JIA is lacking.
Despite Vit D levels appearing to be lower in JIA, interpretation is problematic as no agreed definition of Vit D deficiency exists in this population.
A need remains therefore to standardise Vit D levels in the paediatric population and in JIA.

PMID: 23296646 CLICK HERE to buy or rent the study from the publisher


Wikipedia

Juvenile idiopathic arthritis (JIA) (aka Juvenile Rheumatoid Arthritis JRA) is the most common form of arthritis in children and adolescents.

See also VitaminDWiki

Items in both categories Rheumatoid Arthritis and infant-Child are listed here:

See also web

Vitamin D Council (behind a $5/month paywall)
Report on a letter to editor Dec 2013
Finish children with active Juvenile idiopathic arthritis had higher level of vitamin D (26 ng) than those with inactive form (23 ng)
No attempt was made to see if the active group was taking vitamin D supplements

Juvenile idiopathic arthritis is not very prevalent

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