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Gut problems more likely if low vitamin D (IBD: 1.6, UC: 2.3) – meta-analysis Aug 2015

Association Between Inflammatory Bowel Disease and Vitamin D Deficiency: A Systematic Review and Meta-analysis.

Inflammatory Bowel Diseases: doi: 10.1097/MIB.0000000000000546
Del Pinto, Rita MD; Pietropaoli, Davide DDS, PhD; Chandar, Apoorva K. MBBS, MPH; Ferri, Claudio MD; Cominelli, Fabio MD, PhD

Background: Vitamin D plays a role in several immune-mediated diseases, but its association with inflammatory bowel disease (IBD) is unclear. We conducted a systematic review and meta-analysis to assess the association between IBD and vitamin D deficiency.

Methods: We searched electronic databases from inception to December 2014 for observational studies reporting the presence of vitamin D deficiency (defined as serum 25-hydroxycholecalciferol [25(OH)D] level of <=20 ng/mL) in IBD patients and having a control group without IBD. Odds ratios (ORs) were combined using a random-effects model. Meta-regression was performed using latitude as a moderator. Study quality was assessed using the Newcastle-Ottawa scale.

Results: Out of 816 citations, 14 eligible studies were identified, comprising 1891 participants (938 IBD cases and 953 controls). Meta-analysis showed that patients with

IBD had 64% higher odds of vitamin D deficiency when compared with controls (OR = 1.64; 95% confidence interval, 1.30-2.08; I2 = 7%; P < 0.0001).
Patients with ulcerative colitis had more than double the odds of vitamin D deficiency when compared with normal controls (OR = 2.28; 95% confidence interval, 1.18-4.41; I2 = 41%; P = 0.01).

Latitude did not influence the association between IBD and vitamin D deficiency (P = 0.34). Generalizability of our results might be limited as we summarized unadjusted ORs, because of nonavailability of adjusted ORs in individual studies.

Conclusions: IBD is significantly associated with having higher odds of vitamin D deficiency. Well-designed randomized controlled trials and longitudinal studies are needed to further explain the role of vitamin D in IBD pathogenesis and its therapy.

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Gut problems more likely if low vitamin D (IBD: 1.6, UC: 2.3) – meta-analysis Aug 2015

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- Ulcerative Colitis significantly reduced by 480,000 IU loading dose of nano Vitamin D – RCT July 2019 Ulcerative Colitis relapse 25 percent more likely if vitamin D level is lower than 35 ng – June 2016 IBD in Canadian children increasing 7% per year - Nov 2016

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