Perinatal vitamin D levels are not associated with later risk of developing pediatric-onset inflammatory bowel disease: a Danish case-cohort study. (2nd August 2016)

• Record Type: Journal Article
• Authors: Thorsen, Steffen U.; Jakobsen, Christian; Cohen, Arieh; Lundqvist, Marika; Thygesen, Lau C.; Pipper, Christian; Ascherio, Alberto; Svensson, Jannet
• Is Part Of: Scandinavian journal of gastroenterology. Volume 51:Number 8(2016)
• Page Start: 927
• Page End: 933
• Publication Date: 2016-08-02
• Subjects: Autoimmunity -- epidemiology -- inflammatory bowel diseases -- vitamin D; Gastroenterology -- Periodicals; Digestive organs -- Diseases -- Periodicals; 616.33
• DOI: 10.3109/00365521.2016.1144218
• Languages: English
• ISSNs: 0036-5521

Abstract

ABSTRACT: Objective Basic and epidemiologic studies on inflammatory bowel disease (IBD) have suggested an association between vitamin D and IBD risk. Though, the literature on IBD – especially pediatric-onset IBD – and vitamin D is still in its cradle. We therefore wanted to examine if levels of 25(OH)D at birth were associated with increased risk of developing pediatric-onset IBD.Material and methods A case-cohort study composed of cases diagnosed with Crohn's disease, ulcerative colitis or indeterminate/unclassified colitis and healthy controls. Cases and controls were matched on date of birth and were born in the period 1981–2004. Cases were diagnosed before the age of 18 years. The concentration of 25(OH)D was assessed from neonatal dried blood spots using a highly sensitive liquid chromatography tandem mass spectrometry. Odds ratios (OR) were calculated using conditional logistic regression and two-way ANOVA were used to test for season and birth year 25(OH)D variations. A total of 384 matched pairs were included in the statistical analyses.Results No significant association were found between levels of 25(OH)D and IBD risk in the adjusted model (OR [95% CI] (per 25 nmol/L increase), 1.12 [0.88; 1.42], p = 0.35). 25(OH)D levels were found to fluctuate significantly with season ( p < 0.001) and year ( p < 0.001). Median/Q1–Q3 values for 25(OH)D were 27.1/16.5–39.5 nmol/L for cases and 25.7/16.1–39.4 nmol/L for controls.Conclusion Our study do not suggest that a window of vulnerability exist around time of birth in regards to 25(OH)D levels and later pediatric-onset IBD risk.