Pregnant Women with Inflammatory Bowel Disease are at Increased Risk of Vitamin D Insufficiency: A Cross-Sectional Study.
J Crohns Colitis. 2018 Mar 13;:
Authors: Lee S, Metcalfe A, Raman M, Leung Y, Aghajafari F, Letourneau N, Panaccione R, Kaplan GG, Seow CH
Background and Aims: Vitamin D insufficiency is prevalent in individuals with inflammatory bowel disease, as well as in pregnant women; however, the prevalence of vitamin D insufficiency in pregnant women with IBD is unknown. This study assessed the prevalence of vitamin D insufficiency in pregnant women with IBD and the adequacy of recommended supplementation.
Methods: A cross-sectional study was conducted in pregnant women with inflammatory bowel disease (Crohn’s disease=61, ulcerative colitis=41) and without inflammatory bowel disease (n=574). Chi-square tests and log binomial regression were used to examine the prevalence of vitamin D insufficiency. Covariates included ethnicity and season. Adequacy of vitamin D supplementation during pregnancy was also assessed.
Results: The prevalence of vitamin D insufficiency (25-OHD ≤75 nmol/L) in those with Crohn’s disease was 50.8% (95% CI: 38.4%-63.2%) and 60.9% (95% CI: 45.3%-74.7%) with ulcerative colitis compared to 17.4% (95% CI: 14.6%-20.8%) without inflammatory bowel disease. Women with inflammatory bowel disease were more likely to be vitamin D insufficient after adjusting for ethnicity and season (Crohn’s disease – adjusted relative risk [aRR]=2.98, 95% CI: 2.19-4.04; ulcerative colitis – aRR=3.61, 95% CI: 2.65-4.93). Despite vitamin D supplementation, 32.3% (95% CI: 17.8%-51.2%) with Crohn’s disease, 58.3% (95% CI: 37.1%-76.9%) with ulcerative colitis and 10.8% (95% CI: 6.9%-16.6%) without inflammatory bowel disease were still vitamin D insufficient.
Conclusions: Pregnant women with inflammatory bowel disease are at increased risk of vitamin D insufficiency compared with those without inflammatory bowel disease. The current guidelines for vitamin D supplementation may be inadequate for pregnant women with inflammatory bowel disease.
PMID: 29546360 [PubMed – as supplied by publisher]