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Background  In this study, we enrolled 862 patients with Crohn’s disease (CD) in China to investigate the correlation between serum vitamin D (SVD) and serum lipids, inflammatory biomarkers, and important clinical parameters.    Materials and Methods  25(OH)D was measured by LS/MS/MS. Correlation analysis, chi-square tests, and logistic regression analysis were performed to determine the correlations between vitamin D and potential risk factors when vitamin D levels were lower than 10 ng/mL or 20 ng/mL.    Results  The incidence of severe vitamin D deficiency (SVD &amp;lt; 10 ng/mL) in patients with CD was significantly higher than that in healthy controls (28.9 vs. 9.5%). Multinomial logistic regression analysis showed that penetrating disease [odds ratio (OR) = 2.18], low levels of high-density lipoprotein cholesterol (HDL) ( OR  = 1.91), high erythrocyte sedimentation rate ( OR  = 1.73), and platelet count (PLT) ( OR  = 2.71) were regarded as predictors of severe vitamin D deficiency, while only PLT ( OR  = 1.90) and HDL ( OR  = 1.76) were considered as predictors of mild vitamin D deficiency (SVD 10–20 ng/mL).    Conclusion  Our results confirm a higher incidence of severe vitamin D deficiency in patients with CD in China and show that vitamin D deficiency could result from the combined effects of penetrating disease, inflammation, and low levels of HDL.

frontiers in nutrition

Hypocholesterolemia and Inflammatory Biomarkers Act as Predictors of Severe Vitamin D Deficiency in Patients With Crohn’s Disease: A Clinical Analysis of 862 Patients in China