Skip Navigation LinksHome > November 2013 - Volume 57 - Issue 5 > Vitamin D Status and Bone Mineral Density in African America...
Journal of Pediatric Gastroenterology & Nutrition:
doi: 10.1097/MPG.0b013e31829e0b89
Original Articles: Gastroenterology

Vitamin D Status and Bone Mineral Density in African American Children With Crohn Disease

Middleton, Jeremy P.*; Bhagavathula, Anita P.*; Gaye, Bilkisu*; Alvarez, Jessica A.; Huang, Clifton S.*; Sauer, Cary G.*; Tenjarla, Gayathri*; Schoen, Bess T.*; Kumar, Archana*; Prasad, Mahadev*; Okou, David T.*; Ifeadike, Walter C.*; Dhere, Tanvi A.*; Conneely, Karen N.; Ziegler, Thomas R.; Tangpricha, Vin; Kugathasan, Subra*

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Abstract

Background: Vitamin D deficiency and low bone mineral density (BMD) are complications of inflammatory bowel disease. Vitamin D deficiency is more prevalent among African Americans compared with whites. There are little data comparing differences in serum 25-hydroxyvitamin D (25OHD) concentrations and BMD between African American and white children with Crohn disease (CD).

Methods: We compared serum 25OHD concentrations of African American children with CD (n = 52) to white children with CD (n = 64) and healthy African American controls (n = 40). We also analyzed BMD using dual-energy x-ray absorptiometry results from our pediatric CD population.

Results: African American children with CD had lower serum 25OHD concentrations (16.1 [95% confidence interval, CI 14.5–17.9] ng/mL) than whites with CD (22.3 [95% CI 20.2–24.6] ng/mL; P < 0.001). African Americans with CD and controls exhibited similar serum 25OHD concentration (16.1 [95% CI 14.5–17.9] vs 16.3 [95% CI 14.4–18.4] ng/mL; NS). African Americans with CD exhibited no difference in serum 25OHD concentration when controlling for seasonality, disease severity, and surgical history, although serum 25OHD concentration was significantly decreased in overweight children (body mass index ≥85%, P = 0.003). Multiple regression analysis demonstrated that obese African American girls with CD had the lowest serum 25OHD concentrations (9.6 [95% CI 6.8–13.5] ng/mL). BMD was comparable between African American and white children with CD (z score −0.4 ± 0.9 vs −0.7 ± 1.2; NS).

Conclusions: African American children with CD are more likely to have vitamin D deficiency compared with white children with CD, but have similar BMD. CD disease severity and history of surgery do not affect serum 25OHD concentrations among African American children with CD. African American children have low serum 25OHD concentrations, independent of CD, compared with white children. Future research should focus on how race affects vitamin D status and BMD in children with CD.

© 2013 by European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology,

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