Table of Contents
ISRN Obesity
Volume 2013 (2013), Article ID 284516, 7 pages
http://dx.doi.org/10.1155/2013/284516
Clinical Study

Vitamin D Deficiency Is Prevalent in Morbidly Obese Adolescents Prior to Bariatric Surgery

1Department of Pediatrics, Columbia University Medical Center, 622 West 168th Street, PH 5E-522, New York, NY 10032, USA
2Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA

Received 10 January 2013; Accepted 29 January 2013

Academic Editors: A. Erkner, S. A. Lear, E. K. Naderali, J. M. Robbins, and S. Straube

Copyright © 2013 Marisa Censani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Obese adults are frequently vitamin D deficient before bariatric surgery; whether similar abnormalities exist in morbidly obese adolescents is unknown. Objective. To determine the prevalence of vitamin D deficiency in morbidly obese adolescents. Methods. Cross-sectional study of preoperative laboratory measures from 236 adolescents evaluated for bariatric surgery. Results. The group ( with 25-hydroxyvitamin D (25OHD) and parathyroid hormone (PTH) levels; 76 boys, 143 girls; years; 43% Caucasian, 35% Hispanic, and 15% African American) had mean BMI of  kg/m2. 25OHD levels were deficient (<20 ng/mL) in 53%; 8% had severe deficiency (<10 ng/mL); only 18% of patients were replete (>30 ng/mL). 25OHD levels were inversely associated with BMI ( , ) and PTH levels ( , ). Race was the strongest predictor of 25OHD ( ); 82% of African Americans, 59% of Hispanics, and 37% of Caucasians were deficient. African American race, BMI, and PTH explained 21% of the variance in 25OHD ( ). Conclusions. Most adolescents presenting for bariatric surgery have suboptimal vitamin D levels, with African Americans and those with higher BMIs at greatest risk for vitamin D deficiency. All morbidly obese adolescents should be screened for vitamin D deficiency before bariatric procedures.