Authors: Shamir Tuchman Heidi J Kalkwarf Babette S Zemel Justine Shults Rachel J Wetzsteon Debbie Foerster C Frederic Strife Mary B Leonard
Publish Date: 2010/09/26
Volume: 25, Issue: 12, Pages: 2509-2516
Abstract
The objectives were to determine the prevalence of vitamin D deficiency 25OHD 10 ng/ml in pediatric renal transplant RTx recipients compared with controls and identify correlates of changes in 25OHD and intact parathyroid hormone iPTH levels following transplantation Serum 25OHD 125OH2D and iPTH were measured once in 275 healthy controls and at transplantation and 3 and 12 months posttransplantation in 58 RTx recipients Multivariate logistic regression models determined the odds ratio OR of vitamin D deficiency in RTx recipients vs controls adjusted for age sex race and season Generalized estimating equations were used to assess changes following transplantation At transplantation 22 of nonblack and 27 of black RTx recipients were vitamin D deficient The adjusted OR of vitamin D deficiency was greater in RTx recipients p 0001 compared with controls however the transplant association was greater in nonblack vs black individuals interaction p = 002 Overall 25OHD levels did not change significantly following transplantation Younger age p 001 nonblack race p 0001 visits in nonwinter months p 0001 and supplementation with ≥400 IU/day ergo/cholecalciferol p 0001 were associated with increases or lesser declines in 25OHD following transplantation Increases in 25OHD levels p 0001 and vitamin D supplementation p 001 were associated with greater reductions in iPTH levels following transplantation independent of 125OH2D levelsWe greatly appreciate the dedication and enthusiasm of the children and their families who participated in this study Special thanks to Drs Bernard Kaplan Jorge Baluarte Kevin Meyers and Madhura Pradhan in the Division of Nephrology at CHOP Additional thanks to Drs Mark Mitsnefes and Prasad Devarajan in the Division of Nephrology and Ashwini RoyChaudhury in the Center for Health Quality at CCHMC
Keywords: