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Progression of Osteoporosis After Kidney Transplantation in Patients With End-Stage Renal Disease
Authors:W.Y. Park  S. Han  B.S. Choi  C.W. Park  C.W. Yang  Y.-S. Kim  J.I. Kim  I.S. Moon  B.H. Chung
Affiliation:1. Transplant Research Center, Seoul St. Mary''s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea;2. Division of Nephrology, Department of Internal Medicine, Seoul St. Mary''s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea;3. Division of Vascular and Transplant Surgery, Department of Surgery, Seoul St. Mary''s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea;4. Kidney Institute, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
Abstract:

Background

This study investigated the prevalence of osteoporosis and the risk factors for its progression in kidney transplant recipients (KTRs).

Methods

Dual energy X-ray absorptiometry was used to prospectively measure changes in bone mineral density (BMD) before kidney transplantation (KT) and 1 year after transplantation in 207 individuals. We also analyzed the risk factors of osteoporosis progression during this period.

Results

Prior to KT, the mean BMD score (T-score of the femur neck area) was ?2.1 ± 1.2, and the prevalence of osteoporosis was 41.5% (86/207). At 1 year post-transplantation, the mean BMD score significantly decreased to ?2.3 ± 1.1 (P < .001), and the prevalence of osteoporosis increased to 47.3% (98/207; P = .277). The BMD score worsened over the study period in 69.1% (143/207) of patients, improved in 24.1% (50/207), and showed no change in 6.8% (14/207). Minimal intact parathyroid hormone (iPTH) improvement after KT was found to be an independent risk factor of osteoporosis progression.

Conclusions

This study demonstrates progressive loss of BMD after KT and sustained secondary hyperparathyroidism might influence the progression of osteoporosis.
Keywords:Address correspondence to Byung Ha Chung   MD   PhD   Department of Internal Medicine   Seoul St. Mary's Hospital   505 Banpo-Dong   Seocho-Ku   Seoul 137-040   Korea.
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