Homeostatic Model Assessment in Kidney Transplantation

Abstract

IntroductionLong-term kidney transplantation survival has been limited to cardiovascular-disease-associated death, which may be related to insulin resistance. The aim of this study is to evaluate the association between homeostatic model assessment (HOMA) and renal graft function. Materials and methodsFrom January 2013 to March 2015, 55 nondiabetic kidney recipients were reviewed retrospectively with their baseline fasting serum insulin and glucose levels as the basis the following indexes: 1. HOMA insulin resistance (HOMA-IR), 2. HOMA-β, and 3. insulin-glucose ratio (IGR). These patients were divided into 2 groups according to their HOMA indexes, and the serum creatinine (Cr) and estimated glomerular filtration rate (eGFR) were analyzed on the basis of every 6 months up to 3 years after kidney transplantation. Finally, we evaluate whether these HOMA indexes are a determinant factor of eGFR at post-transplant 1 year, 2 year, and 3 year. ResultsThere was no persisting difference in Cr and eGFR between high- and low-HOMA indexes except that the Cr and eGFR difference by HOMA-β stratification increased with time and became nearly significant at 3 years after transplantation. Further univariate and multivariate linear regression models showed no factor affected the 1-year eGFR independently, while weight affected the 2-year eGFR and only HOMA-β affected the 3-year eGFR independently. ConclusionIn non-diabetic kidney recipients, the eGFR difference between high- and low-HOMA-β patients increases over time. In multivariate linear regression, HOMA-β, but not HOMA-IR nor IGR, has independent significant association with eGFR at 3 years after transplantation.