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Transplantation:
doi: 10.1097/01.tp.0000438202.11971.2e
Clinical and Translational Research

Long-Term Progression of Abnormal Glucose Tolerance and Its Relationship With the Metabolic Syndrome After Kidney Transplantation

Nagaraja, Pramod1,3; Sharif, Adnan2; Ravindran, Vinod1; Baboolal, Keshwar1

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Abstract

Background

Metabolic syndrome (MS) diagnosed early after kidney transplantation is a risk factor for developing new-onset diabetes. The aim of this study was to examine whether glucose intolerance and MS identified late after transplantation influence the progression of glycemic abnormalities in kidney transplant recipients.

Methods

This is a retrospective study in which 76 non-diabetic renal transplant recipients underwent oral glucose tolerance tests (OGTT) in 2005 to 2006 (baseline) and then in 2011 to 2012 (follow-up). MS was identified using the International Diabetes Federation criteria and OGTT was interpreted according to the WHO classification.

Results

At follow-up, median time from transplantation was 11.1 years (range 6.2–23.8). Mean 0-hour and 2-hour plasma glucose levels were significantly higher at follow-up compared to baseline (5.7±0.7 vs. 5.9±0.9 mmol/L, P=0.03 and 6.7±1.9 vs. 7.5±2.8 mmol/L, P=0.03, respectively). The proportion of patients with an abnormal OGTT increased from 42% at baseline to 61% at follow-up (P=0.007). Patients with MS were more likely to progress to a higher degree of glucose intolerance compared to those without MS (58% vs. 27%, P=0.01). On multivariable logistic regression adjusted for age and gender, MS was significantly associated with the progression of glucose intolerance (OR 3.5, CI 1.2–9.9, P=0.01), as was a fasting glucose greater than 5.6 mmol/L (OR 4.8, CI 1.6–14.8, P=0.006).

Conclusion

MS is a risk factor for the progression of glucose intolerance in renal transplant recipients in the late posttransplant period. Therefore, MS has to be considered in tandem with OGTT results to assess cardiovascular risk.

Copyright © 2014 by Lippincott Williams & Wilkins

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