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Estimating glomerular filtration rate: Performance of the CKD-EPI equation over time in patients with type 2 diabetes. | LitMetric

Estimating glomerular filtration rate: Performance of the CKD-EPI equation over time in patients with type 2 diabetes.

J Diabetes Complications

Austin Health Endocrine Centre, Heidelberg, VIC, Australia; Department of Medicine Austin Health, The University of Melbourne, Melbourne, VIC, Australia; Menzies School of Health Research, Darwin, NT, Australia. Electronic address:

Published: October 2016

AI Article Synopsis

Article Abstract

Aims: To assess the performance of the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation at baseline and longitudinally in people with type 2 diabetes.

Methods: Adults with type 2 diabetes attending Austin Health, Melbourne, with≥3 prospective GFR measurements were included in this retrospective study. Plasma disappearance rate of DTPA (diethylene-triamine-penta-acetic acid) was used to calculate measured GFR (mGFR) and compared to estimated GFR (eGFR). The agreement between mGFR and eGFR was estimated using Intraclass Correlation Coefficient (ICC).

Results: 152 patients had a median of 4 (IQR: 3, 5) mGFR measurements over a period of 11years (IQR: 9, 12). The difference between mGFR and eGFR increased proportionally to the magnitude of the GFR, increasing by 0.2ml/min/1.73m(2) for every 1ml/min/1.73m(2) increase in mGFR, indicative of proportional bias. At lower mGFR levels, eGFR overestimated mGFR, and at higher mGFR levels, eGFR underestimated mGFR. There was a significant association between LDL cholesterol, triglycerides, HbA1c, diastolic blood pressure and the difference between mGFR and eGFR.

Conclusions: The CKD-EPI formula underestimates mGFR and the rate of decline of mGFR in patients with type 2 diabetes with an mGFR greater than 60ml/min/1.73m(2). The association between LDL cholesterol, triglycerides, HbA1c, diastolic blood pressure and the difference between mGFR and eGFR warrants further study.

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Source
http://dx.doi.org/10.1016/j.jdiacomp.2015.08.025DOI Listing

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