Age-dependent Reference Intervals for Estimated and Measured Glomerular Filtration Rate

Overview

Journal Clin Kidney J

Publisher Oxford University Press

Specialty Nephrology

Date 2017 Aug 31

PMID 28852494

Citations 36

Authors

Hans Pottel

Pierre Delanaye

Laurent Weekers

Luciano Selistre

Karolien Goffin

Olivier Gheysens

Laurence Dubourg

Affiliations

Soon will be listed here.

Abstract

Background: Defining mean and reference intervals for glomerular filtration rate (GFR) has been the subject of only a limited number of studies and review articles, with contradicting statements about the mean. Normal measured GFR (mGFR) values of ∼120-130 mL/min/1.73 m have long been the referenced values for young adults but seem to be too high according to recent studies. Reference intervals are difficult to define because of the age decline of GFR, which is also observed in healthy subjects. Little data are available for subjects >70 years of age.

Methods: Based on the reference intervals for serum creatinine (SCr) and the recently published full-age spectrum (FAS) equation, we define simple age-dependent equations for the reference limits of GFR. The mGFR of 633 living potential kidney donors was used to validate the new formulae that define the reference interval.

Results: The reference limits for estimated GFR (eGFR), calculated by entering the reference limits for SCr into the FAS equation closely correspond with published reference limits for mGFR. Of the mGFRs of potential living kidney donors, 97.2% lie between the newly defined reference limits for GFR.

Conclusion: SCr reference limits may serve to define age-dependent reference limits for eGFR and mGFR.

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