BACKGROUND: Japanese GFR equation was developed from mainly chronic kidney disease (CKD) subjects. Only a small number of healthy subjects were included in the development and validation of the GFR equation. We assessed the performance of the equation in potential kidney donors. METHODS: A total of 113 potential kidney donors was included. The data of CKD subjects that were previously reported were also included for comparison. GFR (mGFR) was measured by inulin clearance. The estimated GFR (eGFR) was calculated by the Japanese GFR equation. Bias of the equation (eGFR - mGFR) and urinary creatinine excretion were evaluated. RESULTS: There was no significant difference between eGFR and mGFR in 340 CKD subjects (54.2 ± 31.6 and 55.7 ± 33.2 ml/min/1.73 m(2), respectively). Contrarily, the eGFR was significantly lower than mGFR in 113 potential kidney donors (78.9 ± 16.2 and 93.6 ± 19.2 ml/min/1.73 m(2), respectively). The biases in potential kidney donors with eGFR 30-59 and 60-89 ml/min/1.73 m(2) were significantly greater than those in CKD subjects (-19.2 ± 12.2 and -18.3 ± 16.4 ml/min/1.73 m(2) in potential kidney donors and -3.8 ± 15.6 and -3.4 ± 17.6 ml/min/1.73 m(2) in CKD subjects, respectively). Creatinine excretion per body weight of potential kidney donors was significantly higher than that of CKD subjects, suggesting higher creatinine generation in potential kidney donors. CONCLUSION: The Japanese GFR equation underestimated GFR in potential kidney donors. Higher creatinine generation compared with CKD subjects may contribute to the underestimation of GFR by the Japanese GFR equation in potential kidney donors.
BACKGROUND: Japanese GFR equation was developed from mainly chronic kidney disease (CKD) subjects. Only a small number of healthy subjects were included in the development and validation of the GFR equation. We assessed the performance of the equation in potential kidney donors. METHODS: A total of 113 potential kidney donors was included. The data of CKD subjects that were previously reported were also included for comparison. GFR (mGFR) was measured by inulin clearance. The estimated GFR (eGFR) was calculated by the Japanese GFR equation. Bias of the equation (eGFR - mGFR) and urinary creatinine excretion were evaluated. RESULTS: There was no significant difference between eGFR and mGFR in 340 CKD subjects (54.2 ± 31.6 and 55.7 ± 33.2 ml/min/1.73 m(2), respectively). Contrarily, the eGFR was significantly lower than mGFR in 113 potential kidney donors (78.9 ± 16.2 and 93.6 ± 19.2 ml/min/1.73 m(2), respectively). The biases in potential kidney donors with eGFR 30-59 and 60-89 ml/min/1.73 m(2) were significantly greater than those in CKD subjects (-19.2 ± 12.2 and -18.3 ± 16.4 ml/min/1.73 m(2) in potential kidney donors and -3.8 ± 15.6 and -3.4 ± 17.6 ml/min/1.73 m(2) in CKD subjects, respectively). Creatinine excretion per body weight of potential kidney donors was significantly higher than that of CKD subjects, suggesting higher creatinine generation in potential kidney donors. CONCLUSION: The Japanese GFR equation underestimated GFR in potential kidney donors. Higher creatinine generation compared with CKD subjects may contribute to the underestimation of GFR by the Japanese GFR equation in potential kidney donors.
Authors: Andrew D Rule; Timothy S Larson; Erik J Bergstralh; Jeff M Slezak; Steven J Jacobsen; Fernando G Cosio Journal: Ann Intern Med Date: 2004-12-21 Impact factor: 25.391
Authors: Navdeep Tangri; Lesley A Stevens; Christopher H Schmid; Yaping Lucy Zhang; Gerald J Beck; Tom Greene; Josef Coresh; Andrew S Levey Journal: Kidney Int Date: 2010-10-27 Impact factor: 10.612
Authors: Andrew S Levey; Josef Coresh; Tom Greene; Lesley A Stevens; Yaping Lucy Zhang; Stephen Hendriksen; John W Kusek; Frederick Van Lente Journal: Ann Intern Med Date: 2006-08-15 Impact factor: 25.391
Authors: Lesley A Stevens; Josef Coresh; Harold I Feldman; Tom Greene; James P Lash; Robert G Nelson; Mahboob Rahman; Amy E Deysher; Yaping Lucy Zhang; Christopher H Schmid; Andrew S Levey Journal: J Am Soc Nephrol Date: 2007-09-12 Impact factor: 10.121
Authors: Pierre Delanaye; Kitty J Jager; Arend Bökenkamp; Anders Christensson; Laurence Dubourg; Bjørn Odvar Eriksen; François Gaillard; Giovanni Gambaro; Markus van der Giet; Richard J Glassock; Olafur S Indridason; Marco van Londen; Christophe Mariat; Toralf Melsom; Olivier Moranne; Gunnar Nordin; Runolfur Palsson; Hans Pottel; Andrew D Rule; Elke Schaeffner; Maarten W Taal; Christine White; Anders Grubb; Jan A J G van den Brand Journal: J Am Soc Nephrol Date: 2019-09-10 Impact factor: 10.121