Including proteinuria in the NKF KDOQI staging system for chronic kidney disease will increase the accuracy of risk stratification, but will not improve the precision of glomerular filtration rate (GFR) estimation by prediction formulas. Using markers of glomerular filtration other than serum creatinine will hopefully enable implementation of novel formulas that more precisely estimate true GFR, especially in individuals with near-normal renal function.
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Ruggenenti, P., Remuzzi, G. Staging CKD: can we rely on estimated GFRs?. Nat Rev Nephrol 7, 307–308 (2011). https://doi.org/10.1038/nrneph.2011.58
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DOI: https://doi.org/10.1038/nrneph.2011.58