Glomerular Filtration Rate (GFR) - Creatinine-Cystatin C equation
Estimates of glomerular filtration rate (GFR) that are based on serum creatinine are routinely used; however, they are imprecise, potentially leading to the overdiagnosis of chronic kidney disease. Cystatin C is an alternative filtration marker for estimating GFR.
Research authors: Lesley A. Inker, Christopher H. Schmid, Hocine Tighiouart, John H. Eckfeldt, Harold I. Feldman, Tom Greene, John W. Kusek, Jane Manzi, Frederick Van Lente, Yaping Lucy Zhang, Josef Coresh, Andrew S. Levey
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Estimated Glomerular Filtration Rate is: mL/min/1.73m2

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Conditional information

The GFR was calculated using the creatinine-cystatin C equation, the GFR can be estimated using other formulas such as the cystatin C equation, the Cockcroft-Gault equation, or the MDRD equation. 

The glomerular filtration rate should only be assessed in a steady state condition for reliable results. 

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Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

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