Table 1.

Equations to estimate GFR.

Equation	Year	Formula	Parameter
Cockcroft and Gault	1976	((140 − age) × weight)/(72 × Scr)	Age, sex, weight, serum creatinine
Modification of Diet in Renal Disease (MDRD)	1999	GFR = 175 × Serum Cr−1.154 × age−0.203 × 1.212 (if patient is black) × 0.742 (if female)	Age, sex, race, serum creatinine
Chronic Kidney Disease Epidemiology (CKD-EPI)-creatinine	2009	A × (Scr/B)C × 0.993age × (1.159 if black), where A, B, and C are the following: Female: if Scr ≤ 0.7: A = 144, B = 0.7 C = −0.329. if Scr > 0.7: A = 144, B = 0.7, C = −1.209. Male: if Scr ≤ 0.9: A = 141, B = 0.9 C = −0.411. if Scr > 0.9: A = 141, B = 0.9, C = −1.209	Age, sex, race, serum creatinine
Chronic Kidney Disease Epidemiology (CKD-EPI)-creatinine-cystatin C	2012	133 × (Scys/0.8)A × 0.996age × B, where A and B are the following: Female: if Scr ≤ 0.8: A = −0.499, B = 0.932 if Scr > 0.8: A = −0.499, B = 0.932. Male: if Scr ≤ 0.8: A = −0.499, B = 1.0 if Scr > 0.8: A = −0.499, B = 1.0	Age, sex, race, serum creatinine, serum cystatin C