. 2020 Jul 18;2020:2141038. doi: 10.1155/2020/2141038

Table 1.

CKD-EPI equations for GFR estimating.

Equation 1: serum creatinine ([5])
Gender	Creatinine (mg/dL)
Male	≤0.9	GFR = 144 × (sCr/0.9)^−0.411 × 0.993^age × (1.159 if black)
Male	>0.9	GFR = 144 × (sCr/0.9)^−1.209 × 0.993^age × (1.159 if black)
Female	≤0.7	GFR = 141 × (sCr/0.7)^−0.329 × 0.993^age × (1.159 if black)
Female	>0.7	GFR = 141 × (sCr/0.7)^−1.209 × 0.993^age × (1.159 if black)

Equation 2: combination of serum creatinine and serum cystatin C ([3])
Gender	Creatinine (mg/dL)
Male	≤0.9	GFR = 135 × (sCr/0.9)^−0.207 × (sCys/0.8)^a × 0.995^age × (1.08 if black)
Male	>0.9	GFR = 135 × (sCr/0.9)^−0.601 × (sCys/0.8)^a × 0.995^age × (1.08 if black)
Female	≤0.7	GFR = 130 × (sCr/0.7)^−0.248 × (sCys/0.8)^a × 0.995^age × (1.08 if black)
Female	>0.7	GFR = 130 × (sCr/0.7)^−0.601 × (sCys/0.8)^a × 0.995^age × (1.08 if black)
		a = −0.375 if sCys ≤0.8 mg/L or −0.711 if sCys >0.8 mg/L

GFR, glomerular filtration rate; sCr, serum creatinine; sCys, serum cystatin C.