CKD-EPI creatinine-cystatin C glomerular filtration rate estimation equation seems more suitable for Chinese patients with chronic kidney disease than other equations

Table 1 Different equations for estimation of GFR

Subjects	Gender	Scr (mg/dL)	Scys (mg/L)	Equation (mL/min/1.73 m²)
CKD-EPI_scr (eGFR_scr)	female	≤0.7		141 × (Scr/0.7)^-0.329 × 0.993^age × 1.018
		>0.7		141 × (Scr/0.7)^-1.209 × 0.993^age × 1.018
	male	≤0.9		141 × (Scr/0.9)^-0.411 × 0.993^age
		>0.9		141 × (Scr/0.9)^-1.209 × 0.993^age
CKD-EPI_cys (eGFR_cys)	female		≤0.8	133 × (Scys/0.8)^-0.499 × 0.996^age × 0.932
			>0.8	133 × (Scys/0.8)^-1.328 × 0.996^age × 0.932
	male		≤0.8	133 × (Scys/0.8)^-0.499 × 0.996^age
			>0.8	133 × (Scys/0.8)^-1.328 × 0.996^age
CKD-EPI_scr__cys (eGFR_scr__cys)	female	≤0.7	≤0.8	130 × (Scr/0.7)^-0.248 × (Scys/0.8)^{- 0.375} × 0.995^age
			>0.8	130 × (Scr/0.7)^-0.248 × (Scys/0.8)^{- 0.711} × 0.995^age
		>0.7	≤0.8	130 × (Scr/0.7)^-0.601 × (Scys/0.8)^{- 0.375} × 0.995^age
			>0.8	130 × (Scr/0.7)^-0.601 × (Scys/0.8)^{- 0.711} × 0.995^age
	male	≤0.9	≤0.8	135 × (Scr/0.9)^-0.207 × (Scys/0.8)^{- 0.375} × 0.995^age
			>0.8	135 × (Scr/0.9)^-0.207 × (Scys/0.8)^{- 0.711} × 0.995^age
		>0.9	≤0.8	135 × (Scr/0.9)^-0.601 × (Scys/0.8)^{- 0.375} × 0.995^age
			>0.8	135 × (Scr/0.9)^-0.601 × (Scys/0.8)^{- 0.711} × 0.995^age
abbreviated _MDRD (eGFR_a__MDRD)				186 × (Scr)^-1.154 × (age)^-0.203 × (×0.742 if female)
Chinese _MDRD (eGFR_c__MDRD)				175 × (Scr)^-1.234 × (age)^-0.179 × (×0.79 if female)
original MDRD (eGFR__MDRD)				186 × (Scr)^-1.154 × (age)^-0.203 × (×0.742 if female) × (×1.233 if Chinese)

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