. 2014 Jan 13;9(1):e84688. doi: 10.1371/journal.pone.0084688

Table 1. Equations to predict glomerular filtration rate.

Name	Year	Gender	Scr	Scys	Equation
C-MDRD	2006				175×Scr^−1.234×age^−0.179(×0.79,if female)
MacIsaac	2006				(86.7/Scys)-4.2
Ma	2007				169×Scr^−0.608×Scys^−0.63×age^−0.157(×0.83,if female)
CKD-EPI_2009Scr	2009	female	≤0.7		144× (Scr/0.7)^−0.329×0.993^age(×1.159,if black)
			>0.7		144× (Scr/0.7)^−1.209×0.993^age(×1.159,if black)
		male	≤0.9		141× (Scr/0.9)^−0.411×0.993^age(×1.159,if black)
			>0.9		141× (Scr/0.9)^−1.209×0.993^age(×1.159,if black)
CKD-EPI_2012cys	2012	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_2012Scr-cys	2012	female	≤0.7	≤0.8	130× (Scr/0.7)^−0.248× (Scys/0.8)^−0.375×0.995^age(×1.08,if black)
				>0.8	130× (Scr/0.7)^−0.248× (Scys/0.8)^−0.711×0.995^age(×1.08,if black)
			>0.7	≤0.8	130× (Scr/0.7)^−0.601× (Scys/0.8)^−0.375×0.995^age(×1.08,if black)
				>0.8	130× (Scr/0.7)^−0.601× (Scys/0.8)^−0.711×0.995^age(×1.08,if black)
		male	≤0.9	≤0.8	135× (Scr/0.9)^−0.207× (Scys/0.8)^−0.375×0.995^age(×1.08,if black)
				>0.8	135× (Scr/0.9)^−0.207× (Scys/0.8)^−0.711×0.995^age(×1.08,if black)
			>0.9	≤0.8	135× (Scr/0.9)^−0.601× (Scys/0.8)^−0.375×0.995^age(×1.08,if black)
				>0.8	135× (Scr/0.9)^−0.601× (Scys/0.8)^−0.711×0.995^age(×1.08,if black)

Note: Scr was shown as mg/dL; Scys was shown as mg/L; age was shown as years.

Abbreviations: Scr: serum creatinine; Scys: serum cystatin C; C-MDRD: the Chinese modified Modification of Diet in Renal Disease equation; CKD-EPI: Chronic Kidney Disease Epidemiology Collaboration; CKD-EPI_2009Scr: serum creatinine–based CKD-EPI equation which was developed in 2009; CKD-EPI_2012cys: cystatin C–based CKD-EPI equation which was newly developed in 2012; CKD-EPI_2012Scr-cys: serum creatinine– and cystatin C–based CKD-EPI equation which was newly developed in 2012.