Table 4.

Coefficient of variation and concordance correlation coefficient between various equations (n=5274)

Equations	Coefficient of Variation, % (95% Confidence Interval)a	Concordance Correlation Coefficient (95% Confidence Interval)
eGFRCKD-EPI and eGFRMDRD	7 (7 to 7)	0.88 (0.87 to 0.88)
eGFRCKD-EPI and CG eCrCl	19 (19 to 20)	0.55 (0.53 to 0.56)
eGFRMDRD and CG eCrCl	22 (21 to 22)	0.54 (0.52 to 0.55)
CKD-EPIBSA and MDRDBSA	7 (7 to 7)	0.90 (0.90 to 0.91)
eGFRCKD-EPI and MDRDBSA	12 (11 to 12)	0.75 (0.74 to 0.76)
eGFRCKD-EPI and CKDepiBSA	11 (11 to 11)	0.78 (0.77 to 0.79)
CKD-EPIBSA and eGFRMDRD	14 (13 to 14)	0.68 (0.66 to 0.69)
eGFRMDRD and MDRDBSA	10 (10 to 10)	0.85 (0.84 to 0.85)
eGFRCKD-EPI and J-W eGFR	13 (13 to 13)	0.69 (0.67 to 0.70)
eGFRMDRD and J-W eGFR	15 (15 to 15)	0.59 (0.58 to 0.61)
CG eCrCl and J-W eGFR	11 (10 to 11)	0.80 (0.80 to 0.81)

CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; CKD-EPI_BSA, CKD-EPI × (patient’s body surface area [BSA]/1.73); MDRD, Modification of Diet in Renal Disease; MDRD_BSA, MDRD × (patient’s BSA/1.73); CG CrCl, Cockcroft-Gault creatinine clearance; CG CrCl_BSA, CG CrCl × (patient’s BSA/1.73); J-W eGFR, Janowitz-Williams eGFR.

^aRoot mean square method.