. Author manuscript; available in PMC: 2013 Dec 1.

Published in final edited form as: Kidney Int. 2013 Feb 20;83(6):1169–1176. doi: 10.1038/ki.2013.7

Table 2.

Within-subject Coefficient of Variation (CV) by each method overall, GENOA repeats a mean 62 days apart, and GENOA and ECAC cohort overlap a mean 296 days apart.

Method	CV overall (40 pairs)	CV GENOA repeats (22 pairs)^*	CV GENOA-ECAC (18 pairs)^*

	Median (10%, 90%), Mean	Median (10%, 90%), Mean	Median (10%, 90%), Mean
mGFR	5.9% (1.7%, 15.3%), 8.2%	6.1% (0.8%, 18.5%), 7.9%	5.4% (2.0%, 14.5%), 8.8%
eGFR_Cr	3.8% (0.5%, 15.5%), 6.4%	2.4% (0.5%, 12.0%), 5.3%	6.9% (0.7%, 20.9%), 7.8%
eGFR_CysC	6.4% (2.0%, 25.3%), 10.7%^†	5.8% (1.8%, 26.0%), 10.7%	8.8% (2.0%, 23.1%), 10.7%
eGFR_Cr-CysC	5.4% (1.7%, 17.8%), 8.2%	4.5% (1.7%, 15.0%), 7.1%	8.4% (1.7%, 17.8%), 9.7%
CrCl	8.5% (2.4%, 28.3%), 11.3% ^†	9.9% (3.4%, 28.3%), 11.9%	6.1% (1.4%, 29.0%), 10.6%

GENOA repeats a mean 62 days apart and GENOA-ECAC cohort overlap a mean 296 days apart.

^†

p<0.05 by Wilcoxon signed rank test compared to eGFR_Cr