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. Author manuscript; available in PMC: 2015 Aug 28.
Published in final edited form as: Transplantation. 2015 Jul;99(7):1431–1435. doi: 10.1097/TP.0000000000000552

Table 3.

Performance of CKD-EPIcr-cys equation across ranges of glomerular filtration rate

Variable Estimated GFR ml/min/1.73m2
≤30 30–60 ≥60
Accuracy - P30% (95% CI) 27.78
(19.33, 36.23)		 15.99
(11.80, 20.18)		 7.61
(3.78, 11.44)
Precision –IQR of (mGFR-eGFR)
(95% CI)		 7.84
(5.78, 9.59)		 11.17
(9.80, 12.77)		 17.46
(14.65, 20.59)
% Bias (ln) (95% CI)* −16.18
(−20.21, −12.15)		 −11.68
(−14.10, −9.61)		 −8.85
(−11.77, −5.93)
*

% Bias (ln) was calculated by the formula 100 × [ln(eGFR) – ln(mGFR)]

Accuracy was calculated as the percentage of estimates that differed from the measured GFR by more than 30%