. 2021 Feb 3;11(2):234. doi: 10.3390/diagnostics11020234

Table 3.

Diagnostic accuracy. GFR_NMR compared to eGFR_Crea and eGFR_EKFC against mGFR reference in the independent test set of n = 189 patient samples.

	eGFR_Crea	eGFR_EKFC	GFR_NMR
RMSE	25.30	19.61	16.51
Pearson correlation	0.79 (0.73–0.84)	0.80 (0.74–0.84)	0.84 (0.80–0.88)
P₁₀	0.27 (0.20–0.35)	0.37 (0.29–0.45)	0.35 (0.27–0.43)
P₁₅	0.40 (0.32–0.49) ^a	0.50 (0.41–0.58)	0.52 (0.44–0.60) ^a
P₃₀	0.64 (0.56–0.72) ^b	0.74 (0.66–0.81)^.	0.81 (0.74–0.87) ^b

Note: Serum creatinine-based eGFR_Crea was calculated using the CKD-EPI 2009 creatinine equation, while for pediatric patients, the updated Schwartz Bedside formula was used. Numbers in parentheses denote 97.5% confidence intervals, ^a: p-value McNemar test < 0.05, ^b: p-value McNemar test < 0.001.