Quantification of excretory renal function and urinary protein excretion by determination of body cell mass using bioimpedance analysis

Table 4 Training group: Correlations, bias, precision and accuracy of the different GFR prediction methods and measured 24hU-CrCl

		Correlation coefficient R	SEE^†	BIAS Median difference^†	ABSOLUTE BIAS^†	PRECISION IQR (P25,P75) of differences^†	ACCURACY
		Correlation coefficient R	SEE^†	BIAS Median difference^†	ABSOLUTE BIAS^†	PRECISION IQR (P25,P75) of differences^†	P15 (%)	P30 (%)
All subjects (N = 60)	mCrCl	0.970***	8.7	7.4	8.5	16.4 (1.1, 17.5)	48 (80)^a	56 (93)^bcd
	4vMDRD	0.930***	13.1	−11.7	12.10	13.6 (-19.6, -5.9)	15 (25)	37 (62)
	CKD-EPI	0.950***	10.7	−10.2	10.4	10.6 (-15.5, -4.9)	21 (35)	45 (75)
	CG-CrCl	0.840***	19.3	−4.4	9.2	14.2 (-11.2, 3.0)	26 (43)	51 (85)

***p < 0.001
^†displayed in mL/min/1.73 m²;
^ap < 0.001 vs the three other methods; ^bp = 0.001 vs 4vMDRD; ^cp < 0.05 vs CKD-EPI; ^dp = 0.18 vs CG

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