Table 4.

Predictive performance in the validation set of 109 individuals of a longitudinal estimating equation for GFR incorporating a previous direct GFR measurement

Model	eGFR	Bias (%)	95% Limits of Agreement (%)	Correlation	% within 30%	% within 10%
I	45.19 ± 14.45	4.6	−32.5, 62.0	0.81	81	38
IIa	43.60 ± 14.55	0.5	−28.6, 41.6	0.88	88	48
IIb	44.24 ± 14.16	2.4	−32.9, 56.2	0.83	80	41
IIc	45.39 ± 14.80	4.9	−32.3, 62.4	0.80	81	34
III	43.53 ± 14.45	0.4	−28.9, 41.8	0.88	86	47
IV	43.22 ± 14.42	−0.3	−29.5, 41.0	0.88	86	39

Validation set has 109 individuals with mean iGFR = 43.72 ± 15.31 ml/min per 1.73 m². eGFR, estimated GFR.