Table 2.

Bland–Altman results summarized for agreement of various eGFR formulas with the measured isotope GFR

Formula	Schwartz eGFR	Cystatin C eGFR	BTP eGFR
Bias	10.8	9.6	1.4
SD %	21.2	21.6	28.3
95% Limit of agreement	−0.80 to 52.4	−52.0 to 32.7	−54.0 to 56.8