Table 1a.

Precision: Intra-assay CV

Intact FGF-23 (pg/mL)	N	Mean ± SD	%CV
	20	18.9 ± 3.4	18.1
	20	27.2 ± 3.6	13.3
	20	374 ± 22.5	6.0
C-Terminal FGF-23 (RU/mL)
	20	69.4 ± 2.8	4.0
	20	359.9 ± 25.7	7.1
	20	594.8 ± 36.8	6.2

Samples with low, medium, and high levels of intact and C-terminal FGF-23 were run 20 times. Data are provided as mean ± SD and % CV.