Table 1.

Correlation coefficients between probes^a

Probe A	Probe B	r2	n
Nephrin	Nephrin	0.74	35
Nephrin	Podocin	0.17	1153
Nephrin	Podocalyxin	0.26	70
Nephrin	GLEPP1	0.02	70
Nephrin	WT1	0.26	70
Nephrin	AQP2	0.12	1149
Nephrin	GAPDH	0.22	35
Podocin	Podocalyxin	0.61	70
Podocin	GLEPP1	0.51	70
Podocin	WT1	0.44	70
Podocin	AQP2	0.33	1148
Podocin	GAPDH	0.23	35

^aCorrelation coefficients (r²) between probe sets used to measure the relative amounts of mRNAs in urine over the time course of progression.