Table 2.

Mean cystatin C re-runs by visit

Visit	Original	Re-Run	Difference	P
1 (n = 189)	0.82 ± 0.29 [0.51 to 3.41]	0.70 ± 0.27 [0.42 to 3.15]	0.13 ± 0.04 [0.06 to 0.30]	<0.01
2 (n = 195)	0.79 ± 0.35 [0.51 to 4.17]	0.71 ± 0.34 [0.43 to 3.89]	0.08 ± 0.04 [−0.04 to 0.28]	<0.01

Mean ± SD [min to max] or for difference mean ± SD [min to max].