Table 3.

Analysis of vascular pathway recirculation in two groups of patients (n, $\overline{x}$ ± s, %).

		CTC group (n = 68)	AVF group (n = 94)	2/t	P
Urea method	Happened	22	21	2.029	0.154
	Not happened	46	73
	R	32.35%	22.34%
Nonurea method	G1 (mg/dL)	113.76 ± 31.54	116.23 ± 21.37
	G2 (mg/dL)	142.35 ± 51.17	124.71 ± 23.66
	Ret (%)	1.414 ± 1.037	0.455 ± 0.124	8.889	<0.001