Optimal indicator for changing the filter during the continuous renal replacement therapy in intensive care unit patients with acute kidney injury: A crossover randomized trial

Cheng Hang, Li-jun Liu, Zhao-yun Huang, Jian-liang Zhu, Bao-chun Zhou, Xiao-zhen Li

Table 2. Rebound ratio of serum solutes

Time points	β₂-microglobulin		χ²	P	Cystatin C		χ²	P
Time points	CVVH	CVVHDF	χ²	P	CVVH	CVVHDF	χ²	P
0.5 h	1 (2.0)	0	-	0.472 ^a	1 (2.0)	2 (3.5)	0.000	1.000 ^b
12 h	11 (21.6)	12 (21.1)	0.004	0.948	12 (23.5)	11 (19.3)	0.288	0.592
24 h	19 (43.2)	16 (29.1)	2.124	0.145	23 (52.5)	29 (52.7)	0.002	0.964
36 h	11 (50.0)	27 (57.4)	0.336	0.562	14 (63.6)	28 (59.6)	0.104	0.747
48 h	5 (45.5)	19 (59.4)	0.205	0.423	8 (72.7)	24 (75.0)	0.022	0.822
60 h	3 (60.0)	9 (52.9)	-	1.000 ^a	3 (60.0)	10 (58.8)	-	1.000 ^a