Reduction of portosystemic gradient during transjugular intrahepatic portosystemic shunt achieves good outcome and reduces complications

Table 5 Survival at 3 and 6 mo, and 1, 2 and 3 years

Time	Group	Survival		Survival rate (%)	χ2	Pvalue
		Yes	No
3 mo	A	470	9	98.12	5.368	0.425
	B	401	11	97.33
	C	184	33	84.79	13.364	0.012
	D	127	45	73.83
6 mo	A	442	37	92.27	4.557	0.436
	B	381	31	92.47
	C	162	55	74.65	12.463	0.013
	D	107	65	62.2
1 year	A	397	82	82.88	4.562	0.427
	B	335	77	81.31
	C	117	100	53.91	12.568	0.016
	D	65	107	37.79
2 year	A	293	186	61.16	5.487	0.382
	B	245	167	59.46
	C	59	158	27.18	11.467	0.017
	D	26	146	15.11
3 year	A	229	250	47.8	4.582	0.375
	B	193	219	46.84
	C	32	185	14.74	10.367	0.027
	D	16	156	9.3
Total survival rate	A	217	262	45.3	3.376	0.369
	B	178	234	43.2
	C	28	189	12.9	13.582	0.014
	D	12	160	6.97

Survival rates showed no significant differences between groups A and B (P > 0.05), but there were significant differences between groups C and D.