Effect of portal pressure gradient reduction on outcomes after transjugular intrahepatic portosystemic shunt in portal hypertension patients

Table 3 Univariate and multivariate Cox regression analyses for hepatic encephalopathy before and after propensity score matching

Characteristics	Before PSM, univariate analyses (n = 815)			Before PSM, multivariate analyses (n = 815)			After PSM, univariate analyses (n = 662)			After PSM, univariate analyses (n = 662)
	HR	95%CI	P	HR	95%CI	P	HR	95%CI	P	HR	95%CI	P
Portal vein diameter	0.309	0.193-0.494	< 0.001b	0.309	0.193-0.494	< 0.001b	0.299	0.179-0.500	< 0.001b	0.372	0.204-0.676	0.001b
Group B							1.672	1.260-2.219	< 0.001b	1.263	0.909-1.755	0.163

^bP < 0.01.

HR: hazard ratio; PSM: Propensity score matching.