Establishment of a risk assessment score for deep vein thrombosis after artificial liver support system treatment

Table 2 Logistic regression analysis of influencing factors of deep venous thrombosis after artificial liver support system

Parameters	β	Wald χ2	OR	95%CI	P value
Age (yrs)	0.454	5.776	1.734	1.034-2.543	0.01
< 40	1
< 60, ≥ 40	0.034	2.765	1.114	0.324-3.654	0.95
≥ 60	3.354	8.234	1.886	1.154-4.853	0.005
Catheterization mode
Jugular vein	1
Femoral vein	0.068	0.976	0.645	0.550-1.655	0.121
ALSS times	1.63	1.424		0.257-1.667	0.223
< 3	1
≥ 3, < 5	0.354	0.564	0.454	0.416-2.534	0.531
≥ 5	0.243	0.486	1.321	1.013-6.534	0.615
Times of successful catheterization
One	1
Two	0.672	1.534	0.674	0.056-1.132	0.242
Three and more	1.246	6.435	1.667	1.005-3.235	0.005
Activity status
Free activities	1
Less than 4 h/d	0.54	1.004	1.028	0.062-1.002	0.972
Less than 1 h/d	0.764	0.172	1.565	0.999-1.504	0.128
Strict bed rest	1.547	11.074	3.049	1.744-8.414	< 0.001
D-dimer (ng/mL)
< 200	1
≥ 200, < 500	1.322	1.653	1.674	1.056-2.232	0.064
≥ 500	2.115	12.231	5.532	1.404-12.133	< 0.001
Infection
No	1
Yes	2.431	16.236	2.426	1.003-89.342	0.008

OR: Odds ratio; CI: Confidence interval; ALSS: Artificial liver support system.