Intelligent Algorithm-Based Ultrasound Images in Evaluation of Therapeutic Effects of Radiofrequency Ablation for Liver Tumor and Analysis on Risk Factors of Postoperative Infection

Table 1

Univariate analysis of infection after RFA.

Risk factors		Number of RFAs	χ ^2	P
Gender	Men	23	0.153	0.717
	Women	17
Age	<55 years old	41	2.147	0.235
	≥55 years old	35
Child-Pugh grade	Grade A	10	0.106	0.649
	Grade B	6
History of abdominal surgery	Yes	7	4.732	0.0628
	No	4
Diameter	Diameter <3 cm	14	63.415	P
	Diameter between 3 and 5 cm	21
	Diameter >5 cm	32
With or without great vessel invasion	With	8	4.378	0.034
	Without	57
TNM staging	TNM stage I	18	45.219	P
	TNM stage II	24
	TNM stage III-IV	31
Antimicrobial prophylaxis	Yes	5	0.000	1.000
	No	7