Comparative analysis of radiofrequency ablation and resection for resectable colorectal liver metastases

Table 4 Clinicopathological data of colorectal liver metastasis n (%)

		RFA (n = 17)	Resection (n = 12)	P-value
Sex	Male	7 (41)	4 (33)	0.49
	Female	10 (59)	8 (67)
Age (yr)		61.35 ± 8.33	67.50 ± 7.44	0.07
Age (yr)	≤ 65	12 (71)	4 (33)	0.07
	> 65	5 (29)	8 (67)
Timing of metastasis	Synchronous	5 (29)	3 (25)	1.00
	Metachronous	12 (71)	9 (75)
Primary site	Colon	10 (59)	8 (67)	0.72
	Rectum	7 (41)	4 (33)
T stage	I-III	13 (76)	8 (67)	0.68
	IV	4 (24)	4 (33)
Lymphovascular	Positive	8 (47)	8 (67)	0.45
Invasion	Negative	9 (53)	4 (33)
Perineural invasion	Positive	10 (59)	7 (58)	1.00
	Negative	7 (41)	5 (42)
Lymph node metastasis	Positive	11 (65)	9 (75)	0.69
	Negative	6 (35)	3 (25)
Size of metastasis (cm)		2.02 ± 1.17	3.59 ± 0.81	0.03
Size of metastasis	≤ 3 cm	13 (76)	5 (42)	0.07
	> 3 cm	4 (24)	7 (58)
Recurrence	Yes	14 (82)	9 (75)	0.67
	No	3 (18)	3 (25)

RFA: Radiofrequency ablation.