Hepatectomy vs radiofrequency ablation for colorectal liver metastasis: A propensity score analysis

Table 1 Patient characteristics n (%)

	Hepatectomy	RFA	P
	n = 102	n = 51
Sex (M/F)	73/29	35/16	0.71
Age (years) median (range)	60 (3-79)	58.5 (35-79)	0.99
Preoperative CEA (ng/mL) median (range)	4.4 (0.1-202)	6.5 (0.9-144)	0.19
Size of liver metastases, median (range)	1.7 (0.2-3.0)	1.8 (1.0-3.0)	0.26
Number of liver metastasis
Single	63 (62)	29 (57)	0.56
Multiple	39 (38)	22 (43)
Metastasis type
Synchronous	76 (75)	33 (65)	0.21
Metachronous	26 (25)	18 (35)
Location of liver metastasis
Unilobal	80 (78)	38 (75)	0.59
Bilobal	22 (22)	13 (25)
N stage
N0	30 (29)	13 (25)	0.61
N1, N2	72 (71)	38 (75)
Location of primary colorectal cancer
Colon	53 (52)	29 (57)	0.57
Rectum	49 (48)	22 (43)
Histological differentiation1
High grade	88 (86)	45 (88)	0.73
Low grade	14 (14)	6 (12)
Comorbidity
Liver cirrhosis2	5 (5)	6 (12)	0.18
Diabetes mellitus	20 (20)	13 (25)	0.40
Hypertension	29 (28)	12 (24)	0.52
Cardiovascular disease	3 (3)	1 (2)	0.72
Pulmonary disease	6 (6)	2 (4)	0.99
Neoadjuvant chemotherapy
Yes	6 (6)	5 (10)	0.30
No	70 (94)	28 (90)
Adjuvant chemotherapy
Yes	95 (93)	46 (90)	0.54
No	7 (7)	5 (10)

¹High grade: well or moderately differentiated, Low grade: poorly differentiated or mucinous carcinoma;

²The grade of liver cirrhosis was Child-Pugh Class A in all 11 patients. RFA: Radiofrequency ablation; CEA: Carcinoembryonic antigen.