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

Table 2 Disease-free survival after surgical treatment with curative intent for colorectal liver metastasis by multivariate analysis by Cox regression proportional hazard model (n = 153)

Factors	Univariate analysis of DFS	Multivariate analysis of DFS
	P	HR	95%CI	P1
Radiofrequency ablation	0.033	1.57	1.02-2.41	0.040
Female sex	0.890
Age	0.270
CEA (ng/mL)	0.130	1.03	0.99-1.01	0.480
Size (cm)	0.210
Multiple	0.140	1.01	0.65-1.57	0.970
Metachronous	0.089	0.75	0.45-1.24	0.260
Bilobal	0.300
T22	0.130	0.55	0.18-1.65	0.290
T32	0.090	0.78	0.41-1.49	0.450
Lymph node metastasis	0.003	1.94	1.14-3.31	0.015
Adjuvant chemotherapy	0.810
Poorly differentiated grade	0.033	1.79	1.01-3.18	0.049

¹Cox regression proportional hazard model;

²Compared with T4 (T stage of primary colorectal tumor). CEA: Carcinoembryonic antigen; DFS: Disease-free survival; CRLM: Colorectal liver metastasis.