Long-Term Outcomes Following Hepatic Resection and Radiofrequency Ablation of Colorectal Liver Metastases

Table 2

Results of univariate analysis of predictors of overall survival.

		Med OS (Yr)	5-yr OS (%)	Hazard ratio	95% confidence interval	𝑃-value
Procedure	RFA	2.6	23	1.00
	Resection	3.8	43	0.54	0.32	.91	.021
Age	<70	3.5	38	1.00
	≥70	2.5	26	1.81	1.08	3.05	.025
Gender	Male	3.1	30	1.00
	Female	3.4	38	0.87	0.51	1.51	.630
Hospital	HSC	3.3	30	1.00
	SBGH	3.3	40	1.04	0.60	1.78	.900
Primary tumor	Colon	3.3	36	1.00
	Rectum	2.5	28	1.13	0.63	2.00	.660
Node positive primary	No	3.1	44	1.00
	Yes	3.3	30	0.97	0.54	1.72	.910
Timing of lesion(s)	Synchronous	3.8	50	1.00
	Metachronous	2.4	19	1.99	1.17	3.39	.012
Bilateral disease	Yes	2.4	36	1.00
	No	3.3	32	0.78	0.40	1.57	.460
No. lesions	<5	3.3	37	1.00
	≥5	2.1	0	2.93	1.30	6.60	.009
Size of lesion(s)	<5 cm	3.5	44	1.00
	≥5 cm	2.5	11	1.85	1.09	3.17	.024
Postoperative chemo	Yes	3.0	24	1.00
	No	3.3	39	0.85	0.49	1.45	.540