Prognostic Factors of Radiofrequency Ablation plus Systemic Chemotherapy for Unresectable Colorectal Cancer with Liver Metastasis

Table 3

Multivariate analysis of independent prognostic factors for overall survival.

Variables		Multivariate analysis
		HR (95% CI)	value
Age	<40	1.63 (0.7–3.6)	0.24
	40–60
	>60
Primary cancer	Rectum	0.54 (0.2–1.3)	0.18
	Colon
Previous adjuvant chemotherapy	No
	Yes	2.08 (0.5–7.7)	0.26
Number of liver lesions	1–3	2.91 (1.1–7.4)	0.02
	4–5
Size of the largest liver lesion	≤3 cm	4.72 (1.54–14.4)	0.01
	3–5 cm
Chemo regimen	FOLFOX4
	FOLFIRI	1.15 (0.36–3.66)	0.88
Serum	No	1.73 (0.6–4.5)	0.25
	Yes

CEA: carcinoembryonic antigen.