The Presence of Mutations in the K-RAS Gene Does Not Affect Survival after Resection of Pulmonary Metastases from Colorectal Cancer

Table 3

Multivariate analysis of overall survival.

	Beta coefficient	Type II error	Level of significance	Hazard ratio
Disease-free interval	−0.022	0.007	0.002	0.979 (0.966–0.992)
Age: >65 years	0.977	0.341	0.004	2.657 (1.361–5.184)
Number of metastases	0.673	0.195	0.001	1.960 (1.337–2.874)
Lymph node involvement	1.262	0.468	0.007	3.534 (1.414–8.836)
Size	0.269	0.108	0.013	1.309 (1.059–1.617)
Previous liver metastasis	1.149	0.380	0.003	3.155 (1.497–6.649)