Table 4.

Cox’s proportional hazards model of all factors predicting increased survival after pulmonary metastasectomy in patients with HCC

Prognostic factors	Parameter estimate (β)	P	HR	95% confidence interval
Disease-free interval (≤ 12 vs > 12 mo)	1.97545	0.4005	7.21	0.072-721.009
HBV viral hepatitis (vs no)	-33.8718	0.9906	0	0-.
Well differentiation grade (vs poorly)	-18.73237	0.9896	0	0-.
α-feto protein > 20 ng/mL (yes vs no)	-4.49444	0.0748	0.011	.-1.569
Liver transplantation (vs no)	32.71851	0.9818	1.62E + 14	0-.
Single metastasectomy (vs multiple)	-15.0999	0.0572	0	0-1.83
Thoracoscopy (vs others)	-13.02123	0.9928	0	0-.
Age	0.55293	0.0419	1.738	1.021-2.961