Table 1.

Variables correlating with overall and recurrence-free survival

		Overall survival rate (%)				Recurrence-free survival rate (%)
Variables	n	1-year	2-year	3-year	P	1-year	2-year	3-year	P
Sex					0.188				0.534
Male	30	89	70	47		33	13	6
Female	19	94	70	62		28	24	24
Age					0.845				0.521
≤60 years	20	95	72	58		28	20	13
>60 years	29	96	69	55		35	14	14
Tumor status					0.198				0.002
Solitary	35	94	69	63		54	43	36
Multiple	14	90	71	53		26	11	11
Presence of EPM					0.253				0.020
Yes	13	92	71	60		12	12	12
No	36	94	80	68		50	25	12

EPM, extrapulmonary metastasis at the time of radiofrequency ablation; n, number of patients.