Radiofrequency ablation vs hepatic resection for solitary colorectal liver metastasis: A meta-analysis

Table 1 Baseline characteristics of studies included in the meta-analysis

Author/(yr)	Country	Group	n	M/F	Mean age (yr)	Mean tumor size (cm)	Median follow-up (mo)
Oshowo[8]	United Kingdom	RFA	25	11/14	57 (34-80)	3 (1-10)1	37 (9-67)
2003		HR	20	10/10	63 (52-77)	4 (2-7)	41 (0-97)
Aloia[16]	United State	RFA	30	23/7	-	3.0 (1.0-7.0)1	31.3 (4-138)
2006		HR	150	85/65	-	3.5 (0.5-17.0)	31.3 (4-138)
White[3]	United States	RFA	22	8/14	62 ± 7.5	2.4 ± 1.0	17
2007		HR	30	20/10	63 ± 9.6	2.7 ± 1.1	68
Berber[17]	United States	RFA	68	43/25	67 ± 1.4	3.7 ± 0.2	23 (2-86)
2008		HR	90	57/33	63.7 ± 1.3	3.8 ± 0.2	33 (2-132)
Lee[18]	Korea	RFA	37	26/11	59.0 (28-75)1	2.25 (0.8-5.0)	48.2 (0.9-133.9)
2008		HR	116	76/40	58.0 (26-79)	3.29 (0.5-18.0)	48.2 (0.9-133.9)
Hur[19]	Korea	RFA	25	15/10	62.6 (33-82)	2.5 (0.8-3.6)	42 (13-120)
2009		HR	42	27/15	58 (42-75)	2.8 (0.6-8)	42 (13-120)
Reuter[20]	United States	RFA	66	46/20	63.5	3.2	20
2009		HR	126	69/57	61.9	5.3	20

RFA: Radiofrequency ablation; HR: Hepatic resection; M: Male; F: Female.

¹Median.