Comparison of the efficacy and safety of repeated hepatectomy and radiofrequency ablation in the treatment of primary recurrent liver cancer: a meta-analysis

Table 1 The baseline characteristics quality assessment of the included studies

Author	Year	Research type	Study area	Number of patients		Gender (male/female)		Age (year)		NOS score
Author	Year	Research type	Study area	Repeated hepatectomy	Radiofrequency ablation	Repeated hepatectomy	Radiofrequency ablation	Repeated hepatectomy	Radiofrequency ablation	NOS score
Umeda et al. [13]	2010	Cohort	Japan	29	58	/	/	/	/	8
Ho et al. [14]	2012	Cohort	China	54	50	40/14	39/11	56.3 ± 12.3	61.0 ± 11.1	7
Chan et al. [15]	2012	Cohort	China	29	45	/	/	52.0 (38.0–79.0)	59.0 (36.0–80.0)	7
Eisele et al. [16]	2013	Cohort	Germany	27	27	15/12	20/7	60.0 ± 17.0	68.0 ± 7.0	7
Huang et al. [17]	2015	Cohort	China	15	11	9/6	8/3	/	/	8
Song et al. [18]	2015	Cohort	Korea	39	78	31/8	58/20	52.5 ± 9.8	53.6 ± 10.9	7
Wang et al. [19]	2015	Cohort	China	128	162	113/15	148/14	49.2 ± 10.1	51.9 ± 10.9	7
Sun et al. [20]	2017	Cohort	China	43	57	34/9	38/19	60.0 (35.0–76.0)	63.0 (27.0–81.0)	8
Xia et al. [21]	2019	Cohort	China	120	120	107/13	109/11	50.0 (24.0–58.0)	52.0 (25.0–59.0)	7
Lu et al. [22]	2020	Cohort	China	120	120	108/12	104/16	50.3 ± 10.5	50.9 ± 11.6	7

ISSN: 1477-7819