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Table 1 The baseline characteristics quality assessment of the included studies

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

Author Year Research type Study area Number of patients Gender (male/female) Age (year) NOS score
Repeated hepatectomy Radiofrequency ablation Repeated hepatectomy Radiofrequency ablation Repeated hepatectomy Radiofrequency ablation
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