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Table 4 Summary of analyses: MWA versus MWA + HR

From: Microwave ablation compared with hepatic resection for the treatment of hepatocellular carcinoma and liver metastases: a systematic review and meta-analysis

Outcome Number of studies included in meta-analysis Summary effect* (95% CI); P value Heterogeneity (I2 value) (%)
Primary outcome
 LTR 2 1.66 (0.32, 8.66); P = 0.103 62
Secondary outcomes
 OS (1-year) 3 1.04 (0.93, 1.17); P = 0.495 0
 OS (3-year) 3 1.24 (0.81, 1.89); P = 0.322 11
 Length of hospital stay (days) 2 − 1.98 (− 7.86, 3.90); P = 0.508 94
 DFS (1-year) 2 0.78 (0.31, 1.94); P = 0.59 66
 DFS (3-year) 2 0.59 (0.18, 1.91); P = 0.383 43
 Overall complications 3 0.39 (0.18, 0.85); P = 0.018 20
 Major complications 2 0.24 (0.09, 0.60); P = 0.002 0
  1. *Risk ratio (RR) for MWA + HR versus HR for all outcomes except hospital length of stay, which is reported as the weighted mean difference (WMD). Italicized values indicate statistical significance. Point estimates and confidence intervals were calculated using a random effects model
  2. Abbreviations: CI confidence interval, DFS disease-free survival, HR hepatic resection, LTR local tumor recurrence, MWA microwave ablation, OS overall survival, RR risk ratio