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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