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Table 3 Results of the meta-analysis

From: Robotic versus laparoscopic Gastrectomy for gastric cancer: a systematic review and updated meta-analysis

Outcomes No. of studies Sample size Heterogeneity (P, I 2) Overall effect size 95% CI of overall effect P
LG RG
Conversion 4 16 6 0.68, 0% RR =0.88 0.36 ~ 2.17 0.78
Operation time (min) 19 4123 1830 <0.001, 88% WMD = −49.05 -58.18 ~ −39.91 <0.01
Blood loss (mL) 18 4055 1762 <0.001, 93% WMD =24.38 12.32 ~ 36.43 <0.01
Time to first flatus (days) 9 1231 713 <0.001, 74% WMD =0.09 -0.10 ~ 0.27 0.36
Time to oral intake (days) 9 2055 1096 0.67, 0% WMD =0.23 0.13 ~ 0.34 <0.01
Hospital stay (days) 19 4123 1830 <0.001, 82% WMD =0.35 -0.25 ~ 0.95 0.25
Overall complications 19 4123 1830 0.82, 0% RR =0.96 0.82 ~ 1.13 0.65
Surgical complications 17 3234 1552 0.52, 0% RR =0.87 0.72 ~ 1.05 0.15
Medical complications 12 2137 907 0.82, 0% RR =1.34 0.75 ~ 2.40 0.32
Reoperation 7 1796 789 0.35, 11% RR =0.69 0.29 ~ 1.62 0.39
Mortality 7 2131 838 0.91, 0% RR =0.67 0.26 ~ 1.74 0.41
Retrieved lymph nodes 17 3229 1585 <0.001, 86% WMD = −1.44 -3.26 ~ 0.37 0.12
Proximal margin (cm) 9 2006 1024 0.21, 26% WMD = −0.14 -0.36 ~ 0.07 0.18
Distal margin (cm) 8 1948 973 <0.001, 81% WMD =0.09 -0.46 ~ 0.65 0.74
Recurrence 3 500 187 0.39, 0% RR =1.09 0.57 ~ 2.05 0.80
Cost (USD) 4 390 384 <0.001, 93% WMD = −3944.8 -4943.5 ~ −2946.2 <0.01