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Table 3 Results of the meta-analysis

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

Outcomes No. of studies Sample size Heterogeneity Overall effect size 95% CI of overall effect P value
LG RG I2 (%) P value
Operation time (min) 18 3925 2481 94 < 0.001 WMD = −32.96 −42.08 ~ −23.84 < 0.001
Estimated blood loss (mL) 17 4196 2422 81 < 0.001 WMD = 28.66 18.59 ~ 38.73 < 0.001
Retrieved lymph nodes 19 4598 2677 83 < 0.001 WMD = −0.96 −2.12 ~ 0.20 0.100
Proximal margin (cm) 7 1252 761 28 0.220 WMD = −0.10 −0.29 ~ 0.09 0.300
Distal margin (cm) 6 1194 710 59 0.030 WMD = 0.15 −0.21 ~ 0.52 0.410
Time to first flatus (days) 13 2847 1888 65 < 0.001 WMD = 0.16 0.06 ~ 0.27 0.003
Hospital stay (days) 19 4598 2677 93 < 0.001 WMD = 0.23 −0.53 ~ 0.98 0.560
Overall complications 19 4598 2677 0 0.880 OR = 1.07 0.91 ~ 1.25 0.430
Mortality 5 1386 762 0 0.820 OR = 0.67 0.24 ~ 1.90 0.450
Overall survival 6 1498 890 0 0.860 HR = 0.95 0.76 ~ 1.18 0.640
Recurrence-free survival 3 586 586 0 0.910 HR = 0.91 0.69 ~ 1.21 0.530
Recurrence rate 5 1038 757 0 0.620 OR = 0.90 0.67 ~ 1.21 0.500