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Table 7 Results of the subgroup analysis of weight

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
Operation time (min)
 non-overweight 2 232 127 0.06, 72% WMD = −37.63 −62.82 ~ −12.43 <0.01
 overweight 2 118 44 0.008, 86% WMD = −28.58 −79.11 ~ 21.94 0.27
Blood loss (mL)
 non-overweight 2 232 127 0.11, 60% WMD =0.90 −13.44 ~ 15.25 0.90
 overweight 2 118 44 0.03, 80% WMD =39.84 −41.71 ~ 121.39 0.34
Retrieved lymph nodes
 non-overweight 2 232 127 0.34, 0% WMD = −1.88 −4.78 ~ 1.01 0.20
 overweight 2 118 44 0.03, 79% WMD =4.32 −4.10 ~ 12.74 0.31