Outcomes | No. of studies | Sample size | Heterogeneity (P, I 2) | Overall effect size | 95% CI of overall effect | P | |
---|---|---|---|---|---|---|---|
LG | RG | ||||||
Operation time (min) | |||||||
 DG | 8 | 1635 | 453 | <0.001, 78% | WMD = −57.08 | −68.62 ~ −45.54 | <0.01 |
 TG | 5 | 448 | 166 | 0.004, 74% | WMD = −42.62 | −66.72 ~ −18.52 | <0.01 |
Blood loss (mL) | |||||||
 DG | 8 | 1635 | 453 | <0.001, 77% | WMD =19.27 | 3.86 ~ 34.68 | 0.01 |
 TG | 5 | 448 | 166 | 0.54, 0% | WMD =23.77 | 1.97 ~ 45.56 | 0.03 |
Time to oral intake (days) | |||||||
 DG | 3 | 344 | 116 | 0.49, 0% | WMD =0.18 | 0.00 ~ 0.36 | 0.05 |
 TG | 3 | 251 | 100 | 0.71, 0% | WMD = −0.18 | −0.55 ~ 0.20 | 0.36 |
Hospital stay (days) | |||||||
 DG | 8 | 1635 | 453 | <0.001, 92% | WMD =0.52 | −0.69 ~ 1.74 | 0.40 |
 TG | 5 | 448 | 166 | 0.75, 0% | WMD =0.28 | −0.80 ~ 1.36 | 0.61 |
Overall complications | |||||||
 DG | 8 | 1635 | 453 | 0.86, 0% | RR =1.19 | 0.83 ~ 1.71 | 0.34 |
 TG | 4 | 330 | 140 | 0.49, 0% | RR =1.32 | 0.80 ~ 2.18 | 0.27 |
Mortality | |||||||
 DG | 4 | 942 | 213 | 0.84, 0% | RR =0.84 | 0.21 ~ 3.30 | 0.80 |
 TG | 2 | 194 | 81 | 0.55, 0% | RR =0.15 | 0.02 ~ 1.41 | 0.10 |
Retrieved lymph nodes | |||||||
 DG | 8 | 1635 | 453 | <0.001, 92% | WMD = −2.10 | −5.90 ~ 1.70 | 0.28 |
 TG | 5 | 448 | 166 | 0.63, 0% | WMD = −2.51 | −4.83 ~ −0.19 | 0.03 |