Table 4.

Summary of results from all outcomes

Indicators	No. of studies	Events for RS	Events for LS	Effect size	95%CI
Operative time	6	-	-	17.86 min	-2.33, 38.05
Intraoperative blood loss	5	-	-	-26.36 mL	-32.02, -20.70
Postoperative complications	7	315/1211	1651/5079	0.69	0.55, 0.88
Postoperative mortality	5	4/1144	29/5025	0.71	0.26, 1.94
Reoperation	4	5/296	15/312	0.40	0.16, 1.03
Conversion to open surgery	6	6/339	17/342	0.45	0.07, 2.89
The length of stay	7	-	-	-1.51 d	-2.80, -0.21
Lymph nodes harvested	5	-	-	0.33	-1.03, 1.69
Circumferential resection margin positive	5	7/294	17/280	0.39	0.16, 0.95

RS: Robotic surgery; LS: Laparoscopic surgery.