Table 2.

Results of meta-analysis comparing baseline characteristics between LAP and OPEN

Baseline characteristic	Studies	LAP	OPEN	Heterogeneity	Overall	95% CI of	P
				(P, I 2)	effect size	overall effect
Gender (male/female)	6	56/57	64/58	0.37, 0%	OR = 0.85	0.50, 1.43	0.53
Age	5			0.24, 27%	WMD = −2.29	−6.24, 1.65	0.25
Tumor size	6			<0.05, 69%	WMD = −0.54	−1.23, 0.15	0.13
Tumor location
Upper /Middle	5	47/33	52/64	0.23, 29%	OR = 1.27	0.66, 2.42	0.47
Upper/ Lower	5	47/15	52/8	0.27, 23%	OR = 0.64	0.25, 1.66	0.36
Mitotic index (≤5/>5)	5	55/31	68/40	0.69, 0%	OR = 0.96	0.52, 1.75	0.89
Risk classification
Intermediate/High	5	41/27	36/37	0.57, 0%	OR = 1.58	0.81, 3.12	0.18

LAP laparoscopic resection, OPEN open resection