Table 2. Patient characteristics.

Study	Age(yr)	Female(%)	ASA(mean)	BMI(mean)	Malignant(%)
	RADP/ LDP	RADP VS. LDP	RADP VS. LDP	RADP VS. LDP	RADP VS. LDP
Waters[9]	64/59	65/50 P = 0.38	2.9/2.8 P = NS	NR	0/11.1 P = 0.29
Kang[10]	44.5/56.5	60/56 P = NS	NR	24.1/23.4 P = 0.34	P = NS
Daouadi[11]	59/59	67/65 P = 0.86	2.9/3.2 P = 0.8	27.9/29.0 P = 0.438	P = NS
Duran[12]	61/58.3	44/50 P = NS	2/1.9 P = NS	NR	56/44.4 P = 0.49
Lee[13]	58/58	73/56 P = 0.07	2.5/3 P = NS	28.7/28.2 P = 0.26	10.8/14.5 P = 0.57
Chen[14]	56.2/56.5	67/64 P = 0.763	1.9/1.94 P = 0.989	24.6/24.6 P = 0.960	23.2/22 P = 0.88
Butturini[15]	54/55	77/71 P = 0.929	1.91/1.76 P = 0.573	25.33/24.19 P = 0.263	13.6/9.5 P = 0.68

NR: Not reported; NS: Not significant.