D2 dissection in laparoscopic and open gastrectomy for gastric cancer

Table 1 Demographic characteristics of the two groups

Variable	LAG (n = 131)	OG (n = 78)	P value
Sex (male:female)	88:43	52:26	0.940
Age (yr)	59.5 ± 12.9	60.6 ± 10.3	0.523
Operation time (min)	259.1 ± 58.6	213.9 ± 37.6	0.000
Blood loss (mL)	111.1 ± 83.7	230.1 ± 96.8	0.000
Types of resections
PG + D2	33	17	0.856
DG + D2	64	40
TG + D2	34	21
Stages
I (Ia:Ib)	29 (9:20)	12 (6:6)	0.253
II (IIa:IIb)	28 (14:14)	13 (2:11)
III (IIIa:IIIb:IIIc)	74 (33:21:20)	53 (10:19:24)

P values were calculated by independent-sample t test or by χ² test as appropriate. LAG: Laparoscopy-assisted gastrectomy; OG: Open gastrectomy; PG + D2: Radical proximal gastrectomy with D2 dissection; DG + D2: Radical distal gastrectomy with D2 dissection; TG + D2: Radical total gastrectomy with D2 dissection.