XbaI polymorphisms of apolipoprotein B gene: Another risk factor of gallstone formation after radical gastrectomy

Table 2 Gallstone formation after radical gastrectomy

	X+X- group	X-X- group	P value
	(n = 13)	(n = 15)
Incidence of gallstone	54.2% (13/24)	9.3% (15/162)	< 0.001
Time period from gastrectomy to detection of the gallstones (mo)	16.4 ± 8.4	21.7 ± 7.4	0.085
Gallbladders motility
GBEF before surgery	50.9% ± 12.5%	51.3% ± 10.3%	0.863
GBEF after surgery	30.3% ± 20.1%	29.6% ± 19.1%	0.868
Follow-up period after	28.3 ± 1.1	28.6 ± 1.2	0.249
gastrectomy (mo)

n: Number of patients with gallstone; GBEF: Gallbladder emptying fraction.