Does the bile duct angulation affect recurrence of choledocholithiasis?

Table 1 Univariate analysis of risk factors for recurrent bile duct stones n (%)

Variable		Non recurrence group(n = 235)	Recurrence group(n = 24)	P value
Age (yr)		57.5 ± 15.2	62.4 ± 11.6	0.064
Gender (M/F)		116/119	11/13	0.742
Common bile duct diameter (mm)1		15.8 ± 6.2	20.6 ± 7.6	0.001
Sum of angle (°)1		314.9 ± 20.0	268.3 ± 29.6	0.001
T-tube drainage	No	145 (95.4)	7 (4.6)	0.002
	Yes	90 (84.1)	17 (15.9)
Periampullary diverticulum2	No	111 (93.3)	8 (6.7)	0.091
	Yes	97 (86.6)	15 (13.4)

M: Male; F: Female.

¹Values expressed as mean ± SD;

²231 patients identified by whether periampullary diverticulum was present or not were included.

Table 2 Adjusted odds ratio of risk factors for recurrent bile duct stones

	Recurrence of bile duct stones
Variables	Odds ratio	P value	95% CI1
Periampullary diverticulum	2.648	0.107	0.809-8.668
Common bile duct diameter	3.011	0.152	0.564-11.700
T-tube drainage	2.578	0.119	0.785-8.470
Sum of angle (°)	17.897	0.000	5.083-63.015
Age ≥ 65 years	0.372	0.102	0.113-1.219

¹ 95% CI: Expressed as 95% confidence interval.