Morphologic factors of biliary trees are associated with gallstone-related biliary events

Table 1 Univariate analysis of potential risk factors for gallstone-related biliary events

Factor	Group A (n = 141)	Group B (n = 39)	Odds ratio	95%CI	P value
Age, yr	67.2 ± 12.9	65.2 ± 15.1	0.99	0.97-1.02	0.46
Male/female, n	77/64	17/22	1.56	0.76-3.18	0.22
Diabetes mellitus, n	41	10	1.15	0.51-0.58	0.74
Hypertension, n	54	14	1.06	0.51-2.23	0.87
BMI, kg/m2	22.7 ± 5.9	21.6 ± 7.14	1.03	0.97-1.08	0.37
Hemoglobin, mg/dL	13.1 ± 2.1	12.6 ± 1.8	1.13	0.95-1.34	0.18
Total cholesterol	174.2 ± 52.7	177.2 ± 60.5	0.99	0.99-1.00	0.77
Gallstone size, mm	9.5 ± 7.3	8.4 ± 3.4	1.35	0.76-2.40	0.31
Gallbladder/cystic duct angle	113.7°± 28.6°	98.1°± 36.2°	1.02	1.01-1.03	< 0.01
Number of gallstones	3.6 ± 1.9	2.8 ± 2.0	1.23	1.02-1.47	0.03
Cystic duct diameter, mm	5.9 ± 1.9	6.9 ± 3.4	0.86	0.74-0.98	0.03

Values are presented as mean ± SD. BMI: Body mass index.

Table 2 Multivariate analysis of potential risk factors for gallstone-related biliary events

	Odds ratio	95%CI	P value
Numbers of stones	1.32	1.08-1.62	< 0.01
Angle	1.02	1.01-1.03	0.02
Cystic duct diameter	0.83	0.71-0.97	< 0.01