Common bile duct diameter in an asymptomatic population: A magnetic resonance imaging study

Table 1 Common bile duct diameters in each age group

Groupnumber	Age (yr)	Patient number	Common bile duct diameterMean ± SD (mm)
I	≤ 20	42	3.23 ± 0.77
II	21-30	123	3.45 ± 0.67
III	31-40	137	3.80 ± 0.97
IV	41-50	234	4.01 ± 0.89
V	51-60	155	4.50 ± 1.11
VI	61-70	113	4.83 ± 1.18
VII	> 70	58	5.12 ± 1.10

Table 2 Pearson correlation coefficients between the common bile duct diameters and their relationship to different parameters

	Patient number	Mean ± SD	R value	P value
Body length (m)	221	1.60 ± 0.07	-0.067	0.325
Body weight (kg)	221	57.01 ± 9.17	0.041	0.548
Portal vein diameter (mm)	862	8.79 ± 0.91	0.034	0.318
Length of the extrahepatic bile duct (mm)	862	63.75 ± 9.07	0.045	0.185
Length of the CBD (mm)	862	47.53 ± 10.44	0.003	0.922

CBD: Common bile duct.