Composition of common bile duct stones in Chinese patients during and after endoscopic sphincterotomy

Table 1 Patients’ characteristics between stone collected and un-collected groups

	Collected (n = 266)	Uncollected (n = 469)	P
Age (yr)	64 ± 14	65 ± 14	0.454
Sex (M/F)	156/110	297/172	0.210
JPD1 (%)	105 (39)2	158 (34)	0.116
Cholecystectomy (%)	65 (24)2	108 (23)	0.665
CBD size (cm)	1.7 ± 0.6	1.5 ± 0.6	< 0.001
CBD stone size (cm)	1.2 ± 0.6	0.6 ± 0.7	< 0.001

¹JPD: Juxtapapillary diverticulum; CBD: common bile duct.

²Number of cases: the number inside the parenthesis shows the percentage.

Table 2 Patients’ characteristics and initial stone compositions

	Bilirubinate	Cholesterol	P
	(n = 217)	(n = 42)
Age (yr)	66 ± 13	56 ± 17	0.001
Sex (M/F)	130/87	22/20	0.365
CBD diameter (cm)	1.7 ± 0.5	1.6 ± 0.6	0.119
Stone size (cm)	1.2 ± 0.6	1.2 ± 0.7	0.41
Stone number (S/M)	111/106	16/26	0.121
JPD			0.084
Present	93 (43)1	12 (29)
Absent	124 (57)1	30 (71)
GB status			0.323
Cholecystectomy	57 (26)1	8 (19)
Intact GB	160 (74)	34 (81)
With stone	111 (51)	20 (48)

Seven patients were excluded (three were calcium carbonate stones, four were mixed cholesterol and bilirubinate stones). CBD: Common bile duct; S/M: single/ multiple; JPD: juxtapapillary diverticulum; GB: gallbladder.

¹Number of cases: the number inside the parenthesis shows the percentage.

Table 3 Patients’ characteristics and compositions of recurrent CBD stones

	Bilirubinate	Cholesterol	P
	(n = 38)	(n = 3)
Age (yr)	66 ± 10	65 ± 6	0.836
Sex (M/F)	21/17	3/0	0.254
CBD diameter (cm)	1.9 ± 0.6	1.4 ± 0.2	0.159
Stone number (S/M)	16/22	1/2	1.000
Stone size (cm)	1.4 ± 0.8	0.8 ± 0.4	0.096
JPD			0.543
Present	13 (34)1	2 (67)
Absent	25 (66)	1 (33)
GB status			1.000
Cholecystectomy	18 (47)1	1 (33)
Intact GB	20 (53)	2 (67)
With stone	15 (39)	2 (67)

Three patients with mixed cholesterol and bilirubinate stones were excluded. CBD: Common bile duct; S/M: single/multiple; JPD: juxtapapillary diverticulum; GB: gallbladder.

¹Number of cases: the number inside the parenthesis shows the percentage.

Table 4 Change of stone compositions between initial and recur-rent stone

Recurrent	Initial
	Bilirubinate (n = 23)	Cholesterol (n = 4)
Bilirubinate (n = 24)	21	3
Cholesterol (n = 3)	2	1

Table 5 Compositions and color of stones

	Bilirubinate	Cholesterol	Mixed	Calcium
	stone	stone	bilirubinate	carbonate
	(n = 217)	(n = 42)	and cholesterol	stone (n = 3)
			stone (n = 4)
Yellow	55	15	2	2
Black	93	12	2	1
Brown	64	15	0	0
Green	5	0	0	0