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

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.