Table 1 Baseline characteristics

N

58

54

Sex, F/M

33/25

28/26

Age, years (mean± SD)

42.6±9.4

39.8±8.5

Cholecystectomy, OC/LC

16/42

13/41

Early detection of bile duct injury

36

30

Episode of cholangitis

29

27

Median time from cholecystectomy to biliary stricture, months

9.5

11.0

Type of biliary stricture

Type I

14

14

Type II

13

9

Type IIIa

10

11

Type IIIa

18

19

Type IV

3

1

Undergone ERCP or PTC before surgery

47

44