Age group (years)

Cholesterol stones (CS)

Mixed stones

(MS)

Pigment stones

(PS)

Total (%)

<30

0

1

5

06 (6.4)

31 - 40

3

10

10

23 (24.5)

41 - 50

9

10

22

41 (43.6)

51 - 60

2

6

6

14 (14.9)

61 - 70

2

1

5

08 (8.5)

71 - 80

0

2

0

2 (2.1)

Total

16

30

48

94 (100)