From: Changes of activity and isoforms of alkaline sphingomyelinase (nucleotide pyrophosphatase phosphodiesterase 7) in bile from patients undergoing endoscopic retrograde cholangiopancreatography
Group
Gallstone
Tumour
PSC
Others
Total
Number
29
13
10
7
59
Female
19
6
3
35
Male
4
24
Age range
33–85
60–79
20–82
53–83
20–85
Median age
67
66
48
Mean age
68.5
66.0
50.2
68.4
65.2