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Retrospective Cohort Study
©The Author(s) 2025.
World J Gastroenterol. Oct 7, 2025; 31(37): 110269
Published online Oct 7, 2025. doi: 10.3748/wjg.v31.i37.110269
Table 2 Endoscopic retrograde cholangiopancreatography metrics, technics, and findings according to age group, n (%)

Total cohort
< 80 age old
≥ 80
P value
Inability to locate or reach the ampulla107/3147 (3.4) 72/2245 (3.2)35/902 (3.9)0.384
Successful cannulation2291/3040 (96.1)2095/2173 (96.4)823/867 (95.3)0.148
Attempts to cannulate0.291
< 51296/3040 (42.6)913/2173 (42)383/867 (44.2)
≥ 51744/3040 (57.4)1260/2173 (58)484/867 (55.8)
Needle-knife use0.480
Yes1136/3040 (37.4)821/2173 (37.8)315/867(36.3)
No1904/3040 (62.6)1352/2173 (62.2)552/867 (62.7)
Catheterization of the pancreatic duct0.012
Yes1095/3040 (36.0)813/2173 (37.4)282/867 (32.5)
No1945/3040 (64.0)1360/2173 (62.6)585/867 (67.5)
Stricture in the cholangiogram0.063
Yes701/3040 (23.1)521/2173 (24.0)180/867 (20.8)
No2339/3040 (76.9)1652/2173 (76.0)687/867 (79.2)
Normal common bile duct in the cholangiogram210/2921 (7.2)171/2095 (8.2)39/826 (4.7)< 0.001


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