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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 1 Epidemiological characteristics, anatomical characteristics and endoscopic retrograde cholangiopancreatography indications in the total cohort and comparison of different age groups, n (%)

Total cohort
< 80 age old (n = 2245)
≥ 80 (n = 902)
P value
Sex (male/female)1541 (49)/1606 (51)1125 (49.9)/1120 (50.1)416 (46.1)/486 (53.9)0.044
Age [mean ± SD (min-max)] (years old)68 ± 16 (17-101)
(skewness: -0.892 and kurtosis: 0.282)
62 ± 15 (17-79)85 ± 4 (80-101)
ASA score< 0.001
1540 (17.2)533 (23.7)7 (0.8)
21611 (51.2)1228 (54.7)383 (42.5)
3984 (31.3)480 (21.4)504 (55.9)
412 (0.4)4 (0.2)8 (0.9)
Antiplatelet use242 (7.7)141/2245 (6.3)101/902 (11.2)< 0.001
Anticoagulant use181 (5.8)95/2245 (4.2)86/902 (9.5)< 0.001
Indication< 0.001
Cholangitis386 (12.3)202 (9.0)184 (20.4)
Obstructive jaundice910 (28.9)658 (29.3)252 (27.9)
Biliary colic1247 (39.6)920 (41.0)327 (36.3)
Pancreatitis315 (10)226 (10.1)89 (9.9)
Bile leak139 (4.4)120 (5.3)19 (2.1)
Asymptomatic choledocholithiasis150 (4.8)119 (5.3)31 (3.4)
Previous gastrectomy76/3147 (2.4)46/2245 (2.0)30/902 (3.3)0.040
Previous hepatobiliary operation970/3147 (30.8)723/2245 (32.2)247/902 (27.4)0.008
Periampullary diverticula (among patients in whom Vater ampulla was reached)617/3085 (20)374/2205 (17.0)243/880 (27.6)< 0.001
Papilla abnormalities
(inflamed, impacted stone or adenoma)
501/3040 (16.5)368/2173 (16.9)133/867 (15.3)0.304


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