Retrospective Cohort Study
Copyright ©The Author(s) 2021.
World J Gastroenterol. May 21, 2021; 27(19): 2353-2365
Published online May 21, 2021. doi: 10.3748/wjg.v27.i19.2353
Table 3 Comparison of the baseline parameters between patients with acute severe lower gastrointestinal bleeding and matched patients without

Before matching
After matching
Bleeding group (n = 75)
Non-bleeding group (n = 1359)
SMD
Bleeding group (n = 72)
Non-bleeding group (n = 267)
SMD
Age at diagnosis, years (median, IQR)23 (18-32)23 (18-33)0.00922 (18-31.5)23 (18-30)0.061
Male, n (%)63 (84.0)1000 (73.6)0.25763 (87.5)234 (87.6)0.004
Disease location at diagnosis, n (%)0.3910.020
Ileum34 (45.3)377 (27.7)31 (43.1)111 (41.6)
Colon1 (1.3)81 (6.0)1 (1.4)4 (1.5)
Ileocolon40 (53.3)901 (66.3)40 (55.6)152 (56.9)
Disease behavior at diagnosis, n (%)0.3010.030
Non-stricturing, non-penetrating59 (78.7)1012 (74.5)58 (80.6)219 (82.0)
Stricturing 11 (14.7)155 (11.4)9 (12.5)32 (12.0)
Penetrating5 (6.7)192 (14.1)5 (6.9)16 (6.0)