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 5 Comparison of the hospitalization rate between patients with acute severe lower gastrointestinal bleeding and matched patients without
Hospitalization rate (per 100 patient-years)
Bleeding group (n = 72)
Non-bleeding group (n = 267)
Hospitalization rate ratio (95%CI)
P value
Before bleeding/index date (95%CI)21.0 (14.5-30.5)23.6 (19.0-29.2)0.89 (0.58-1.37)0.599
After bleeding/index date (95%CI)
Excluded: Index hospitalization22.1 (16.5-29.4)13.2 (11.2-15.5)1.67 (1.20-2.33)0.012
Excluded: Hospitalizations due to bleeding14.5 (10.3-20.4)13.2 (11.2-15.5)1.10 (0.75-1.60)0.631