“…The rate of HI/shock ranged between 1.2% and 68.3% of the eligible studies. The source of bleeding was UGIB in 54 of the included studies, 8–10,18–34,36,37,39–45,47–50,52–55,58–60,63–76 and LGIB in 7. 35,38,46,51,57,61,62 One study detailed a population including both UGIB and LGIB patients.…”