“…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.…”