Relationship between age threshold and the risk of recurrent gastrointestinal bleeding Age Recurrent bleeding Total Yes: n (%) No: n (%) < 60 1 (33, 3%) 90 (61, 2%) 91 (60, 7%) ≥ 60 2 (66, 7%) 57 (38, 8%) 59 (39, 3%) Total 3 (100%) 147 (100%) 150 (100%) Comment: With the age threshold above 60 is the factor prognosis risk of recurrent gastrointestinal bleeding, with sensitivity, specificity: 66.7% and 61.2% respectively.