Risk factors of GI bleeding included history of epigastic pain OR = 25.6 (4.5 - 146.6) with p = 0.001, history of peptic ulcer OR = 7.4 (2.5 - 21.7) with p = 0.001 and history of using NSAIDs OR = 9.2 (1.9 - 43.2) with p = 0.014.