What is the mortality rate and risk factors for lower gastrointestinal (GI) bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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LGIB has a mortality rate ranging from about 10% to 20%, with risk factors for poor outcomes including creatinine levels above 150 μM, initial hematocrit level below 35%, patients of advanced age (>60 y), abnormal vital signs after 1 hour, and gross blood on initial rectal examination. [5] Patients with comorbid conditions (eg, multiorgan system disease, transfusion requirements in excess of 5 U, need for operation, and recent stress, such as surgery, trauma, and sepsis) are also at great risk for poor outcomes. LGIB is more likely in the elderly because of a higher incidence of diverticulosis and vascular disease in these groups. The incidence of LGIB is higher in men than in women.

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