How common is lower gastrointestinal (GI) bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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Lower gastrointestinal bleeding (LGIB) accounts for approximately 20%-33% of episodes of gastrointestinal (GI) hemorrhage, with an annual incidence of about 20-27 cases per 100,000 population in Western countries. However, although LGIB is statistically less common than upper GI bleeding (UGIB), it has been suggested that LGIB is underreported because a higher percentage of affected patients do not seek medical attention. [3] Indeed, LGIB continues to be a frequent cause of hospital admission and is a factor in hospital morbidity and mortality, particularly among elderly patients. [4] LGIB is distinct from UGIB in epidemiology, management, and prognosis. [5]

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