Table 4.

Incidence of acute complications in Crohn’s disease

Complication	Incidence (%)	Ref.
Small bowel obstruction	35.0-59.0	[63]
Gastroduodenal obstruction	0.5-15.0	[64]
Colonic strictures	5.0-17.0	[73]
Intra-abdominal abscess	10.0-28.0	[85,156]
Free bowel perforation	1.0-6.5	[104,105]
Acute appendicitis	0.1-2.0	[113]
Bleeding	1.0-6.0	[126]
Perianal disease with left-sided colon or rectal involvement	17.0-43.0	[145]
Isolated perianal involvement	5.0	[146]