Table I. Clinical Features of the Study Cohort.

Sex (M/F)	186 / 148
Median age (range)	38 (8 - 81)
Median disease duration (range)	60 months (3 - 492)
Disease extent
Pancolitis	258
Left-sided	73
Proctitis	3
Preoperative medication
Steroids alone	47
Immunomodulators	234
Extraintestinal disease	73
Arthritis	50
PSC	12
Other	11
Backwash ileitis	39
Family history of IBD	89
Perianal disease	17
Preoperative type of colitis
Ulcerative colitis	237
IBDU	97
Postoperative type of colitis
Ulcerative colitis	236
IC	98
Indication for IPAA
Medically unresponsive	281
Cancer / Dysplasia	53

PSC primary sclerosing cholangitis

IBD inflammatory bowel disease

IBDU inflammatory bowel disease unclassified

IC indeterminate colitis

IPAA ileal pouch-anal anastomosis