Table 1.

Demographic characteristics of patients with preoperative diagnosis of ulcerative colitis (N = 382)

Variable	N (%)
Age at diagnosis
<18 years old ≥18 years old NA	86 (22.5) 290 (75.9) 6 (1.6)
Gender
Male Female	217 (56.8) 165 (43.2)
BMI
<25 ≥25 NA	164 (42.9) 201 (52.6) 17 (4.5)
Race
Caucasian African American Asian American Indian/ Alaska Native Native Hawaiian or other pacific Islander More than one race Unknown or NA	342 (89.5) 14 (3.7) 18 (4.7) 2 (0.5) 0 (0) 3 (0.8) 3 (0.8)
Primary sclerosing cholangitis
Yes No	16 (4.2) 366 (95.8)
Smoker
Current smoker Past smoker Non-smoker NA	11 (2.9) 104 (27.2) 264 (69.1) 3 (0.8)
Family history of IBD
Yes	111 (29.1)
Ulcerative colitis (UC)	70 (63.1)
Crohn’s disease (CD)	39 (35.1)
No	255 (66.8)
NA	16 (4.2)
Mean disease duration until surgery, years (SD)	6.9 (7.2)
Disease duration until surgery
<7 years ≥7 years NA	242 (63.4) 133 (34.8) 7 (1.8)
Diagnosis after colectomy
UC CD IC Other or NA	257 (67.3) 118 (30.9) 4 (1.0) 3 (0.8)
Indication for surgery
Medically refractory Dysplasia/Colorectal Cancer Fulminant colitis Toxic megacolon Other or NA	303 (79.3) 44 (11.5) 46 (12.0) 8 (2.1) 32 (8.4)
Prior Clostridioides difficile infection,
Yes No NA	65 (17.0) 272 (71.2) 45 (11.8)
Disease extent
E1: proctitis (proximal extent to the sigmoid colon) E2: left-sided disease (to the splenic flexure) E3: extensive disease (beyond the splenic flexure) NA	4 (1.0) 43 (11.3) 269 (70.4) 66 (17.3)
Surgical procedure
Stage of ileal pouch-anal anastomosis (IPAA)
3-stage 2-stage 1-stage NA	190 (49.7) 125 (32.7) 27 (7.1) 40 (10.5)
Anastomosis type
Staple Hand-sewn NA	215 (56.3) 82 (21.5) 85 (22.3)
Postoperative complications
Yes	186 (48.7)
Anastomosis leak Pelvic sepsis Abdominal abscess requiring drainage Fistulas or sinus tracts developed until ileostomy takedown	18 (9.7) 5 (2.7) 42 (22.6) 14 (7.5)
No	138 (36.1)
NA	57 (14.9)

BMI, body mass index; IBD, inflammatory bowel disease; IC, indeterminate colitis; SD, standard deviation; NA, not available.