Table 1.

Demographic and clinical characteristics of inflammatory bowel disease patients (N 1821) included in the study

Diagnosis	CD	UC
Number (%)	1077 (59.0)	744 (40.7)
Median age (years, range)	39 (17-84)	43 (15-88)
Gender (females, %)	587 (54.5)	347 (46.6)
Race (whites, %)	1045 (97.0)	716 (96.2 )
Current smokers (N, %) Ex-smokers (N, %) Never smokers (N, %)	236 (21.9) 206 (19.1) 635 (58.0)	95 (12.8) 186 (25.0) 463 (62.2)
Median disease duration (years, range)	12 (0-63)	10 (0-70)
Montreal classification for UC
Proctitis (E1,N, %)		87 (11.7)
Left sided colitis (E2, N, %)		296 (39.8)
Extensive colitis (E3, N, %)		361 (48.5)
Montreal classification for CD
Inflammatory (B1, N,%)	229 (21.3)
Stricturing (B2, N,%)	547 (50.8)
Penetrating (B3, N,%)	301 (27.9)
Perianal (p, N,%)	252 (23.4)
Ileal (L1, N,%)	251 (23.3)
Colonic (L2, N,%)	224 (20.8)
Ileocolonic (L3, N,%)	602 (55.9)
Upper GI (L4, N,%)	76 (7.1)
Surgery for IBD (N, %)	577 (53.6)	188 (25.3)
Use of immunomodulators (N, %)	483 (44.8 )	227 (30.5 )
Use of biologics (N, %)	293 (27.2)	80 (10.8)

CD, Crohn’s disease; IBD, inflammatory bowel disease; UC, ulcerative colitis