Epidemiology and Clinical Outcomes of Inflammatory Bowel Disease: A Hospital-Based Study in Central Taiwan

Table 2

Montreal classification of patients with inflammatory bowel disease.

	CD ()	UC ()
UC disease extent
E1: proctitis, (%)		20 (18.2)
E2: left-sided colitis, (%)		47 (42.7)
E3: extensive colitis, (%)		43 (39.1)
CD disease phenotype
L1: ileum, (%)	46 (57.5)
L2: colon, (%)	6 (7.5)
L3: ileo-colon, (%)	27 (33.8)
L4: UGI tract, (%)	1 (1.3)
CD disease behavior
B1: nonstricturing, nonpenetrating^#, (%)	15 (18.8)
B2: stricturing^#, (%)	48 (60.0)
B3: penetrating^#, (%)	17 (21.3)
P: perianal involvement, (%)	17 (21.3)

Abbreviations: CD: Crohn’s disease; UC: ulcerative colitis; UGI: upper gastrointestinal. ^#Includes cases with perianal involvement.