TABLE 1.

Crohn’s disease database (n=1015)

	All	Age group (years)
		<17	17 to 40	>40
Sex (%)
Male	44.2*	45.6	43.4	46.7
Female	55.8	54.4	56.6	53.3
Site (%)
L1	26.4	21.9	27.4	24.9
L2	30.8	21.1	28.1	49.1
L3	42.5	57.0	44.0	26.0
Behaviour (%)
B1	35.3	31.6	34.6	40.8
B2	33.7	33.3	32.6	37.9
B3	31.1	35.1	32.8	21.3

*Figures are based on Montreal classification schema (n=1015), with three patients having isolated upper gastrointestinal tract involvement (12,13). B1 Nonstenosing and nonperforating, or ‘inflammatory’; B2 Stenosing or stricturing; B3 Perforating or penetrating; L1 Ileum; L2 Colon; L3 Ileocolon