Table 1.

Paris Classification

	N (%)
Age at diagnosis
A1a 0–<10 years	31 (24.4)
A1b 10–< 17 years	87 (68.5)
A2 17–40 years	3 (2.4)
Unknown	6 (4.7)
Location
L1 Distal Ileum	32 (25.2)
L2 Colonic	16 (12.6)
L3 Ileocolonic	53 (41.7)
L4 Isolated Upper disease	14 (11.0)
Unknown	12 (9.4)
Behavior
B1 Non stricturing / non-penetrating	95 (74.8)
B2 Stricturing	9 (7.1)
B3 Penetrating	2 (1.6)
B2B3	5 (3.9)
p Perianal Disease modifier	4 (3.1)
B1 + p	1 (0.8)
B3 + p	1 (0.8)
Unknown	10 (7.9)
Growth
G0 No evidence of growth delay	73 (57.5)
G1 Growth delay	45 (35.4)
Unknown	9 (7.1)