Geographic Mapping of Crohn’s Disease and Its Relation to Affluence in Jiangsu Province, an Eastern Coastal Province of China

Table 1

Classification of adult Crohn’s disease from Jiangsu province.

Variables	𝑛=627	Percentage (%)
Age at diagnosis
A2 (17–40 y)	412	65.7
A3 (above 40 y)	215	34.3
Disease locations at diagnosis
L1 (terminal ileal)	168	26.8
L2 (colonic)	213	34.0
L3 (ileocolonic)	246	39.2
L4 (Isolated upper disease)	22	3.5
Disease behavior at diagnosis
B1 (inflammation)	373	59.5
B2 (stricturing)	204	32.5
B3 (penetrating)	50	8.0
P (perianal disease)	74	11.8