Similar clinical characteristics of familial and sporadic inflammatory bowel disease in South Korea

Table 2 Comparison of location/extent and behavior of disease between familial and sporadic inflammatory bowel disease using the Montreal classification n (%)

Type of IBD	Familial CD (n = 17)	Sporadic CD (n = 51)	P value	Familial UC (n = 27)	Sporadic UC (n = 81)	P value
Location/extent1
1	3 (17.6)	11 (21.6)	> 0.999	11 (40.7)	28 (34.6)	0.645
2	2 (11.8)	9 (17.6)	0.718	15 (55.5)	47 (58.0)	0.826
3	12 (70.6)	31 (60.8)	0.568	1 (3.8)	6 (7.4)	0.677
4	0 (0.0)	0 (0.0)	> 0.999
CD behavior2			0.668
1	9 (52.9)	33 (64.7)	0.391
2	3 (17.6)	8 (15.7)	> 0.999
3	5 (29.5)	10 (19.6)	0.504
Perianal fistula	4 (23.5)	12 (23.5)	> 0.999

¹CD location: 1 = L1 (ileum), 2 = L2 (colon), 3 = L3 (ileocolon), 4 = L4 (upper intestine); Extension of UC: 1 = E1 (proctitis), 2 = E2 (left-sided colitis), 3 = E3 (pancolitis);

²CD behavior: 1 = B1 (nonstricturing, nonpenetrating, inflammatory), 2 = B2 (stricturing), 3 = B3(penetrating). IBD: Inflammatory bowel disease; CD: Crohn’s disease; UC: Ulcerative colitis.