Association of MYO9B gene polymorphisms with inflammatory bowel disease in Chinese Han population

Table 1 Demographic and clinical characteristics of inflammatory bowel disease patients and controls, n (%)

	CD	UC	Controls
Total (n)	207	235	402
Sex (F/M)	91/116	106/129	196/206
Age at diagnosis			Mean age 40.21 ± 5.37
A1 (< 16 yr)	10 (4.8)	4 (1.7)
A2 (17-40 yr)	133 (64.3)	127 (54.0)
A3 (> 40 yr)	64 (30.9)	104 (44.3)
Disease location, CD
L1 (terminal ileum)	75 (36.2)	Proctitis 71 (30.2)
L2 (colonic location)	42 (20.3)	Left-sided 103 (43.8)
L3 (ileocolitis)	90 (43.5)	Extensive 61 (26.0)
L41 (upper gastrointestinal tract)	18 (8.7)
Disease behavior, CD
B1 (inflammatory disease)	63 (30.4)
B2 (structuring disease)	85 (41.1)
B3 (penetrating disease )	59 (28.5)
P2 (perianal disease)	47 (22.7)

¹L4 is a modifier that can be added to L1-L3 when concomitant upper gastrointestinal disease is present;

²Perianal disease was categorized as P, that could be added to B1-B3 when concomitant perianal disease is present. CD: Crohn’s disease; UC: Ulcerative colitis.