Polymorphisms in oxidative pathway related genes and susceptibility to inflammatory bowel disease

Table 1 Basic characteristics of inflammatory bowel disease patients n (%)

Patient characteristics		CD (n = 136)	UC (n = 63)
Gender	Male	96	34
	Female	40	29
Age at diagnosis	< 16	16	1
	17-40	79	34
	≥ 40	22	19
	Data not available	19	9
Location of CD	L1 ± L4	38 (28)	-
	L2 ± L4	30 (22)	-
	L3 ± L4	53 (39)	-
	L4	4 (3)	-
	Data not available	11 (8)	-
Behavior of CD	B1 ± p	35 (26)	-
	B2 ± p	47 (34)	-
	B3 ± p	39 (29)	-
	Data not available	15 (11)	-
Location of UC	E1	-	5 (8)
	E2	-	24 (38)
	E3	-	8 (12)
	E4	-	13 (21)
	Data not available	-	13 (21)
Smoking habits	Yes	35	11
	No	67	32
	Data not available	34	20

CD: Crohn’s disease; UC: Ulcerative colitis.