Pre-illness changes in dietary habits and diet as a risk factor for inflammatory bowel disease: A case-control study

Table 1 Demographic and clinical features of inflammatory bowel disease cases and healthy controls

	Cases	Controls
	(n = 83)	(n = 160)
Sex (M/F)	49/34	97/63
Age (mean ± SD)	37.5 ± 15.2	40.4 ± 14.6
Social status, n (%)
Unmarried	50 (60.3)	83 (51.9)
Married	26 (31.3)	69 (43.1)
Divorced/widowed	7 (8.4)	8 (5.0)
Years of education (mean-SD)	12.4-3.5	11.5-4.2
Body mass index, kg2/cm (mean-SD)	26.1-9.3	29.1-10.8
Smoking habit, n (%)
Never	32 (38.6)	80 (50.0)
Smokers	29 (34.9)	41 (35.6)
Ex-smokers	22 (26.5)	39 (24.4)
No. cigarettes/d (smokers) mean (range)	13.4 (3-50)	14.7 (5-30)
Disease location (Crohn’s disease) n = 42
Ileum, n (%)	18 (42.9)
Ileum and colon	13 (31.0)	/
Colon	11 (26.2)
Disease location (ulcerative colitis) n = 41
Proctitis	5 (12.2)
Left sided colitis	22 (53.7)	/
Pancolitis	14 (34.1)
Disease behaviour (Crohn’s disease)
Inflammatory (B1)	27 (64.3)
Stricturing (B2)	8 (19.0)	/
Penetrating (B3)	7 (16.7)