Table 1.

Demographic and clinical features of the patients included

	Patients with CD
Disease activity	Active (onset)	Inactive	Non‐CD ileitis	Controls
Number	25	10	8	15
Age (range), years	31·1 ± 14·1 (18–74)	32·4 ± 9·4 (21–46)	27·4 ± 13·7 (18–57)	37·6 ± 12·3 (27–67)
Sex (M/F)	15/10	5/5	4/4	7/8
Disease location, n
L1 Ileal	5	3	Terminal ileum	–
L3 Ileocolonic	10	7		–
L2 Colonic	10	–		–
Disease behaviour, n
B1 Inflammatory	24	7	–	–
B2 Stricturing	1	2	–	–
B3 Penetrating	0	1	–	–
P Peri‐anal disease	9	3	–	–
Harvey–Bradshaw Index	8	3
Concomitant treatment, n
5‐Aminosalicylates	–	1	–	–
Thiopurines	–	4	–	–
Anti‐TNF‐α	–	2	–	–
Double IS	–	1	–	–
None	–	2	–	–

Mean ± standard deviation (s.d.). CD = Crohn's disease; IS = immunosuppression; TNF = tumour necrosis factor; M/F = male/female.