Table 1.

 Characteristics of Crohn’s disease patients with the NOD2 wild-type genotype or NOD2 mutations, and controls. In the case of non-inflamed controls, colonoscopy was performed for polyps, anaemia, post surgical follow up, or tumour

	Crohn’s disease wild-type	Crohn’s disease NOD2 mutation	Controls
n	44	24 (SNP13: 15, SNP8: 4, SNP12: 4)	12
Age (y) (median (range))	32 (17–67)	41 (16–70)	30 (20–65)
Disease duration (y) (median (range))	7 (0–36)	10 (0–41)
Ileal involvement	58%	88%
Three most common treatments
Steroids	42%	44%
5-ASA	57%	66%
Azathioprine	28%	22%