Table 4.

Prevalence and proportion of patients with extra-intestinal manifestations

Complications	Number of patients [%]
	Patients with perianal lesions [N = 324]	Patients without perianal lesions [N = 338]
Overall	13 [4.0]	10 [3.0]
Iritis	2 [0.6]	1 [0.3]
Uveitis	1 [0.3]	0
Ankylosing spondylitis	0	1 [0.3]
Sacroiliitis	1 [0.3]	2 [0.6]
Erythema nodosum	11 [3.4]	7 [2.1]
Pyoderma gangrenosum	2 [0.6]	1 [0.3]
Venous thrombosis	0	0
Primary sclerosing cholangitis	0	0

Statistical comparisons were not conducted because of the low prevalence of extra-intestinal manifestations.