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. 2021 Dec 7;27(45):7801–7812. doi: 10.3748/wjg.v27.i45.7801

Table 1.

Demographic characteristics and clinical features of inflammatory bowel disease patients


Ulcerative colitis
Crohn’s disease
Number of patients 10 10
Age at onset (yr, mean) 36.1 ± 18.31 31.6 ± 14.6
Sex, (%)
Male 40 30
Female 60 70
Race, (%)
Caucasian 100 90
Non-caucasian 0 10
Alcoholism, (%) 10 20
Smoking, (%) 20 10
Family history of IBD, (%) 10 0
Site of UC, (%)
Proctitis 20 -
Left-sided 30 -
Extensive 50 -
Site of CD, (%)
Ileal - 20
Colonic - 20
Ileocolonic - 60

IBD: Inflammatory bowel disease; UC: Ulcerative colitis; CD: Crohn’s disease.