Epidemiology of inflammatory bowel disease in racial and ethnic migrant groups

Table 1 Incidence of Crohn’s disease and ulcerative colitis

Study characteristics and demographics						Study quality characteristics
Study	Country (region)	Study period	Number of cases	Incidence rate/100000		Diagnosis based on recognised criteria	Ethnicity reporting method	Sample frame
SA	Caucasian
Crohn's disease
Fellows (1985)[11]	United Kingdom (Derby)	1966-1985	221	4.4	7.5	No	Self-reported	Hospital
Probert (1992)[6]	United Kingdom (East London)	1970-79	45	1.2	3.8	Yes	Medical records	Hospital
		1980-89	54	2.3	3.8
Jayanthi (1992)[17]	United Kingdom (Leicester)	1972-1980	80	1.2	3.5	Yes	Surname	Population
		1981-1989	104	3.1	5.3
Pinsk (2007)[12]	Canada (Vancouver)	1985-2005	397 (Paed)	6.7	1.0	Yes	Medical records	Hospital
Benchimol1 (2015)[13]	Canada (Ontario)	1994-2010	12113	5.0	11.3	No	Medical records	Population
Ulcerative colitis
Probert (1992)[5]	United Kingdom (Leicester)	1972-1989	1003	10.8	5.3	No	Surname	Population
Jayanthi (1992)[14]	United Kingdom (East London)	1972-1989	112	1.8	6.2	No	Medical records	Hospital
Carr (1999)[15]	United Kingdom (Leicester)	1991-1994	74	17.2	9.1	Yes	Self-reported	Population
Pinsk (2007)[12]	Canada (Vancouver)	1985-2005	120 (Paed)	6.4	3.7	No	Medical records	Hospital
Probert (1985)[16]	Fiji	1985-1986	15	1.5	0.2	No	Medical records	Hospital
Benchimol1(2015)[13]	Canada (Ontario)	1994-2010	12713	2.0	11.4	No	Medical records	Population

¹SA compared to non-immigrant. Characteristics of studies comparing South Asian (SA) migrants and Caucasians.