Inflammatory bowel disease among first generation immigrants in Israel: A nationwide epi-Israeli Inflammatory Bowel Disease Research Nucleus study

Table 1 Basic characteristics of the inflammatory bowel disease cohort by June 2020 [n (%), mean ± SD and median (interquartile range) are displayed as appropriate]¹

	Origin from high-risk countries (n = 1293)	Origin from intermediate- and low-risk countries (n = 3857)	Israel-born (n = 28394)
Prevalence-crude rate2	561.4	514.3	528.9
Sex (Female)	651 (50)	1953 (51)	14234 (50)
Age at immigration	25 ± 18	25 ± 17	N/A
IBD phenotype (Crohn’s disease)	685 (53)	1748 (45)	16091 (57)
Age at diagnosis (yr)	41 ± 18	46 ± 17	32 ± 15
Age at June 2020	43 ± 17	60 ± 17	54 ± 19
Immigration periods
< 1990	501 (39)	1358 (35)	N/A
1990-2001	229 (19)	2199 (57)
2002-2020	543 (42)	300 (8)
Socioeconomic status
Low	65 (5)	247 (7)	1348 (5)
Intermediate	550 (52.5)	2247 (58)	10680 (37)
High	646 (50)	1247 (32)	15589 (55)
Missing	32 (2.5)	116 (3)	777 (3)
Residential location
Rural	111 (9)	155 (4)	3173 (11)
Urban	1182 (91)	3701 (96)	25221 (89)

¹Proportions between groups were significantly different, P < 0.001.

²Per 100000.

IBD: Inflammatory bowel disease; N/A: Not applicable.