Ethnic differences in inflammatory bowel disease: Results from the United Kingdom inception cohort epidemiology study

Table 1 Demographics of incident inflammatory bowel disease patients categorised by ethnicity

	White European (n = 205)	Indian(n = 68)	Pakistani (n = 24)	Other (n = 37)
Male sex, n (%)	109 (53.2)	42 (61.8)	16 (66.7)	25 (83.3)
Median age, yr (IQR range)
CD	35 (25-54)	32 (29-35)	29 (23-44)	19 (16-27)
UC	40 (28-59)	38 (29-50)	29 (23-37)	34 (25-45)
Median time from symptom onset to diagnosis, mo (IQR)
CD	2.9 (0.9-8.5)	3.0 (2.0-6.0)	3.5 (2.0-5.3)	3 (2.0-3.2)
UC	2.3 (1.0-6.0)	2.5 (0.98-4.0)	2.7 (2.0-6.2)	2.5 (1.7-3.4)
Smoking history, n (%)
CD
Never	15 (22.0)	3 (33.3)	2 (40)	3 (60)
Ex-smoker	35 (51.4)	3 (33.3)	1 (20)	1 (20)
Current	18 (26.4)	3 (33.3)	2 (40)	1 (20)
UC
Never	35c (38.0)	28a (75.7)	7b (77.8)	17a (85.0)
Ex-smoker	35 (38.0)	7 (19.0)	1 (11.1)	2 (10.5)
Current	22 (24.0)	2 (5.4)	1 (11.1)	1 (5.3)
Born in the United Kingdom (%)	91.2	85.2	66.6	89.9
Family history of IBD, n (%)	9 (5.7)	4 (6.6)	2 (11.1)	1 (3.3)

Significant difference in non-smoking (^aP < 0.001) between Indian and White European; Significant difference in non-smoking (^aP < 0.01) between Pakistani and White European; Significant difference in non-smoking.

(^cP < 0.001) between Other and White European. CD: Crohn’s disease; IBD: Inflammatory bowel disease; UC: Ulcerative colitis; IQR: Interquartile range.