Table 2.

Incidence rate ratios with corresponding 95% confidence intervals (95% CIs) for inflammatory bowel disease (IBD), ulcerative colitis (UC) and Crohn’s disease (CD) for demographic characteristics

	IBD	UC	CD
Sex
Female	Ref.	Ref.	Ref.
Male	0.89 (0.84–0.96)	1.02 (0.93–1.12)	0.77 (0.71–0.83)
Age group
18–29	Ref.	Ref.	Ref.
30–39	1.02 (0.92–1.13)	1.07 (0.92–1.24)	1.00 (0.88–1.13)
40–49	1.08 (0.97–1.19)	1.19 (1.03–1.38)	1.01 (0.90–1.15)
50–59	1.02 (0.92–1.14)	1.05 (0.90–1.22)	0.99 (0.87–1.12)
60+	0.72 (0.65–0.80)	0.77 (0.66–0.89)	0.69 (0.61–0.78)
Place of residence
Rural	Ref.	Ref	Ref.
Urban	1.19 (1.11–1.27)	1.08 (0.97–1.19)	1.25 (1.14–1.36)

Statistically significant values at alpha = 0.05 are bolded.