Table 2. Multivariate logistic regression analyses of CD and UC patients with increase of healthcare costs as dependent variable.

	CD		UC
Variable	Adj. OR (95% CI)	p-value	Adj. OR (95% CI)	p-value
Age (at 3 months follow up)
< 40 years	1.03 (0.54–1.98)	0.93	4.72 (1.61–13.86)	<0.01
>40 years (ref)	1		1
Disease duration (at 3 months follow up)
< 3 years	0.54 (0.17–1.68)	0.29	2.03 (0.55–7.54)	0.29
>3 years (ref)	1		1
Abdominal surgery in the past
Yes	0.68 (0.35–1.35)	0.27	3.36 (0.13–1.070)	0.07
No (ref)	1		1
Anti-TNF therapy (at 3 months follow up)
Yes	0.09 (0.02–0.12)	<0.01	0.14 (0.02–1.40)	0.10
No (ref)	1		1
Disease activity (at 3 months follow up)
Yes	0.47 (0.24–0.93)	0.03	-
No (ref)	1
Penetrating disease course
Yes	1.95 (1.02–3.73)	0.04
No (ref)	1