Anemia in Inflammatory Bowel Disease Outpatients: Prevalence, Risk Factors, and Etiology

Table 2

Univariate and multivariate logistic regression analysis for occurrence of anemia in the whole inflammatory bowel disease group.

	OR	−95% CI	+95% CI	P
Univariate logistic regression analysis for anemia risk
Gender	0.957	0.912	1.242	0.63
Age	1.263	0.674	3.487	0.59
Inactive disease	1.438	0.497	2.764	0.75
Mild disease activity	2.614	1.345	6.243	0.09
Moderate disease activity	4.101	2.503	10.542	<0.001
Disease duration	0.989	0.646	1.728	0.21
Previous surgery	1.345	0.587	3.843	0.57
No smoking	1.912	1.088	4.531	0.04
CRP	1.905	1.047	3.354	0.001
Multivariate logistic regression analysis for anemia risk
No smoking	0.912	0.878	2.531	0.14
Moderate disease activity	3.487	1.954	9.643	0.002
CRP	1.803	1.048	3.113	0.02

OR: odds risk; CI: confidence intervals; CRP: C-reactive protein.