Table 4.

Univariate and Multivariate Analysis of Risk Factors for Zinc Deficiency in Patients with Inflammatory Bowel Disease

Variable	No. of zinc deficiency (%)	Univariate analysis	Multivariate analysis
		p-value	Relative risk (95% CI)	p-value
Age, yr		0.004		0.028
≥40	6 (19.4)		1
<40	26 (51.0)		3.683 (1.152–11.777)
Type of IBD		0.008		0.143
Ulcerative colitis	13 (27.1)		1
Crohn’s disease	19 (55.9)		2.209 (0.765–6.378)
Current use of corticosteroids		0.061		0.152
No	14 (53.8)		1
Yes	18 (32.1)		2.213 (0.745–6.568)
Serum CRP, mg/dL		0.087		0.262
≤0.5	13 (30.2)		1
>0.5	19 (48.7)		1.837 (0.635–5.313)

CI, confidence interval; IBD, inflammatory bowel disease; CRP, C-reactive protein.