Table 4.

Multivariate logistic regression analysis of vitamin D deficiency

Independent variable	β	Odd ratio (95% CI)	P
H. pylori-Ab
H. pylori-Ab(+)	0.73	2.06 (1.77, 2.38)	< 0.001
H. pylori-Ab(−)		1*
Age (months)
6～	−2.76	0.06 (0.04, 0.08)	< 0.001
12～	−0.04	0.96.(0.075, 1.45)	0.86
24～36		1*
Anemia
Yes	0.09	1.62 (1.36, 1.96)	< 0.001
No		1*
Zinc deficiency
Yes	0.40	1.48 (1.12, 1.98)	0.01
No		1*
Iron deficiency
Yes	−0.16	0.87 (0.68, 1.06)	0.14
No		1*
Height-for-age Z score	−0.10	0.99 (0.90, 1.11)	0.83
Weight-for-age Z score	0.15	1.21 (1.02, 1.32)	0.003
Place of residence
Rural	0.61	0.15 (1.32, 2.41)	< 0.001
Urban		1*

* Indicates the reference group.