Table 4. Determinants of vitamin D deficiency in breastfed infants.

Variable	Odds ratio (95% CI)
Age (mo)	0.15* (0.02-0.97)
Birth weight (kg)	2.81 (0.18-44.38)
Body weight (kg)	0.73 (0.28-1.88)
Duration of breast feeding (mo)	6.12 (0.86-43.31)
Presence of iron deficiency	4.74 (0.36-62.43)
Maternal 25(OH)D (ng/mL)	0.74* (0.59-0.92)

CI, confidence interval; 25(OH)D, 25-hydroxyvitamin D.

^*P<0.05.