Table 4. Predictors of maternal vitamin D deficiency using multiple logistic regression.

Maternal variables	Odds ratio	p-value	95% confidence interval
Age	1.03	0.442	0.95–1.11
Body mass index	0.96	0.518	0.85–1.08
Vitamin D <200 IU/day	1.0	0.971	0.99–1.00
Darker skin color type (III–VI)	1.14	0.844	0.30–4.30
Sun index of 0	5.50	0.002*	1.86–16.26

Overall model: LR chi squared=12.09, p=0.0335.

*Significant.