Table 4 Multivariate analysis of factors associated with vitamin D insufficiency (< 20 ng/mL) in the study infants
Variable | Crude Odds Ratio (95%CI) | p-value | Adjusted Odds Ratio (95%CI) | p-value |
|---|---|---|---|---|
Duration of sunlight exposure per day | ||||
> 15 min | Reference | Reference | ||
≤ 15 min | 1.83 (1.06–3.17) | < 0.01 | 1.37 (0.81–1.68) | 0.41 |
Duration of sunlight exposure per weeks | ||||
> 100 min | Reference | Reference | ||
≤ 100 min | 12.15 (2.89–84.4) | < 0.01 | 5.61 (1.87–18.38) | < 0.01 |
Maternal vitamin D insufficiency | ||||
> 20 ng/mL | Reference | Reference | ||
≤ 20 ng/mL | 19.12 (3.93–160.75) | < 0.01 | 9.00 (2.54–43.09) | < 0.01 |