Table 4.
Logistic regression for presumed risk factors for vitamin D insufficiency (25(OH)D 20–29.9 ng/mL).
| B | SE | OR | 95% CI for OR | p | ||
|---|---|---|---|---|---|---|
| Lower | Upper | |||||
| Gender Male versus female |
1.050 | 0.574 | 2.859 | 0.927 | 8.814 | 0.068 |
| BMI Normal versus obese |
1.630 | 0.790 | 5.103 | 1.084 | 24.013 | 0.039∗ |
| Mother education Postsecondary versus secondary school or less |
2.785 | 0.705 | 16.194 | 4.064 | 64.530 | <0.001∗ |
| Physical activity High (≥4 hours/week) versus low (<4 hours/week) |
1.270 | 0.556 | 3.561 | 1.198 | 10.582 | 0.022∗ |
| Fortified milk intake Once or more/day versus less than once/day |
0.185 | 0.447 | 1.203 | 0.501 | 2.890 | 0.679 |
| Sun exposure Hours/week |
−0.538 | 0.207 | 0.584 | 0.389 | 0.877 | 0.009∗ |
| Serum calcium | 0.064 | 0.406 | 1.066 | 0.481 | 2.364 | 0.875 |
| Serum phosphorus | −0.500 | 0.160 | 0.606 | 0.443 | 0.829 | 0.002∗ |
| PTH | 0.050 | 0.014 | 1.051 | 1.024 | 1.080 | <0.001∗ |
∗ p < 0.05 is significant.
BMI: body mass index, OR: odds ratio.
PTH: parathyroid hormone, CI: confidence interval.