Table 3.
Logistic regression for presumed risk factors for vitamin D deficiency (25(OH)D < 20 ng/mL).
| B | SE | OR | 95% CI for OR | p | ||
|---|---|---|---|---|---|---|
| Lower | Upper | |||||
| Gender Male versus female |
2.331 | 1.024 | 10.291 | 1.382 | 76.610 | 0.023∗ |
| BMI Normal versus obese |
0.783 | 1.073 | 2.188 | 0.267 | 17.934 | 0.466 |
| Mother education Postsecondary versus secondary school or less |
3.096 | 1.137 | 22.112 | 2.380 | 205.476 | 0.006∗ |
| Physical activity High (≥4 hours/week) versus low (<4 hours/week) |
1.516 | 0.805 | 4.552 | 0.940 | 22.043 | 0.060 |
| Fortified milk intake Once or more/day versus less than once/day |
1.212 | 0.562 | 3.360 | 1.116 | 10.114 | 0.031∗ |
| Sun exposure Hours/week |
−0.131 | 0.216 | 0.877 | 0.574 | 1.339 | 0.543 |
| Serum calcium | 0.512 | 0.482 | 1.668 | 0.649 | 4.291 | 0.288 |
| Serum phosphorus | −0.460 | 0.213 | 0.631 | 0.416 | 0.959 | 0.031∗ |
| PTH | 0.058 | 0.018 | 1.060 | 1.023 | 1.099 | 0.001∗ |
∗ p < 0.05 is significant.
BMI: body mass index, OR: odds ratio.
PTH: parathyroid hormone, CI: confidence interval.