Table 3.
Partial correlations between determinants of 25(OH)D concentration and plasma 25(OH)D concentrations.
| Determinant of 25(OH)D concentration | Spearman correlations | |||
|---|---|---|---|---|
| r 1 | p 1 | r 2 | p 2 | |
| Age (year) | −0.05 | 0.18 | −0.05 | 0.17 |
| Body mass index (kg/m2) | −0.14 | 0.0001 | −0.15 | <0.0001 |
| Waist-to-hip ratio | 0.02 | 0.66 | 0.02 | 0.63 |
| Vitamin D intake 3 (IU/day) | 0.13 | 0.0003 | 0.12 | 0.0002 |
| Calcium intake 3 (mg/day) | 0.15 | <0.0001 | 0.13 | 0.0005 |
| Caloric intake (kcal/day) | −0.10 | 0.005 | −0.08 | 0.04 |
| Physical activity (MET-h/week) | 0.20 | <0.0001 | 0.20 | <0.0001 |
| Alcohol (servings/week) | 0.04 | 0.34 | 0.02 | 0.56 |
| Season at blood sampling, n (%) 4 | 0.40 | <0.0001 | 0.40 | <0.0001 |
| Education, n (%) | −0.12 | 0.001 | −0.13 | 0.0004 |
| Smoking status, n (%) | 0.07 | 0.08 | 0.07 | 0.06 |
| Total of all colas (serving/week) 5 | −0.11 | 0.004 | ||
1 Adjusted for all other determinants included in this table except for total of all colas. 2 Adjusted for all other determinants included in this table. 3 Total intakes from food and supplements. 4 Coded winter = 1, fall and spring = 2 and summer = 3. 5 Including regular colas and caffeine free colas.