Table 5.
Serum concentrations of 25-hydroxyvitamin D, as determined using an LC-MS/MS assay, in children according to demographic and lifestyle factors
| Variable | Mean S-25(OH)D (nmol/l) |
sd | Unadjusted | P value adjusteda |
|---|---|---|---|---|
| BMI | 0⋅026 | 0⋅009b | ||
| <iso 24⋅9, n 170 | 54⋅0 | 14⋅4 | ||
| iso 25–29⋅9, n 29 | 48⋅8 | 12⋅6 | ||
| >iso 30, n 7 | 42⋅3 | 12⋅6 | ||
| Country of birthc | 0⋅004 | 0⋅0008 | ||
| Europe, n 176 | 54⋅0 | 13⋅4 | ||
| Outside Europe, n 30 | 46⋅0 | 17⋅4 | ||
| Use of vitamin D supplements | 0⋅002 | 0⋅0015 | ||
| Yes, n 15 | 63⋅6 | 20⋅9 | ||
| No, n 191 | 52⋅0 | 13⋅4 | ||
| Vacation in a sunny location during the previous 2 months | 0⋅185 | 0⋅187 | ||
| Yes, n 20 | 57⋅1 | 20⋅0 | ||
| No, n 178 | 52⋅6 | 13⋅3 |
S-25(OH)D, serum 25-hydroxyvitamin D.
a
Adjusted for season, vacation in sunny location during the previous 2 months, vitamin D supplements and BMI.
b
Adjusted for season, vacation in a sunny location during the previous 2 months and vitamin D supplements.
c
Born outside Europe includes children and/or one or both parents.