Table 4.
Serum levels of 25-hydroxyvitamin D, as determined using an LC-MS/MS assay, in children and the proportions of children with levels below 30 and 50 nmol/l
| n | Median S-25(OH)D (nmol/l) |
Mean S-25(OH)D (nmol/l) |
sd | Range | % (n) < 30 nmol/l | % (n) < 50 nmol/l | |
|---|---|---|---|---|---|---|---|
| All children | 206 | 52⋅0 | 52⋅9 | 14⋅3 | 13–112 | 4⋅9 (10) | 42⋅2 (87) |
| Girls | 92 | 51⋅4 | 50⋅8 | 14⋅1 | 23–112 | 7⋅6 (7) | 43⋅5 (40) |
| Boys | 114 | 52⋅5 | 54⋅5 | 14⋅3 | 13–98 | 2⋅6 (3) | 41⋅2 (47) |
| P value | 0⋅064 | 0⋅098a | 0⋅745a | ||||
| Season | |||||||
| May | 105 | 53⋅8 | 53⋅3 | 14⋅0 | 13–94 | 5⋅7 (6) | 35⋅2 (37) |
| March–April | 101 | 50⋅2 | 52⋅4 | 14⋅6 | 23–112 | 4⋅0 (4) | 49⋅5 (50) |
| P value | 0⋅646 | 0⋅558a | 0⋅038a | ||||
S-25(OH)D, serum 25-hydroxyvitamin D.
a
Differences in the proportions of 25(OH)D concentrations below 30 or 50 nmol/l.