Table 1.
Participant characteristics (n = 65)
| Characteristic | n | % |
|---|---|---|
| Maternal age (year) | 31.5 (30.0, 35.0) § | |
| Infant age (week) | 12.0 (10.0, 16.0) § | |
| Season | ||
| October to March | 21 | 32.3 |
| April to September | 44 | 67.7 |
| Group | ||
| Asian immigrant* | 28 | 43.1 |
| White non‐immigrant | 37 | 56.9 |
| Annual family income | ||
| <$40 000 | 5 | 7.7 |
| $40 000–<80 000 | 9 | 13.8 |
| $80 000–<120 000 | 13 | 20.0 |
| ≥$120 000 | 14 | 21.5 |
| Non‐responders † | 24 | 36.9 |
| Education | ||
| <High school | 1 | 1.5 |
| Some and completed high school | 5 | 7.7 |
| Some and completed trade/vocational training/college | 9 | 13.8 |
| Some and completed university | 50 | 76.9 |
| Infant vitamin D supplement (μg d−1) | ||
| 0–<10 | 23 | 35.4 |
| ≥10 | 42 | 64.6 |
| Infant upper inner arm ITA° ‡ | 50.6 (40.4, 55.2) § | |
*Chinese (n = 16), Indian (n = 2), Pakistani (n = 1), Filipino (n = 3), Iranian (n = 6). †Do not know or do not want to say. ‡ITA° is classified as very light > 55° > light > 41° > intermediate > 28° > tanned > 10° > brown > −30° > dark. §Median (1, third quartile).