Table 1.
Characteristics of children and corresponding 25(OH) D levels
| % (SE) (n=1,670) | Mean 25(OH) D nmol/L, (SE) | |
|---|---|---|
| Six-month period, % | ||
| Nov 1st - April 30th | 47.5 (6.5) | 60.6 (1.5)* |
| May 1st - Oct 31st | 52.5 (6.5) | 70.4 (1.7) |
| Age group, (years), % | ||
| 5-10 | 50.0 (2.2) | 69.7 (1.6)* |
| 11-15 | 50.0 (2.2) | 61.9 (1.4) |
| Gender, % | ||
| Boys | 51.4 (1.6) | 66.4 (1.1) |
| Girls | 48.6 (1.6) | 65.2 (1.9) |
| Race/Hispanic origin, % | ||
| Hispanic | 24.4 (4.4) | 60.7 (1.3)* |
| Non-Hispanic White | 52.2 (5.9) | 72.3 (1.3) |
| Non-Hispanic Black | 13.9 (2.2) | 52.1 (1.7) |
| Other Race | 9.5 (1.3) | 62.8 (1.8) |
| BMI, % | ||
| Normal | 63.5 (1.7) | 68.6 (1.6) |
| Overweight | 17.7 (0.7) | 63.2 (1.9) |
| Obese | 18.8 (1.5) | 58.8 (1.4) |
| Reference person’s education, % | ||
| <9th grade | 6.4 (1.2) | 58.2 (1.1)* |
| 9-11th grade | 11.8 (1.4) | 61.1 (1.7) |
| High school graduate | 22.4 (2.6) | 62.1 (1.7) |
| Some college | 31.8 (1.7) | 65.7 (1.4) |
| College graduate or above | 27.5 (3.4) | 72.4 (2.5) |
| Income to poverty ratio, % | ||
| <1.00 | 27.4 (3.2) | 61.0 (1.4)* |
| ≥1.00 | 72.6 (3.2) | 67.3 (1.5) |
| Hours watch TV or videos past 30 days, % | ||
| <1 h | 12.4 (1.1) | 67.9 (2.6)* |
| 1 h | 26.8 (1.7) | 68.5 (1.7) |
| 2 h | 30.0 (1.5) | 65.5 (1.1) |
| ≥3 h | 30.8 (1.6) | 62.6 (1.9) |
| Participate in school sports, % | ||
| Yes | 38.4 (2.2) | 68.6 (2.0)* |
| No | 61.6 (2.2) | 64.0 (1.2) |
| EAR for vitamin D intake, % | ||
| <400 IU | 76.7 (1.5) | 64.2 (1.3)* |
| ≥400 IU | 23.3 (1.5) | 70.9 (1.8) |
*P<0.05. EAR: Estimated Average Requirement