|  | Age group | ||
---|---|---|---|---|
 |  | 2-5 N = 708 | 6-11 N = 836 | 12-18 N = 836 |
Characteristic | Value | Â | Â | Â |
Average age (yearsn ± SD) |  | 3.5 ± 1.1 | 8.6 ± 1.7 | 14.8 ± 1.9 |
Sex (%) | Girls | 49.6 | 48.8 | 50.5 |
Race/Ethnicity (%) | Non-Hispanic White | 60.5 | 62.1 | 65.9 |
 | Non-Hispanic Black | 15.8 | 15.7 | 14.5 |
 | Non-Hispanic Asian | 2.3 | 2.9 | 3.0 |
 | Non-Hispanic Other | 3.1 | 2.8 | 1.2 |
 | Mexican-American | 9.7 | 9.1 | 6.8 |
 | Other Hispanic | 8.6 | 7.5 | 8.6 |