Mean age (SD) | 12.78 (1.29) |
Age range | 11–16 years |
Gender n (%) | Â |
 Girls | 1397 (53.5%) |
 Boys | 1215 (46.5%) |
Ethnicity n (%) | Â |
 Caucasian | 358 (13.7%) |
 African American | 1582 (60.6%) |
 Hispanic American | 672 (25.7%) |
Socio economic status n (%) | Â |
 No lunch discount | 742 (28.4%) |
 Reduced lunch fee | 200 (7.7%) |
 Free lunch | 1670 (63.9%) |