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Demographic characteristics of participants.
| Values | |
|---|---|
| Total, n | 16,609 |
| Age in years, mean (SD) | 9.08 (5.3) |
| Age categories in years, n (%) | |
| 0–2 | 2,142 (12.9) |
| 3–5 | 2,886 (17.4) |
| 6–10 | 4,802 (28.9) |
| 11–13 | 2,532 (15.2) |
| 14–18 | 4,247 (25.6) |
| Male sex, n (%) | 9,372 (56.4) |
| Race/ethnicity, n (%) | |
| Caucasian | 310 (1.9) |
| African American | 5,949 (35.8) |
| Hispanic/Latinx | 3,339 (20.1) |
| Other (includes Asian, American Indian, Hawaiian) | 101 (0.6) |
| Two or more | 275 (1.7) |
| Unknown/missing | 6,635 (39.9) |
SD = standard deviation.
