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Sample demographics.
| Sample | N | Percent |
|---|---|---|
| ADHD Status | ||
| Suspected ADHD students | 178 | 3.5% |
| Non-ADHD students | 3806 | 74.0% |
| Excluded students | 1158 | 22.5% |
| Gender | ||
| Male | 2752 | 49.2% |
| Female | 2843 | 50.8% |
| Ethnicity | ||
| Hispanic | 1142 | 20.4% |
| Black | 3018 | 53.9% |
| Native American | 321 | 5.7% |
| Indian | 87 | 1.6% |
| Asian | 83 | 1.5% |
| Caucasian | 1050 | 18.8% |
| School-wide Prevention Program Status | ||
| Universal | 1440 | 25.7% |
| Selective | 1494 | 26.7% |
| Combined | 1335 | 23.9% |
| Control | 1326 | 23.7% |
