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| PI Cohort (n = 1762) | Control Cohort (n = 1698) | |
|---|---|---|
| Mean Age (yrs) | 8 ± 4 | 7 ± 5 |
| Sex | ||
| Male | 1001 (56.8%) | 891 (52.5%) |
| Female | 761 (43.2%) | 807 (47.5%) |
| Ethnicity: | ||
| Caucasian | 793 (45%) | 552 (33%) |
| Hispanic | 606 (35%) | 601 (35%) |
| Black | 199 (11%) | 281 (17%) |
| Asian | 89 (5%) | 91 (5%) |
| Unknown | 75 (4%) | 173 (10%) |
