Table 1.
Summary of Participant Demographic Characteristics
| Characteristic | General Population Sample | Subgroup with Communication Evaluation | Subgroup with ASD |
|---|---|---|---|
| Children Screened | 5,385 | 813 | 60 |
| Infant-Toddler Checklists Completed | 8,563 | 1,274 | 78 |
| Age at First Infant-Toddler Checklist | 13.5 (4.7) | 14.2 (4.8) | 16.4 (5.4) |
| Positive Screen on ITC | 18.0% | 37.8% | 93.3% |
| Parents with Concern on ITC | 12.2% | 28.1% | 46.8% |
| Percentage of Males | 51.1% | 58.3% | 88.3% |
| Percentage of First Born | 49.4% | 46.2% | 39.3% |
| Race and Ethnicity | |||
| Caucasian | 59.3% | 71.1% | 67.2% |
| African American | 30.2% | 17.6% | 18.0% |
| Hispanic | 3.1% | 5.4% | 8.2% |
| Asian | 2.3% | 3.3% | 3.3% |
| Other | 5.1% | 2.6% | 3.3% |
| Parent’s Education in Years Completed | |||
| Mother (M, SD) | 14.3 (2.4) | 15.7 (2.4) | 15.4 (2.2) |
| Father (M, SD) | 14.3 (2.7) | 15.3 (2.8) | 15.6 (2.6) |
| Parent’s Age at Child’s Birth in Years | |||
| Mother (M, SD) | 28.2 (6.2) | 30.8 (6.0) | 31.7 (5.1) |
| Father (M, SD) | 30.9 (7.0) | 33.5 (6.8) | 34.1 (6.5) |