TABLE 1.
Sociodemographic characteristics of preschool children enrolled in the Study to Explore Early Development Phases 1–3, stratified by study group.
| ASD | DD | POP | ASD:DD | ASD:POP | DD:POP | |
|---|---|---|---|---|---|---|
| N = 2059 | N = 3139 | N = 3249 | p-Value | p-Value | p-Value | |
| N (%) | N (%) | N (%) | ||||
| Child sex | ||||||
| Female | 394 (19.1) | 1123 (35.8) | 1552 (47.8) | <0.01 | <0.01 | <0.01 |
| Male | 1665 (80.9) | 2016 (64.2) | 1697 (52.2) | |||
| Household income relative to federal poverty threshold | ||||||
| ≤100% | 185 (9.5) | 274 (10.7) | 159 (6.1) | 0.27 | <0.01 | <0.01 |
| 101%−399% | 751 (38.5) | 937 (36.5) | 743 (28.3) | |||
| ≥400% | 1015 (52.0) | 1355 (52.8) | 1719 (65.6) | |||
| Missing | 108 | 573 | 628 | |||
| Maternal education | ||||||
| High school or less | 406 (19.8) | 713 (23.0) | 483 (15.0) | <0.01 | <0.01 | <0.01 |
| Some college | 630 (30.7) | 752 (24.3) | 709 (22.0) | |||
| College graduate | 1018 (49.5) | 1633 (52.7) | 2032 (63.0) | |||
| Missing | 5 | 41 | 25 | |||
| Maternal race/ethnicity | ||||||
| Hispanic | 268 (13.1) | 438 (15.1) | 321 (10.8) | <0.01 | <0.01 | <0.01 |
| Non-Hispanic Black | 483 (23.5) | 670 (23.1) | 497 (16.7) | |||
| Non-Hispanic White | 1079 (52.6) | 1740 (60.0) | 2093 (70.4) | |||
| Other | 222 (10.8) | 52 (1.8) | 64 (2.1) | |||
| Missing | 7 | 239 | 274 | |||
Note: p-Values do not include missing categories.
Abbreviations: ASD, autism spectrum disorder; DD, other developmental delay disability; POP, population comparison.