TABLE 1.
Sample Description
| Participant gender, n (%) | |
| Female | 63 (18) |
| Male | 282 (82) |
| Race/ethnicity, n (%) | |
| Black | 62 (18) |
| Asian American | 7 (2) |
| White | 272 (79) |
| Multiracial/other | 4 (1) |
| Maternal education, n (%) | |
| Graduate/professional | 86 (25) |
| Bachelors/some college | 186 (54) |
| High school or less | 73 (21) |
| Most recent diagnosis, n (%) | |
| Autism | 231 (67) |
| PDD-NOS | 104 (30) |
| Nonspectrum | 10 (3) |
| ADOS module at most recent assessment, n (%) | |
| Module 1 | 139 (40) |
| Module 2 | 103 (30) |
| Module 3 | 103 (30) |
| Chronological age, y | |
| Initial assessment | |
| Mean (SD) | 3.3 (1.4) |
| Quartiles (25th/50th/75th) | 2.4/2.8/3.8 |
| Most recent assessment | |
| Mean (SD) | 7.3 (2.7) |
| Quartiles (25th/50th/75th) | 4.7/7.6/9.5 |
| VIQ | |
| Initial assessment | |
| Mean (SD) | 48 (27) |
| Quartiles (25th/50th/75th) | 25/43/67 |
| Most recent assessment | |
| Mean (SD) | 58 (35) |
| Quartiles (25th/50th/75th) | 29/53/87 |
| NVIQ | |
| Initial Assessment | |
| Mean (SD) | 73 (24) |
| Quartiles (25th/50th/75th) | 55/72/89 |
| Most Recent Assessment | |
| Mean (SD) | 73 (31) |
| Quartiles (25th/50th/75th) | 47/74/97 |