Table 1.
Participant characteristics
| PMS | iASD | p value | |
|---|---|---|---|
| Mean (SD) | Mean (SD) | ||
| Age, years | 7.9 (3.9) | 9.5 (3.9) | 0.37 |
| DQ | 21 (14) | 35 (25) | 0.13 |
| Language quotient | 17 (14) | 31 (23) | 0.13 |
| Nonverbal quotient | 24 (15) | 39 (28) | 0.15 |
| Mullen receptive language AE (months) | 14 (10) | 30 (9) | 0.001 |
| Mullen expressive language AE (months) | 11 (9) | 25 (12) | 0.005 |
| ADOS total | 18 (6) | 20 (4) | 0.43 |
| ADOS social affect | 16 (5) | 15 (SD) | 0.72 |
| ADOS repetitive behavior | 3 (2) | 5 ± 2 | 0.007 |
| ADI communication | 12 (3) | 13 ± 5 | 0.27 |
| ADI social interaction | 20 (7) | 24 ± 5 | 0.16 |
| ADI repetitive behavior | 4 (2) | 7 ± 2 | 0.02 |
| Vineland adaptive behavior composite | 52 (11) | 55 ± 10 | 0.59 |
SD standard deviation, DQ developmental quotient, Mullen Mullen Scales of Early Learning, AE age equivalents, ADOS Autism Diagnostic Observation Schedule, second edition, ADI Autism Diagnostic Interview, revised