Table 1. Description of the cross-sectional sample.
| Measures | ASD (n=166) | TD (n=51) | p-value |
|---|---|---|---|
| Mean±SD | Mean±SD | ||
| Age | 3.37±1.16 | 3.48±1.29 | 0.621a |
| Total Symptom Severity Score (ADOS-2 CSS) | 7.19±1.78 | 1.10±0.300 | <0.001a |
| Social Affect (ADOS-2 SA-CSS) | 6.08±2.06 | 1.18±0.478 | <0.001a |
| Repetitive Behaviors & | |||
| Restricted Interests (ADOS-2 RRB CSS) | 8.63±1.85 | 2.16±1.92 | <0.001a |
| Social Interaction (ADI-R: A) | 14.8±5.70 | 1.04±1.39 | <0.001a |
| Communication (ADI-R: B) | 9.97±3.44 | 1.12±1.35 | <0.001a |
| Repetitive Behaviors & | |||
| Restricted Interests (ADI-R: C) | 4.79±2.22 | 0.314±0.678 | <0.001a |
| Age of onset (ADI-R: D) | 3.60±0.997 | 0.078±0.337 | <0.001a |
| Best Estimate IQ | 83.6±24.0 | 119±16.5 | <0.001a |
| VABS-II Adaptive Behavior | 80.2±10.2 | 103±8.21 | <0.001 |
| VABS-II Communication | 80.2±13.7 | 105±8.94 | <0.001 |
| VABS-II Daily Living Skills | 83.7±11.6 | 101±8.25 | <0.001 |
| VABS-II Socialization | 79.2±9.82 | 101±8.49 | <0.001 |
| VABS-II Motor Skills | 88.4±11.5 | 102±11.2 | <0.001a |
Note. p-valuesa are obtained using nonparametric Mann-Whitney tests of differences between the two groups.