Table 1.
Demographics.
| Autism, N = 97 |
TD, N = 92 |
Group Comparison |
||||
|---|---|---|---|---|---|---|
| Mean (SD) | Range | Mean (SD) | Range | t | p | |
| Mean Age (years) | 19.42 (9.23) | 3–42.17 | 20.80 (8.57) | 3.42–41.83 | −1.61 | 0.11 |
| Interscan interval (years) | 3.22 (0.47) | 2.08–5.33 | 3.11 (0.62) | 2–5.33 | 1.75 | 0.08 |
| Mean Performance IQa | 102.58 (17.01) | 59.5–138 | 113.68 (13.53) | 77–140.50 | −4.22 | < 0.001 |
| Mean Verbal IQb | 97.96 (19.62) | 56–138 | 113.16 (13.68) | 74–146.33 | −5.32 | < 0.001 |
| Mean Full-scale IQc | 100.58 (17.01) | 65–136.5 | 115.64 (13.52) | 78–142.50 | −5.85 | < 0.001 |
| ADOS CSS at entryd | 8.30 (1.54) | 3–10 | – | – | – | – |
| ADI-Re | 27.59 (7.43) | 11–40 | – | – | – | – |
TD = Typically developing.
a
Mean Performance IQ: Autism N = 87, typically developing controls N = 51.
b
Mean Verbal IQ: Autism N = 86, typically developing controls N = 51.
c
Mean Full-scale IQ: Autism N = 89, typically developing controls N = 54.
d
ADOS CSS at entry: Autism N = 93. ADOS CSS scores at time 5 have been introduced when a participant did not have an ADOS CSS at entry score.
e
ADI-R: Autism N = 73.