Table 1.
Participant demographics
| ASD (n = 98 [49♂, 49♀]) | Control (n = 98 [51♂, 47♀]) | |
|---|---|---|
| London | n = 45 (24♂, 21♀) | n = 44 (25♂, 19♀) |
| Cambridge | n = 53 (25♂, 28♀) | n = 54 (26♂, 28♀) |
| Age, years | 26 ± 7 (18–48) | 27 ± 6 (18–52) |
| Full-scale IQ, WASI | 113 ± 12 (84–136) | 116 ± 9 (93–137) |
| ADI-R sociala | 17 ± 5 (10–28) | * |
| ADI-R communicationa | 13 ± 4 (2–24) | * |
| ADI-R repetitive behaviora | 5 ± 2 (1–10) | * |
| ADOS social + communicationb | 9 ± 5 (0–21) | * |
Data expressed as mean ± standard deviation (range). There were no significant between-group differences in age or IQ, P < 0.05 (2-tailed). All participants were diagnosed using ICD-10 criteria.
aThe Autism Diagnostic Interview Revised (ADI-R) was used to confirm ASD diagnosis. ADI-R scores were unavailable for 4 participants. Each of these cases reached.
bThe Autism Diagnostic Observation Schedule (ADOS) cut-offs for “autism spectrum”, for all other participants the ADOS was not used as diagnostic criteria.
*TD controls did not undergo ADI-R or ADOS assessments.