|  | MZ/ DZ twin pairs (at least one ASD sibling) | TD twins | ||
---|---|---|---|---|---|
 |  | Twin 1: ASD | Twin 2: ASD or TD | Twin 1 | Twin 2 |
Diagnosis Sex | N | 36 | 36 | 15 | 15 |
ASD (%) | 100 | 66.7 | 71.5 | 65.8 | |
Males:female (%) | 61.5:38.4 | 70.2:29.9 | 56.3:43.7 | 53.3:46.7 | |
Age (in years) | M | 15.9 | 15.9 | 16.8 | 16.9 |
SD | 4.5 | 4.5 | 2.9 | 2.9 | |
Range | 6–27 | 6–27 | 12–21 | 12–21 | |
Full-scale IQ | M | 94.1 | 94.2 | 103.6 | 103.7 |
SD | 19.5 | 19.0 | 13.7 | 12.6 | |
Range | 40–122 | 58–130 | 76–124 | 79–126 |