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Families with Autism[Note]
| Diagnosis of Sibs | No. ofFamilies |
| Autism/autism | 44 |
| Autism/PDD | 22 |
| Autism/PDD2 | 18 |
| Autism/BPH | 7 |
| PDD/PDD | 3 |
| PDD/PDD2 | 6 |
| PDD/BPH | 4 |
| PDD2/PDD2 | 1 |
| Total | 105 |
Note.— The average age of affected subjects at assessment is 8.95 years (SD = 4.76 years). The ethnicity is predominantly (84%) white. The mean full-scale IQ values for affected subjects, unaffected sibs, and parents are 74.9 (SD = 26.6), 107.9 (SD = 16.2), and 113.5 (SD = 13.0), respectively.
