Table 6.
Various chromosomal abnormalities found in the subgroups of autism
| Subgroup/abnormality | Autism (n = 21) (%) | Autistic spectrum (n = 65) (%) | ADHD (n = 16) (%) | PDD (n = 16) (%) | Psychosis (n = 2) (%) | Autism classical (21-100) | Other autistic disorders (99-100) | Z | P |
|---|---|---|---|---|---|---|---|---|---|
| Normal karyotype | 16 (76.2) | 5 (7.7) | 7 (43.75) | 8 (50) | 2 (100) | 76.2 | 22.2 | 9.94 | < 0.001 S |
| Fragile X | 3 (14.3) | 54 (83.1) | 5 (31.25) | 6 (37.5) | 0 | 14.3 | 65.7 | 9.55 | < 0.001 S |
| Down | 1 (4.8) | 0 | 0 | 0 | 0 | 4.8 | 0 | 2.46 | < 0.01 S |
| Other chromosomal anomalies | 1 (4.8) | 6 (9.2) | 4 (25) | 2 (12.5) | 0 | 4.8 | 12.1 | 2.65 | < 0.01 S |
| Total | 21 (100) | 65 (100) | 16 (100) | 16 (100) | 2 (100) |