Demographic features of the 55 subjects (25 male, 30 female): entire group of ataxic subjects
| Mean (SD) | Range | |
|---|---|---|
| Age (years) | 30.5 (9.3) | 13 to 54 |
| Age of onset of neurological disability (years) | 12.5 (5.4) | 3 to 26 |
| Age at diagnosis (years) | 15.5 (6.0) | 6 to 30 |
| Duration (years) | 18.3 (10.6) | 5 to 36 |
| Age at which confined to wheelchair (years) | 18.8 (6.5) | 8 to 35 |