| FA patients GAA expansion | AVED patients 744 del A | p | |
| Age of onset | 15.8 ± 6.7 | 12.2 ± 3.5 | 0.047 |
| Mean age of exam | 22.2 ± 8.5 | 17.6 ± 6.6 | 0.048 |
| Babinski signs | 22% | 8% | 0.61 |
| Head titubation | 0/55 | 12/17 | 0.000 |
| D visual acuity | 9/55 | 7/17 | 0.031 |
| Gait | 54/55 | 16/17 | 0.2 |
| Dysarthria | 43/55 | 10/17 | 0.1 |
| Malformation | 80% | 76% | 0.5 |
| Amyotrophy | 70% | 30% | 0.043 |
| Severity | 24/55 | 4/17 | 0.45 |
| Lipidogram anormal | 3 /27 | 4/10 | 0.1 |
| Electromyography | |||
| ¾ Normal | 11/22 | 3/8 | 0.47 |
| ¾ Axonal | 10/22 | 4/8 | 0.47 |
| ¾ Demyelinating | 1/22 | 1/8 | 0.47 |
| CTscan cerebellum atrophy | 16/23 | 0/6 | 0.005 |