Number of impaired tests and percentages of patients and controls demonstrating impairments
| No of tests impaired | PMA (%) | ALS (%) | HC (%) |
| 0 | 52.2 | 50 | 75 |
| 1 | 17.4 | 20 | 12.5 |
| 2 | 13.3 | 3.3 | 8.3 |
| ≥3 | 17.3 | 26.6 | 4.2 |
ALS, amyotrophic lateral sclerosis; HC, healthy controls; PMA, progressive spinal muscular atrophy.