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Descriptive statistics for the cohort
| N | 636 |
| Age/years [mean (SD)] | 65.12 (10.74) |
| Duration from diagnosis/months (median [IQR]) | 10.0 [4.0, 26.0] |
| Onset type (%) | |
| Bulbar | 173 (27.2) |
| Limb | 432 (67.9) |
| Respiratory | 12 (1.9) |
| Unknown | 19 (3.0) |
| Sex = M (%) | 390 (61.3) |
