Table 1 Characterization of the study population
| ALS | Non-ALS diseases | |
|---|---|---|
| n | 1162 | 23 |
| Male/Female | 632/530 | 11/12 |
| Onset age (years) | 54 (46–61) | 44 (37–59) |
| Disease duration at the first visit (months) | 12 (9–21) | 24 (10–45) |
| Bulbar-onset/Limb-onset/Respiratory muscle onset | 297/858/7 | 0/23/0 |
| ALSFRS_R at the first visit | 39 (32–43) | 43 (38–45) |
| EMG/without EMG | 856/306 | 20/3 |