Table 1.
Breakdown of cluster characteristics
| Group | n | Gender Male/female |
Age (years) | Disease duration (months) | Site of onset (S/B/T) |
Diagnosis (ALS/ALS-FTD) |
C9orf72 (+/−) |
|---|---|---|---|---|---|---|---|
| All | 95 | 69/26 | 59.2 ± 11.6 | 21.9 ± 17.5 | 70/21/4 | 90/5 | 11/84 |
| Cluster 1 | 23 | 14/9 | 61.0 ± 12.7 | 21.3 ± 16.8 | 17/5/1 | 23/0 | 0/23 |
| Cluster 2 | 28 | 22/6 | 56.6 ± 13.0 | 25.7 ± 24.3 | 23/2/3 | 28/0 | 3/25 |
| Cluster 3 | 19 | 14/5 | 58.5 ± 11.5 | 17.8 ± 8.9 | 14/5/0 | 16/3 | 2/17 |
| Cluster 4 | 25 | 19/6 | 60.7 ± 9.0 | 22.8 ± 20.2 | 16/9/0 | 23/2 | 6/19 |
Disease duration: time interval between the estimated symptom onset and the EEG recording; site of onset: spinal/bulbar/thoracic (S/B/T); C9orf72: presence (+) or absence (−) of the repeat expansion in C9orf72; age and disease duration: mean ± SD.