Ages of onset and seizure types in patients with idiopathic generalised epilepsy age of onset over 20 years
| Syndrome | n | Age range (years) | Age of onset | Seizure types (%) | Age at onset (years) | ||||
|---|---|---|---|---|---|---|---|---|---|
| Abs | Myo | TC | Abs | Myo | TC | ||||
| Results are mean (SD) unless stated. | |||||||||
| Abs, absences; myo, myoclonus; TC, tonic–clonic seizures. | |||||||||
| Absence epilepsy | 7 | 20.33 to 25.0 | 22.8 (1.7) | 100 | 0 | 100 | 22.6 (2.1) | – | 22.0 (2.0) |
| Myoclonic epilepsy | 30 | 20.0 to 39.25 | 24.0 (4.5) | 13.3 | 100 | 90 | 27.0 (6.1) | 24.5 (4.5) | 24.6 (4.7) |
| Tonic–clonic seizures only | 35 | 20.0 to 34.58 | 23.9 (4.3) | 0 | 0 | 100 | – | – | 23.9 (4.3) |
| Totals | 72 | 20.0 to 39.25 | 23.8 (4.2) | 15.3 | 41.7 | 95.8 | 24.2 (4.4) | 24.5 (4.5) | 23.9 (4.2) |