Table 1.
Clinical and demographic features of subjects with single unprovoked seizure and incident epilepsy, for subjects with at least one EEG
| Single Unprovoked Seizure | Epilepsy | |
|---|---|---|
| 141 N (%) |
478 N (%) |
|
| Age at diagnosis (years) median (IQR) | ||
| N (%) | 19.6 (6.3–38.0) | 17.3 (6.5–33.7) |
| <1 | 6 (4.3) | 29 (6.1) |
| 1–19 | 65 (46.1) | 234 (49.0) |
| >20 | 70 (49.7) | 215 (45) |
| Gender | ||
| Male | 70 (49.7) | 250 (52.3) |
| Female | 71 (50.3) | 228 (47.7) |
| Seizure type | ||
| Generalized | 0 (0) | 112 (23.4) |
| Focal | 0 (0) | 280 (58.6) |
| Both | 0 (0) | 4 (0.8) |
| Unclassifiable | 0 (0) | 82 (17.2) |
| Isolated unprovoked | 141 (100) | 0 (0) |
| History of status epilepticus | ||
| No | 134 (95.0) | 467 (97.7) |
| Yes | 7 (5.0) | 11 (2.3) |
| Etiology: | ||
| Idiopathic | 0 (0) | 86 (18) |
| Prenatal/developmental/genetic/metabolic | 6 (4.3) | 71 (14.8) |
| Postnatal symptomatic | 27 (19.1) | 107 (22.4) |
| Unknown | 108 (76.6) | 214 (44.8) |
| Number of EEGs | ||
| 1 | 78 (55.3) | 118 (24.7) |
| 2 | 40 (28.4) | 115 (24.1) |
| 3 | 7 (5.0) | 81 (17.0) |
| >4 | 16 (11.3) | 164 (34.3) |
| Number of seizures during 1st year | ||
| None | 141 (100) | 115 (24.1) |
| 1 | 0 (0) | 59 (12.3) |
| ≥ 2 | 0 (0) | 257 (53.8) |
| Unknown | 0 (0) | 47 (9.8) |
| Number of seizures during 2nd year | ||
| None | 141 (100) | 209 (43.7) |
| 1 | 0 (0) | 46 (9.6) |
| ≥ 2 | 0 (0) | 150 (31.4) |
| Unknown | 0 (0) | 73 (15.3) |
| Number of seizures during 3rd year | ||
| None | 141 (100) | 218 (45.6) |
| 1 | 0 (0) | 46 (9.6) |
| ≥ 2 | 0 (0) | 116 (24.3) |
| Unknown | 0 (0) | 98 (20.5) |
| Number of seizures during 4th year | ||
| None | 141 (100) | 239 (50.0) |
| 1 | 0 (0) | 24 (5.0) |
| ≥ 2 | 0 (0) | 100 (20.9) |
| Unknown | 0 (0) | 115 (24.1) |
| Number of seizures during 5th year | ||
| None | 141 (100) | 245 (51.3) |
| 1 | 0 (0) | 24 (5.0) |
| ≥ 2 | 0 (0) | 78 (16.3) |
| Unknown | 0 (0) | 131 (27.4) |