Table 1. Demographic and clinical characteristics of the entire patient sample (n = 40).
| Category | Subcategory | Value |
| Age, years, median (range) | 36 (16–54) | |
| Gender, n. (%) | Men | 21 (52.5) |
| Women | 19 (47.5) | |
| Duration of epilepsy, years, median (range)a | 16 (2–51) | |
| MRI-defined lesions, n. (%)b | Mesial temporal atrophy/sclerosis | 15 (37.5) |
| Local/regional cortical atrophy | 10 (25) | |
| Focal cortical dysplasia | 10 (25) | |
| Periventricular nodular heterotopia | 4 (10) | |
| Polymicrogyria | 3 (7.5) | |
| Tuberous sclerosis | 1 (2.5) | |
| Implanted depth electrodes, median (range) | 6 (2–11) |
a
data missing for one patient; b 3 patients had concomitant mesial temporal atrophy/sclerosis and regional/local atrophy.