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Demographic and etiological information
| Age | 44.2 ± 15.2 years (range: 19 to 81) | |
| Sex | 55 male, 55 female | |
| Handedness | 101 right-handed, 8 left-handed, 1 ambidextrous | |
| Education | 15.2 ± 2.7 years (range 11 to 20) | |
| Native speaker of English | 102 native, 8 non-native but fluent | |
| Time since first symptoms | 1479 ± 3255 days (range 4 days to 40 years) | |
| Etiology | Low grade glioma | 39 |
| High grade glioma | 49 | |
| Epileptogenic focus | 13 | |
| Vascular malformation | 5 | |
| Other | 4 | |
