Table 1.

Subject demographics

Number of subjects	307
Female	147 (47.9%)
Age distribution
18–19	7 (2.3%)
20–29	91 (29.6%)
30–39	93 (30.3%)
40–49	69 (22.5%)
50–59	38 (12.4%)
60–69	9 (2.9%)
Age of seizure onset	17.2 ± 12.7
Years of education	13.7 ± 2.3
Left handed	32 (10.4%)
Number of channels	126.1 ± 41.2
Electrode types
Depth	287 (93.5%)
Strips or grids	109 (35.5%)
Prior resection	47 (15.3%)
Sessions completed
1	49 (16.0%)
2	71 (23.1%)
3	93 (30.3%)
4	46 (15.0%)
5+	48 (15.6%)
Seizure onset zone
Focal	61 (19.9%)
Multifocal	93 (30.3%)
Not recorded	153 (49.8%)