Table 1.
Sample characteristics
|
Right-handed (n = 126) Mean (SE) |
Non-right-handed (n = 36) Mean (SE) |
p | |
|---|---|---|---|
| Demographics | |||
| Age (years) | 38.3 (1.05) | 39.5 (1.72) | .59 |
| Gender (% male/female) | 48/52 | 42/58 | .47 |
| Education (years) | 13.2 (0.22) | 14.3 (0.49) | .02 |
| Full-scale IQ* | 93.5 (1.13) | 91.3 (2.41) | .38 |
| EHI score | 89.6 (1.19) | −50.5 (8.06) | <.001 |
| Familial sinistrality (% with/without) | 44/56 | 56/44 | .20 |
| (n with/without) | 54/70 | 20/16 | -- |
| fMRI task performance | |||
| Tone decision task (% correct) | 91.9 (0.92) | 89.8 (2.03) | .32 |
| Semantic decision task (% correct) | 81.2 (0.84) | 80.9 (1.48) | .83 |
| Seizure characteristics | |||
| Side of seizure focus (% right/left) | 44/56 | 44/56 | .93 |
| (n right/left) | 55/71 | 16/20 | -- |
| Age at onset of intractable seizures (years) | 17.7 (1.14) | 15.8 (1.82) | .41 |
| (% early/intermediate/late) | 34/32/34 | 34/40/26 | .62 |
| (n early/intermediate/late) | 42/41/42 | 12/14/9 | -- |
| Hippocampal sclerosis (% right/left/bilateral/none)** | 20/19/3/56 | 14/33/0/50 | .35 |
| (n right/left/bilateral/none) | 25/24/4/70 | 5/12/0/18 | -- |
| Later had epilepsy surgery (%) | 85 | 81 | .53 |
| (n) | 107 | 29 | -- |
Note. EHI = Edinburgh Handedness Inventory;
*
Based on Wechsler Adult Intelligence Scale – III or IV;
**
Hippocampal sclerosis data were missing for three right-handed patients and one left-handed patient.