Patient demographics
| Variable | Patients ≥ 50 y | Patients < 50 y | p Value |
|---|---|---|---|
| Values are n or mean ± SD (range). Table shows comparisons using multivariate analysis of variance to compare older and younger patients. | |||
| n (M/F) | 30 (15/15) | 340 (171/169) | — |
| Mean age at surgery, y | 54.2 ± 4.7 | 32.8 ± 7.7 | — |
| Mean education, y | 12.67 ± 2.29 (11–18) | 12.9 ± 2.03 (11–18) | Not significant |
| Seizure duration, y | 35.8 ± 17.8 (6–62) | 25.0 ± 10.5 (1–47) | <0.001 |
| Age at seizure onset, y | 23.7 ± 16.9 (0.01–60) | 11.9 ± 9.7 (0.01–44) | <0.001 |
| Side of surgery (R/L) | 19/11 | 167/173 | Not significant |
| Age at first risk, y | 19.7 ± 18.2 (0.01–60) | 8.5 ± 9.2 (0.01–44) | <0.001 |
| Baseline full-scale IQ | 95.9 ± 13.5 (75–124) | 89.7 ± 13.0 (57–134) | <0.0156 |
| Baseline verbal IQ | 98 ± 15 (75–127) | 91 ± 13 (54–132) | <0.0051 |
| Baseline performance IQ | 95.0 ± 12.1 (76–112) | 90.7 ± 13.8 (52–142) | <0.098 |