Table 3.
Demographic characteristics of the Val66Met BDNF genotype in the frontal lobe lesion group
| Val/Val BDNF (n = 73) | Met/− BDNF (n = 48) | Statistics | |
|---|---|---|---|
| Age (years) | |||
| Mean ± SD | 58.2 ± 2.8 | 58.1 ± 2.9 | t = −0.19 |
| Range | 53–70 | 52–67 | p = 0.85 |
| Education (years) | |||
| Mean ± SD | 14.8 ± 2.5 | 15.0 ± 2.3 | t = 0.41 |
| Range | 8–22 | 12–20 | p = 0.68 |
| Handedness | |||
| R:A:L | 60:12:1 | 38:7:3 | χ2 = 2.18 |
| p = 0.34 | |||
| Episodic memory | |||
| Mean ± SD | 10.1 ± 3.1 | 10.6 ± 2.9 | t = 0.76 |
| Range | 4–16 | 4–16 | p = 0.45 |
| Preinjury IQ | |||
| Percentile ± SD | 63.0 ± 22.3 | 65.9 ± 20.8 | t = 0.68 |
| Range | 16–99 | 21–97 | p = 0.49 |
| Postinjury IQ | |||
| Percentile ± SD | 51.8 ± 23.2 | 54.9 ± 24.4 | t = 0.71 |
| Range | 13–98 | 15–94 | p = 0.48 |
Handedness: R, Right-handed; A, ambidextrous; L, left-handed.