TABLE 1.
The ICV, BPV, GMV, WMV, and MyV of Men and Women
| Men (n = 53) | Women (n = 61) | P | |
|---|---|---|---|
| Age, median (range), y | 67 (22–86) | 66 (21–84) | 0.88 |
| Raw volume, mean ± SD, mL | |||
| ICV | 1530 ± 115 | 1350 ± 91 | <0.001 |
| BPV | 1260 ± 120 | 1150 ± 91 | <0.001 |
| GMV | 715 ± 69 | 650 ± 53 | <0.001 |
| WMV | 523 ± 62 | 477 ± 52 | <0.001 |
| MyV | 173 ± 24 | 154 ± 20 | <0.001 |
| Volume normalized by ICV, mean ± SD, % | |||
| BPF | 82.5 ± 5.1 | 84.9 ± 4.3 | 0.008 |
| GMF | 46.8 ± 3.5 | 48.2 ± 2.9 | 0.02 |
| WMF | 34.2 ± 2.8 | 35.3 ± 3.1 | 0.048 |
| MyF | 11.2 ± 1.2 | 11.4 ± 1.2 | 0.36 |
P values are for comparisons between men and women. All comparisons are performed with Student t test, except for age, which is analyzed using the Mann-Whitney U test. P < 0.05 is considered statistically significant.
Abbreviations: ICV, intracranial volume; BPV, brain parenchymal volume; GMV, gray matter volume; WMV, white matter volume; MyV, myelin volume; BPF, brain parenchymal fraction; GMF, gray matter fraction; WMF, white matter fraction; MyF, myelin fraction.