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Descriptive statistics for outcome variables and statistical difference between males and females
| Overall | Male | Female | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M | SD | n | M | SD | n | M | SD | n | p | |
| General cognitive ability score | < 0.001 | 0.62 | 1707 | -0.12 | 0.64 | 724 | 0.09 | 0.60 | 983 | < .001 |
| Relative white matter volume (%) | 24.71 | 0.03 | 1707 | 24.58 | 2.01 | 724 | 24.81 | 1.97 | 983 | .017 |
| Relative gray matter volume (%) | 45.24 | 0.02 | 1707 | 43.78 | 2.94 | 724 | 46.32 | 2.94 | 983 | < .001 |
