Multiple linear regression analysis with the score of the mini mental state examination as the dependent variable
| Variable | Coefficient | SE | t Value | p Value |
| Total callosal/skull area ratio (%) | 4.74 | 0.84 | 5.64 | <0.0001 |
| Age (y ) | 0.004 | 0.092 | 0.047 | 0.96 |
| Education (y) | 0.11 | 0.24 | 0.43 | 0.67 |









