Mean area/skull area ratios (%) of the four regions of the corpus callosum in patients and controls
| Anterior | Middle Anterior | Middle Posterior | Posterior | Total | |
| Controls (n=23) | 1.47 (0.15) | 0.78 (0.11) | 0.65 (0.11) | 1.46 (0.18) | 4.36 (0.44) |
| FTD (n=11) | 0.87 (0.15)2-150 2-151 | 0.41 (0.10)2-152 | 0.37 (0.09) | 1.06 (0.25) | 2.70 (0.49) |
| PSP (n=9) | 1.09 (0.16) | 0.47 (0.10) | 0.43 (0.11) | 1.21 (0.19) | 3.20 (0.49) |
| AD (n=16) | 1.24 (0.26) | 0.57 (0.13) | 0.45 (0.15) | 0.95 (0.19) | 3.20 (0.55) |
Values are mean (SD).
FTD=Frontotemporal dementia; PSP=progressive supranuclear palsy; AD=Alzheimer's disease.
↵2-150 p<0.05 v PSP;
↵2-151 p<0.001v AD;
↵2-152 p<0.05v AD.
Only the posterior region of patients with PSP showed no significant difference (p>0.05) compared with the controls (p<0.001 for all the other comparisons, ANOVA and post hoc Sheffe's analysis).