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Frequency of "closing-in" phenomenon among study groups.
| Groups | Younger controls (N = 30) | Elderly control (N = 22) | Alzheimer's Disease* (N = 98) | Small Vessel Dementia* (N = 48) |
| Closing-in(-) | 30 | 20 | 38 | 27 |
| Closing-in(+) | ||||
| Overlap | 0 | 0 | 7 | 1 |
| Adherent | 0 | 0 | 5 | 0 |
| Near | 0 | 2 | 29 | 10 |
| Deformed drawing | 0 | 0 | 19 | 10 |
*Statistical significance was found between Alzheimer's disease and Small Vessel dementia(p-value; 0.043)
